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asix electronics corporation released date: 4/24/2007 4f, no.8, hsin ann rd., science-based industrial park, hsin-chu city, taiwan, r.o.c. tel: 886-3-579-9500 fax: 886-3-579-9558 http://www.asix.com.tw AX88772 usb to 10/100 fast ethernet/homepna controller features ? single chip usb to 10/100 fast ethernet and homepna and homeplug network controller ? integrates on-chip 10/100mbps fast ethernet phy ? usb specification 1.1 and 2.0 compliant ? supports usb full and high speed modes with bus power capability ? supports 4 endpoints on usb interface ? high performance packet transfer rate over usb bus using proprietary burst transfer mechanism (submitted for us patent application) ? ieee 802.3 10base-t and 100base-tx compatible ? embedded 20kb sram for rx packet buffering and 8kb sram for tx packet buffering ? supports both full-duplex and half-duplex operation in fast ethernet ? provides optional mii inte rface for ethernet phy and homepna/ homeplug phy interface ? supports suspend mode and remote wakeup via link-up, magic packet, or external pin ? optional phy power down during suspend mode ? supports 256/512 bytes (93c56/93c66) of serial eeprom (for storing usb descriptors) ? supports automatic loading of ethernet id, usb descriptors and adapter configuration from eeprom after power-on initialization ? external phy loop-back diagnostic capability ? integrates on-chip 3.3v to 2.5v voltage regulator and requires only single power supply: 3.3v ? small form factor with 128-pin lqfp package ? 12mhz and 25mhz clock input from either crystal or oscillator source ? operating temperature range: 0 c to 70 c. *ieee is a registered trademark of the institute of electrical and electronic engineers, inc. *all other trademarks and registered trademark are the property of their respective holders. product description the AX88772 usb to 10/100 fast ethernet/homepna/homeplug controller is a high performance and highly integrated asic with embedded 28kb sram for packet buffering. it enables low cost and affordable fast ethernet network connection to desktop, notebook pc, and embedded system using popular usb ports. it has an usb interface to communicate with usb host controller and is compliant with usb specification v1.1 and v2.0. it implements 10/100mbps ethernet lan f unction based on ieee802.3, and ieee802.3u standards or homepna standard. it integrates an on-chip 10/100mbps ethernet phy to simplify system design and provides an optional media-independent interface (mii) for implementing fast ethernet and homepna functions. system block diagram always contact asix for possible updates before starting a design. this data sheet contains new products information. asix electr onics reserves the rights to m odify product speci fication without notice. no liability is assumed as a result of the us e of this product. no rights under any pa tent accompany the sale of the product. usb i/f AX88772 10/100 phy (fx) ma g netic rj45 eeprom home lan phy ma g netic rj11 document no: AX88772_11/4/24/07 magnetic r j 45
asix electronics corporation 2 AX88772 usb to 10/100 fast ethernet/homepna controller table of contents 1.0 introduction ................................................................................................................ 4 1.1 g eneral d escription ........................................................................................................... 4 1.2 AX88772 b lock d iagram .................................................................................................... 4 1.3 AX88772 p inout d iagram ................................................................................................... 5 2.0 signal description .................................................................................................... 6 3.0 function description ............................................................................................ 10 3.1 usb c ore and i nterface .................................................................................................. 10 3.2 10/100 e thernet phy......................................................................................................... 10 3.3 mac c ore ........................................................................................................................... 10 3.4 s tation m anagement (sta)............................................................................................. 10 3.5 m emory a rbiter ................................................................................................................ 11 3.6 usb to e thernet b ridge ................................................................................................... 11 3.7 s erial eeprom l oader ................................................................................................... 11 3.8 g eneral p urpose i/o.......................................................................................................... 11 4.0 serial eeprom memory map............................................................................... 13 4.1 d etailed d escription ........................................................................................................ 14 5.0 usb configurat ion structure ......................................................................... 17 5.1 usb c onfiguration ........................................................................................................... 17 5.2 usb i nterface .................................................................................................................... 17 5.3 usb e ndpoints ................................................................................................................... 17 6.0 usb commands ............................................................................................................. 18 6.1 usb s tandard c ommands ................................................................................................ 18 6.2 usb v endor c ommands .................................................................................................... 19 6.2.1 d etailed r egister d escription .................................................................................... 20 6.2.2 r emote w akeup d escription ........................................................................................ 28 6.3 i nterrupt e ndpoint ........................................................................................................... 28 7.0 embedded ethernet phy re gister description .................................... 29 7.1 d etailed r egister d escription ........................................................................................ 29 7.1.1 b asic m ode c ontrol r egister (bmcr) ...................................................................... 29 7.1.2 b asic m ode s tatus r egister (bmsr) .......................................................................... 30 7.1.3 phy i dentifier r egister 1 ............................................................................................. 31 7.1.4 phy i dentifier r egister 2 ............................................................................................. 31 7.1.5 a uto n egotiation a dvertisement r egister (anar) ............................................... 31 7.1.6 a uto n egotiation l ink p artner a bility r egister (anlpar) ................................ 32 7.1.7 a uto n egotiation e xpansion r egister (aner)......................................................... 32 8.0 electrical spec ifications ................................................................................. 33 8.1 dc c haracteristics .......................................................................................................... 33 8.1.1 a bsolute m aximum r atings ......................................................................................... 33 8.1.2 r ecommended o perating c ondition ........................................................................... 33
asix electronics corporation 3 AX88772 usb to 10/100 fast ethernet/homepna controller 8.1.3 l eakage c urrent and c apacitance ............................................................................ 34 8.1.4 dc c haracteristics of 2.5v i/o p ins ........................................................................... 34 8.1.5 dc c haracteristics of 3.3v i/o p ins ........................................................................... 34 8.2 p ower c onsumption ........................................................................................................... 35 8.2.1 i nternal p hy .................................................................................................................... 35 8.2.2 o perating through mii i nterface with i nternal e thernet phy p ower - down ... 35 8.3 p ower - up s equence ............................................................................................................ 35 8.4 ac t iming c haracteristics .............................................................................................. 36 8.4.1 clock timing .................................................................................................................. 36 8.4.2 reset timing................................................................................................................... 37 8.4.3 mii timing (100mbps)................................................................................................... 37 8.4.4 station management timing .......................................................................................... 38 8.4.5 serial eeprom timing................................................................................................. 38 9.0 package information............................................................................................ 39 10.0 ordering information ...................................................................................... 40 appendix a: system applications ................................................................................. 41 a.1 usb to f ast e thernet c onverter ..................................................................................... 41 a.2 usb to f ast e thernet and / or h ome lan c ombo solution ............................................ 41 revision history ............................................................................................................... ..... 42 list of figures f igure 1: AX88772 b lock d iagram ................................................................................................ 4 f igure 2: AX88772 p inout d iagram ................................................................................................ 5 f igure 3: i nternal d atapath d iagram of 10/100 e thernet phy and mii i nterface ........... 10 f igure 4: i nternal c ontrol m ux for s tation m anagement i nterface ................................. 11 f igure 5: m ulticast f ilter e xample ............................................................................................ 24 list of tables t able 1: p inout d escription ............................................................................................................ 6 t able 2: s erial eeprom m emory m ap ....................................................................................... 13 t able 3: usb s tandard c ommand r egister m ap ....................................................................... 18 t able 4: usb v endor c ommand r egister m ap .......................................................................... 19 t able 5: r emote w akeup t ruth t able ........................................................................................ 28 t able 6: e mbedded e thernet p hy r egister m ap ........................................................................ 29
asix electronics corporation 4 AX88772 usb to 10/100 fast ethernet/homepna controller 1.0 introduction 1.1 general description the AX88772 usb to 10/100 fast ethernet/homepna/homeplug controller is a high performance and highly integrated asic with embedded 28kb sram for packet buffering. it enables low cost and affordable fast ethernet network connection to desktop, not ebook pc, and embedded system using popular usb ports. it has an usb interface to communicate with usb host controller and is compliant with usb specification v1.1 and v2.0. it implements 10/100mbps ethernet lan f unction based on ieee802.3, and ieee802.3u standards or homepna standard. it integrates an on-chip 10/100mbps ethernet phy to simplify system design and provides an optional media-independent interface (mii) for implementing fast ethernet and homepna functions. the AX88772 needs 12mhz clock for usb operation and 25mhz cloc k for fast ethernet operation. it is in 128-pin lqfp low profile package with cmos process and requires only single 3.3v power supply to operate. 1.2 AX88772 block diagram figure 1: AX88772 block diagram rxip/rxin txop/txon mii i/f gpio2~0 mac core memory arbiter usb to ethernet bridge usb core and interface sta seeprom loader i/f dp/dm dprs/dmrs mdc mdio eecs eeck eedi eedo 28kb sram general pur p ose i/o 10/100 ethernet phy
asix electronics corporation 5 AX88772 usb to 10/100 fast ethernet/homepna controller 1.3 AX88772 pinout diagram the AX88772 is housed in the 128-pin lqfp package. figure 2: AX88772 pinout diagram int_regulator_en hs_test_mode 12345678910111213141516 33 34 35 36 37 38 39 40 41 42 43 asix AX88772 17 18 19 20 44 45 46 47 21 22 23 24 25 48 49 50 51 52 53 54 55 56 57 26 27 28 29 30 31 32 58 110 109 108 107 106 103 104 105 117 116 115 114 111 112 113 124 123 122 121 118 119 120 128 125 126 127 59 60 61 62 63 64 96 95 94 93 92 91 90 89 88 87 86 85 84 83 82 81 80 79 78 77 76 75 74 73 72 71 70 69 68 67 66 65 102 101 98 99 100 97 dmrs gnd vddk vbus testspeedup nc forcefs_n extwakeup_n gndah vdd3 scan_test scan_enable clk60ext clksel vddk gnd eeck eecs eedi eedo vdd3 v25 agnd avdd3 tx_clk tx_en nc nc tx_er txd0 txd1 txd2 txd3 nc nc nc nc gnd avddk db4 nc agnd vdd3 gnd vdd2 agnd avddk rstpb avddk agnd txop txon agnd xin25m xout25m ibref nc vddk rxip rxin gnd vdd2 vdd2 rx_clk rx_dv rx_er rxd0 rxd1 rxd2 rxd3 db3 db2 db1 db0 crs col gnd mdint mdc mdio gpio0 gpio1 gpio2 gnd vdd3 phyrst_n et_speed_led fdx_led link_led col_led rx_led usb_speed_led led gnd vddk dp dm gnd gnd vddk reset_n vddah gnd gnd xin12m xout12m avdd3 agnd rref agnd rpu dprs avdd3 gnd vdd3 nc nc avddk agnd agnd avddk avddk agnd nc nc nc int_regulator_en hs_test_mode 12345678910111213141516 33 34 35 36 37 38 39 40 41 42 43 asix AX88772 17 18 19 20 44 45 46 47 21 22 23 24 25 48 49 50 51 52 53 54 55 56 57 26 27 28 29 30 31 32 58 110 109 108 107 106 103 104 105 117 116 115 114 111 112 113 124 123 122 121 118 119 120 128 125 126 127 59 60 61 62 63 64 96 95 94 93 92 91 90 89 88 87 86 85 84 83 82 81 80 79 78 77 76 75 74 73 72 71 70 69 68 67 66 65 102 101 98 99 100 97 dmrs gnd vddk vbus testspeedup nc forcefs_n extwakeup_n gndah vdd3 scan_test scan_enable clk60ext clksel vddk gnd eeck eecs eedi eedo vdd3 v25 agnd avdd3 tx_clk tx_en nc nc tx_er txd0 txd1 txd2 txd3 nc nc nc nc gnd avddk db4 nc agnd vdd3 gnd vdd2 agnd avddk rstpb avddk agnd txop txon agnd xin25m xout25m ibref nc vddk rxip rxin gnd vdd2 vdd2 rx_clk rx_dv rx_er rxd0 rxd1 rxd2 rxd3 db3 db2 db1 db0 crs col gnd mdint mdc mdio gpio0 gpio1 gpio2 gnd vdd3 phyrst_n et_speed_led fdx_led link_led col_led rx_led usb_speed_led led gnd vddk dp dm gnd gnd vddk reset_n vddah gnd gnd xin12m xout12m avdd3 agnd rref agnd rpu dprs avdd3 gnd vdd3 nc nc avddk agnd agnd avddk avddk agnd nc nc nc hs_test_mode 12345678910111213141516 33 34 35 36 37 38 39 40 41 42 43 asix AX88772 17 18 19 20 44 45 46 47 21 22 23 24 25 48 49 50 51 52 53 54 55 56 57 26 27 28 29 30 31 32 58 110 109 108 107 106 103 104 105 117 116 115 114 111 112 113 124 123 122 121 118 119 120 128 125 126 127 59 60 61 62 63 64 96 95 94 93 92 91 90 89 88 87 86 85 84 83 82 81 80 79 78 77 76 75 74 73 72 71 70 69 68 67 66 65 102 101 98 99 100 97 dmrs gnd vddk vbus testspeedup nc forcefs_n extwakeup_n gndah vdd3 scan_test scan_enable clk60ext clksel vddk gnd eeck eecs eedi eedo vdd3 v25 agnd avdd3 tx_clk tx_en nc nc tx_er txd0 txd1 txd2 txd3 nc nc nc nc gnd avddk db4 nc agnd vdd3 gnd vdd2 agnd avddk rstpb avddk agnd txop txon agnd xin25m xout25m ibref nc vddk rxip rxin gnd vdd2 vdd2 rx_clk rx_dv rx_er rxd0 rxd1 rxd2 rxd3 db3 db2 db1 db0 crs col gnd mdint mdc mdio gpio0 gpio1 gpio2 gnd vdd3 phyrst_n et_speed_led fdx_led link_led col_led rx_led usb_speed_led led gnd vddk dp dm gnd gnd vddk reset_n vddah gnd gnd xin12m xout12m avdd3 agnd rref agnd rpu dprs avdd3 gnd vdd3 nc nc avddk agnd agnd avddk avddk agnd nc nc nc xout25m xin25m
asix electronics corporation 6 AX88772 usb to 10/100 fast ethernet/homepna controller 2.0 signal description the following abbreviations apply to the following pin description table. i2 input, 2.5v with 3.3v tolerant b2 bi -directional i/o, 2.5v with 3.3v tolerant i3 input, 3.3v b5 bi-directiona l i/o, 3.3v with 5v tolerant i5 input, 3.3v with 5v tolerant pu internal pull up (75k) o2 output, 2.5v with 3.3v tolerant pd internal pull down (75k) o3 output, 3.3v p power pin o5 output, 3.3v with 5v tolerant s schmitt trigger b bi-directional i/o table 1: pinout description pin name type pin no pin description usb interface dp b 32 usb 2.0 data positive pin. dm b 31 usb 2.0 data negative pin. dprs b 36 usb 1.1 data positive pin. please connect to dp through a 39ohm (+/-1%) serial resistor. dmrs b 35 usb 1.1 data negative pin. please connect to dm through a 39ohm (+/-1%) serial resistor. vbus i5/pd/s 10 vbus pin input. please connect to usb bus power. xin12m i3 26 12mhz crystal or oscillator cl ock input. this clock is needed for usb phy transceiver to operate. th e recommended operating frequency range is 12.000800mhz ~12.004800mhz. xout12m o3 27 12mhz crystal or oscillator clock output. rref i 30 for usb phy?s internal biasing. please connect to agnd through a 12.1kohm (+/-1%) resistor. rpu i 34 for usb phy?s internal biasi ng. please connect to avdd3 (3.3v) through a 1.5kohm (+/-5%) resistor. station management interface mdc o2 121 station management data clock output. the timing reference for mdio. all data transfers on mdio are synchronized to the rising edge of this clock. the frequency of mdc is 1.5mhz. mdio b2/pu 120 station management data input/output. serial data input/output transfers from/to the phys. the tran sfer protocol conforms to the ieee 802.3u mii spec. mdint i2/pu 117 station management interrupt input. mii interface rx_clk i2 104 receive clock. rx _clk is received from phy to p rovide timing reference for the transfer of rxd [7:0], rx_dv, and rx_er signals on receive direction of mii interface. rxd [3:0] i2 110, 109, 108, 107 receive data. rxd [3:0] is driv en synchronously with respect to rx_clk by phy. rx_dv i2 105 receive data valid. rx_dv is driven synchronously with respect to rx_clk by phy. it is asserted high when valid data is present on rxd [3:0]. rx_er i2 106 receive error. rx_er is driven synchronously with respect to rx_clk by phy. it is asserted high for one or more rx_clk periods to indicate to the mac that an error has detected. col i2 116 collision detected. col is driven high by phy when the collision is detected.
asix electronics corporation 7 AX88772 usb to 10/100 fast ethernet/homepna controller crs i2 115 carrier sense. crs is asserted high asynchronously b y the phy when either transmit or receive medium is non-idle. tx_clk i2 102 transmit clock. tx_clk is received from phy to provide timing reference for the transfer of txd [3:0], tx_en and tx_er signals on transmit direction of mii interface. txd [3:0] o2 82, 83, 84, 85 transmit data. txd [3:0] is transitioned synchronously with respect to the rising edge of tx_clk. tx_en o2 89 transmit enable. tx_en is transitioned synchronously with respect to the rising edge of tx_clk. tx_en is asserted high to indicate a valid txd [3:0]. tx_er o2 88 transmit coding error. tx_er is transitioned synchronously with respect to the rising edge of tx_clk. when asserted high for one or more tx_clk, the phy shall emit one or more code-groups that are not part of the valid data or delimiter set somewhere in the frame being transmitted. serial eeprom interface eeck o5 4 eeprom clock. eeck is an output clock to eeprom to provide timing reference for the transfer of eecs, eedi, and eedo signals. eecs o5 5 eeprom chip select. eecs is asserted high synchronously with respect to rising edge of eec k as chip select signal. eedi o5 6 eeprom data in. eedi is the serial output data to eeprom?s data input pin and is synchronous with respect to the rising edge of eeck. eedo i5/pd 9 eeprom data out. eedo is the serial input data from eeprom?s data output pin. ethernet phy interface xin25m i 58 25mhz crystal or oscillator cl ock input. this clock is needed for the embedded 10/100 ethernet phy to operate. the recommended reference frequency is 25mhz +/-0.005%. this input pin is only 2.5v tolerant and should not apply 3.3v clock signal directly to this pin if an external oscillator is used. xout25m o 59 25mhz crystal or oscillator clock output. this out put pin is 2.5v tolerant. rstpb i 65 reset input of embedded ethernet phy: rstpb is an active low input used for resetting internal ethernet phy. when internal ethernet phy is used, user can connect this pin to an external rc circuit, which gets pulled-up to avddk (2.5v). the reset period from 50ms to 150ms is recommended. rxip i 52 receive data input positive pin for both 10base-t and 100base-tx. rxin i 51 receive data input ne gative pin for both 10base-t and 100base-tx. txop o 62 transmit data output pos itive pin for both 10base-t and 100 base-tx txon o 61 transmit data output negative pin for both 10base-t and 100 base-tx ibref b 56 for ethernet phy?s internal biasing. please connect to gnd through a 12.3kohm resistor. rx_led o3 92 receive activity led indicator . this pin drives low and high in turn (blinking) when ethernet phy is receiving and drives high when not receiving. col_led o3 93 collision detected led indicator. this pin drives low when the ethernet phy detects collision and drives high when no collision. link_led o3 94 link status led indicator. this pin drives low continuously when the ethernet link is up and drives low and high in turn (blinking) when ethernet phy is in recei ving or transmitting state. fdx_led o3 95 full-duplex led indicator. this pin drives low when the ethernet phy is in full-duplex mode and drives high when in half duplex mode.
asix electronics corporation 8 AX88772 usb to 10/100 fast ethernet/homepna controller et_speed_led o3 96 ethernet speed led indicator . this pin drives low when the ethernet phy is in 100base-tx mode and drives high when in 10base-t mode. misc. pins reset_n i5/pu/s 12 chip reset input. reset_n pin is active low. when asserted, it puts the entire chip into reset state immediately. after completing reset, eeprom data will be loaded automatically. extwakeup_n i5/pu/s 11 remote-wakeup trigger from external pin. extwakeup_n should be asserted low for more than 2 cycles of 12mhz clock to be effective. for gpio [2:0] b5/pd 1, 2, 3 general purpose inpu t/ output pins. these pins are default as input pins after power-on reset. please use gpio0 for controlling the power down pin of external ethernet phy, if applicable. phyrst_n o2 122 phyrst_n is a tri-state out put used for resetting external ethernet phy. this pin is default in tri-state after power-on reset. if external ethernet phy?s reset level is active low, connect this to phy?s reset pin with a pulled-down resistor. if it?s active high, connect this to phy with a pulled-up resistor. this way can make sure the external ethernet phy stays in reset state before software brings it out of reset. forcefs_n i3/pu 15 force usb full speed (active low). for normal operation, user should keep this pin nc to enable usb high speed handshaking process to decide the speed of usb bus. setting this pin low sets the device to operate at full speed mode only and disables chirp k (hs handshaking process). led o3 125 led indicator: when usb bus is in full speed, this pin drives high continuously. when usb bus is in high speed, this pin drives low continuously. this pin drives high and low in turn (blinking) to indicate tx data transfer going on whenever the host controller sends bulk out data transfer. usb_speed_le d o3 126 usb bus speed led indicator. when usb bus is in full speed, this pin drives high continuously. when usb bus is in high speed, this pin drives low continuously. testspeedup i3/pd 13 test pin. for normal operation, user should keep this pin nc. hs_test_mode i3/pd 42 test pin. for normal operation, user should keep this pin nc. scan_test i3/pd 43 test pin. for normal operation, user should keep this pin nc. scan_enable i3/pd 44 test pin. for normal operation, user should keep this pin nc. clk60ext i3/pd 45 test pin. for normal operation, user should keep this pin nc. clksel i3/pd 46 test pin. for normal operation, user should keep this pin nc. db [4:0] i2 101, 111, 112, 113, 114 debug pins. for normal operation, user should set these pins low. on-chip regulator pins int_regulato r_en i 20 on-chip 3.3v to 2.5v voltage regulator enable. connect this pin to vddah directly to enable on-chip regulator. connect this pin to gndah to disable on-chip regulator. vddah p 22 3.3v power supply to on-chip 3.3v to 2.5v voltage regulator. gndah p 23 ground pin of on-chip 3.3v to 2.5v voltage regulator. v25 p 21 2.5v voltage output of on-chip 3.3v to 2.5v voltage regulator. power and ground pins vddk p 16, 24, 74, 99, 118 digital core power. 2.5v. vdd2 p 80, 86, 123 digital i/o power. 2.5v. vdd3 p 8, 19, 41, 97, 128 digital i/o power. 3.3v.
asix electronics corporation 9 AX88772 usb to 10/100 fast ethernet/homepna controller gnd p 7, 17, 18, 25, 40, 75, 81, 87, 98, 100, 119, 124, 127 digital ground. avddk p 49, 53, 57, 64, 66, 68 analog core power. 2.5v. avdd3 p 28, 37, 39 analog i/o power. 3.3v. agnd p 29, 33, 38, 50, 54, 55, 60, 63, 67, 69 analog ground.
asix electronics corporation 10 AX88772 usb to 10/100 fast ethernet/homepna controller 3.0 function description 3.1 usb core and interface the usb core and interface contains an usb 2.0 transcei ver, serial interface engine (sie), usb bus protocol handshaking block, usb standard command, vendor command registers, logic for supporting bulk transfer, and interrupt transfer, etc. the usb interface is used to communicate with usb host c ontroller and is compliant with usb specification v1.1 and v2.0. 3.2 10/100 ethernet phy the 10/100 fast ethernet phy is complia nt with ieee 802.3 and ieee 802.3u standard s. it contains an on-chip crystal oscillator, pll-based clock multiplier, digital phase-locke d loop for data/timing recovery . it provides over-sampling mixed-signal transmit drivers complying with 10/100base-tx transmit wave shaping / slew rate control requirements. it has robust mixed-signal loop adaptive equalizer for receiving signa l recovery. it contains baseline wander corrective block to compensate data dependent offset due to ac coupling transformers. it supports auto-negotiation and has multi-function led outputs. 3.3 mac core the mac core supports 802.3 and 802.3u mac sub-layer functi ons, such as basic mac frame receive and transmit, crc checking and generation, filtering, forwarding, flow-control in full-duplex mode, and collision-detection and handling in half-duplex mode, etc. it provides a media-inde pendent interface (mii) for impl ementing fast ethernet and homepna functions. the mac core interfaces to both extern al mii interface i/o pins and mii in terface of the embedded 10/100 ethernet phy. the selection between the two mii interfaces is done via usb vendor command, soft ware phy select register. figure 3 shows the datapath diagram of 10/100 ethernet phy and mii interface to mac core. figure 3: internal datapath diagram of 10/100 ethernet phy and mii interface 3.4 station management (sta) the station management interface provides a simple, two-wire, serial interface to connect to a managed phy device for the purposes of controlling the phy and gathering status from the phy. the station management interface allows mac core 10/100 ethernet phy rx tx mii interface i/o: rx_clk, rxd [3:0], rx_dv, rx_er, col, crs tx_clk, txd [3:0], tx_en, tx_e r rxip/rxin txop/txon
asix electronics corporation 11 AX88772 usb to 10/100 fast ethernet/homepna controller communicating with multiple phy devices at the same time by identifying the managed phy with 5-bit, unique phy id. the phy id of the embedded 10/100 ethernet phy is being pre-assigned to ?1_0000?. figure 4 shows the internal control mux for the station management interface. wh en doing read, the ?mdin? signal will be driven from 10/100 ethernet phy only if phy id matches with ?1_0000?, otherwise, it will always be driven from external mdio pin of the asic. figure 4: internal control mux for station management interface 3.5 memory arbiter the memory arbiter block is responsible for storing received mac frames into on-chip sram (packet buffer) and then forwarding to usb bus upon request from usb host via bulk in transfer. it also monitors packet buffer usage in full-duplex mode for triggering pause frame transmission out on tx direction. the memory arbiter block is also responsible for storing mac frames received from usb host via bulk out transfer and wa iting to be transmitted out towards ethernet network. 3.6 usb to ethernet bridge the usb to ethernet bridge block is responsible for conve rting ethernet mac frame into usb packets or vice-versa. this block supports proprietary burst transfer mechanism (s ubmitted for us patent applica tion) to offload software burden and to offer very high packet transfer throughput over usb bus. 3.7 serial eeprom loader the serial eeprom loader is responsible for reading configuration data automatically from external serial eeprom after power-on reset. 3.8 general purpose i/o there are 3 general purpose i/o pins provided by this asic. sta 10/100 ethernet phy ph y id = 1 _ 0000 mdc mdio mdin mdout
asix electronics corporation 12 AX88772 usb to 10/100 fast ethernet/homepna controller 3.9 mac to mac connection via mii interface below figure shows recommended mac-to-mac connection for AX88772 mii interfacing with an external ethernet mac device. when operating at this mode, the ethernet ma c on both sides should be set to operate at 100m full-duplex mode. the u1 & r1 are reserved for adjusting rxdv/rxd[3:0] input setup/hold time with respect to AX88772 rx_clk clock phase. either r2 or r1 is installed at a time. user should check the tx_clk, txd[3:0], txen output timing of external ethernet mac device vs. AX88772?s rxdv/rxd[3:0] input setup/hold time. the u2 & r3 are reserved for adjusting rxdv/rxd[3:0] i nput setup/hold time with respect to rx_clk clock phase on external ethernet mac device. either r3 or r4 is installed at a time. user should check the tx_clk, txd[3:0], txen output timing of AX88772 vs. the rxdv/rxd[3:0] setup/hold time of external ethernet mac device. AX88772 10/100m ethernet mac rx_cl k rxd3 rxd2 rxd1 rxd0 rxdv crs col rxe r tx_clk txd3 txd2 txd1 txd0 txen txer tx_cl k txd3 txd2 txd1 txd0 txen txe r rx_clk rxd3 rxd2 rxd1 rxd0 rxdv crs col rxer mdc mdio gpio mdc mdio mdint 4.7k r3 0 r4 0 u2 3.3v 47k 4.7k r1 0 r2 0 u1 3.3v 47k l3 sbk160808t-110y-s 11 ohm@100mhz 3.3v 0.1 f 0.1 f 25mhz-osc out vcc gnd r5 22
asix electronics corporation 13 AX88772 usb to 10/100 fast ethernet/homepna controller 4.0 serial eeprom memory map eeprom offset high byte low byte 00h reserved word count for preload 01h flag 02h length of high-speed device descriptor (bytes) eeprom offset of high-speed device descriptor 03h length of high-speed configuration descriptor (bytes) eeprom offset of high-speed configuration descriptor 04h node id 1 node id 0 05h node id 3 node id 2 06h node id 5 node id 4 07h language id high byte language id low byte 08h length of manufacture string (bytes) eeprom offset of manufacture string 09h length of product string (bytes) eeprom offset of product string 0ah length of serial number string (bytes) eeprom offset of serial number string 0bh length of configuration string (bytes) eeprom offset of configuration string 0ch length of interface 0 string (bytes ) eeprom offset of interface 0 string 0dh length of interface 1/0 string (bytes) eeprom offset of interface 1/0 string 0eh length of interface 1/1 string (bytes) eeprom offset of interface 1/1 string 0fh phy register offset for interrupt endpoint phy register offset for interrupt endpoint 10h max packet size high byte max packet size low byte 11h secondary phy_type [7:5] and phy_id [4:0] primary phy_type [7:5] and phy_id [4:0] 12h pause frame high water mark pause frame low water mark 13h length of full-speed device descriptor (bytes) eeprom offset of full-speed device descriptor 14h length of full-speed configuration descriptor (bytes) eeprom offset of full-speed configuration descriptor 15h-1fh reserved reserved table 2: serial eeprom memory map
asix electronics corporation 14 AX88772 usb to 10/100 fast ethernet/homepna controller 4.1 detailed description the following sections provide detailed description for some of the field in serial eeprom me mory map, for other fields not covered here, please refer to AX88772 eeprom user guide for more details. 4.1.1 word count for preload (00h) the number of words to be preloaded by the eeprom loader = 15h. 4.1.2 flag (01h) bit 15 bit 14 bit 13 bit 12 bit 11 bit 10 bit 9 bit 8 reserved tdpe cem bit 7 bit 6 bit 5 bit 4 bit 3 bit 2 bit 1 bit 0 tace rdce scpr dck 1 rwu reserved sp sp: self-power (for usb getstatus) 1: self power. 0: bus power. rwu: remote wakeup support. 1: indicate that this device supports remote wakeup. 0: not support. dck: disable chirp k. 1: disabled. 0: enable. scpr: software control phy reset. 1: the prl and prte bits of software reset register control the phyrst_n output level. 0: the usb reset on usb bus and prte bit of software reset register control the phyrst_n output level. rdce: rx drop crc enable. 1: crc byte is dropped on receive d mac frame forwarding to host. 0: crc byte is not dropped. tace: tx append crc enable. 1: crc byte is generated and appended by the asic for every transmitted mac frame. 0: crc byte is not appended. cem: capture effective mode. 1: capture effective mode enable. 0: disabled. tdpe: test debug port enable. 1: enable test debug port for chip debug purpose. 0: disable test debug port and the chip operate in normal function mode bit 1, 10~15: reserved. 4.1.3 node id (04~06h) the node id 0 to 5 bytes represent the mac address of the device, for example, if mac address = 01-23-45-67-89-abh, then node id 0 = 01, node id 1 = 23, node id 2 = 45, node id 3 = 67, node id 4 = 89, and node id 5 = ab.
asix electronics corporation 15 AX88772 usb to 10/100 fast ethernet/homepna controller 4.1.4 phy register offset for interrupt endpoint (0fh) bit 15 bit 14 bit 13 bit 12 bit 11 bit 10 bit 9 bit 8 reserved phy register offset 1 bit 7 bit 6 bit 5 bit 4 bit 3 bit 2 bit 1 bit 0 reserved phy register offset 2 phy register offset 1: fill in phy? s register offset of primary phy here . upon each interrupt endpoint issued, its register value will be reported in byte # 5 and 6 of interr upt endpoint packet. phy register offset 2: fill in phy?s register offset of primary phy here. upon each interrupt endpoint issued, its register value will be reported in byte # 7 and 8 of interr upt endpoint packet. 4.1.5 max packet size high/low byte (10h) fill in this field the maximum rx/tx mac frame size suppor ted by this asic. the number must be even number in terms of byte and should be less than or equal to 2500 bytes. 4.1.6 primary/secondary phy_type and phy_id (11h) the 3 bits phy_type field for both primary and secondary phy is defined as follows, 3?b000: 10/100 ethernet phy or 1m home phy. 3?b111: non-supported phy. for example, the high byte value of ?e0h? means that secondary phy is not supported. note that the phy_id of the embedded 10/100 ethernet phy is being assigned to 5?b1_0000. 4.1.7 pause frame high water and low water mark (12h) when operating in full-duplex mode, correct setting of this field is very importa nt and can affect the overall packet receive throughput performance in a great d eal. the high water mark is the thres hold to trigger sending of pause frame and the low water mark is the threshold to stop sending of pause frame. note that each free buffer count here represents 256 bytes of packet storage space in sram. total free buffer count = 80 start sendin g pause frame when free buffer < hi g h water mar k 0 sto p sendin g pause frame when free buffer > low water mar k
asix electronics corporation 16 AX88772 usb to 10/100 fast ethernet/homepna controller 4.1.8 power-up steps after power-on reset, the asic will automatically perform fo llowing steps to the ethernet phys via mdc/mdio lines, 1. write to phy_id of 00h with phy register offset 00h to power down all phys attached to station management interface. 2. write to primary phy_id with phy register offset 00h to power down primary phy. 3. write to secondary phy_id with phy register offset 00h to power down secondary phy.
asix electronics corporation 17 AX88772 usb to 10/100 fast ethernet/homepna controller 5.0 usb configuration structure 5.1 usb configuration the AX88772 supports 1 configuration only. 5.2 usb interface the AX88772 supports 1 interface. 5.3 usb endpoints the AX88772 supports following 4 endpoints: endpoint 0: control endpoint. it is used for configuri ng the device, e.g., standard commands and vendor commands, etc. endpoint 1: interrupt endpoint. it is used for reporting status. endpoint 2: bulk in endpoi nt. it is used for r eceiving ethernet packet. endpoint 3: bulk out endpoi nt. it is used for tran smitting ethernet packet.
asix electronics corporation 18 AX88772 usb to 10/100 fast ethernet/homepna controller 6.0 usb commands there are three command groups for endpoint 0 (control endpoint) in AX88772: the usb standard commands the usb vendor commands the usb communication class commands 6.1 usb standard commands the language id is 0x0904 for english ppll means buffer length cc means configuration number i i means interface number aa means device address setup command data bytes access type description 8006_00 01 00 00 llpp ppll bytes in data stage read get device descriptor 8006_0002 0000_llpp ppll bytes in data stage read get configuration descriptor 8006_0003_0000_llpp ppll bytes in da ta stage read get supported language id 8006_0103_0904_llpp ppll bytes in data stage read get manufacture string 8006_0203_0904_llpp ppll bytes in data st age read get product string 8006_0303_0904_llpp ppll bytes in da ta stage read get serial number string 8006_0403_0904_llpp ppll bytes in data stage read get configuration string 8006_0503_0904_llpp ppll by tes in data stage read get interface 0 string 8006_0603_0904_llpp ppll by tes in data stage read get interface 1/0 string 8006_0703_0904_llpp ppll by tes in data stage read get interface 1/1 string 8008_0000_0000_0100 1 bytes in data stage read get configuration 0009_cc00_0000_0000 no data in data stage write set configuration 810a_0000 _i i00_0100 1 bytes in data stage read get interface 010b_as00_0000_0000 no data in data stage write set interface 0005_aa00_0000_0000 no data in data stage write set address table 3: usb standard command register map
asix electronics corporation 19 AX88772 usb to 10/100 fast ethernet/homepna controller 6.2 usb vendor commands no setup command data bytes access type description 1. c002_aa0b_0c00_0800 8 bytes in data stage read rx /tx sram read register 2. 4003_aa0b_0c00_0800 8 bytes in data stage write rx/tx sram write register 3. 4006_0000_0000_0000 no data in data stage write software serial management control register 4. c007_ aa00_cc00_0200 2 bytes in data stage read phy read register 5. 4008 _aa00_cc00_0200 2 bytes in data stage write phy write register 6. c009_0000_0000_0100 1 bytes in data stage read se rial management status register 7. 400a_0000_0000_0000 no data in data stage write hardware serial management control register 8. c00b_aa00_0000_0200 2 bytes in data stage read srom read register 9. 400c_aa00_ccdd_0000 no data in data stage write srom write register 10. 400d_0000_0000_0000 no data in data stage write srom write enable register 11. 400e_0000_0000_0000 no data in data stage write srom write disable register 12. c00f_0000_0000_0200 2 bytes in data stage read rx control register 13. 4010_aabb_0000_0000 no data in data stage write rx control register 14. c011_0000_0000_0300 3 bytes in data stage read ipg/ipg1/ipg2 register 15. 4012_aabb_cc00_0000 no data in data stage write ipg/ipg1/ipg2 register 16. c013_0000_0000_0600 6 bytes in data stage read node id register 17. 4014_0000_0000_0600 6 bytes in data stage write node id register 18. c015_0000_0000_0800 8 bytes, ma0~ma7 , in data stage read multicast filter array register 19. 4016_0000_0000_0800 8 bytes, ma0~ma7 , in data stage write multicast filter array register 20. 4017_aa00_0000_0000 no data in data stage write test register 21. c019_0000_0000_0200 2 bytes in data stage read ethernet/homepna phy address register 22. c01a_0000_0000_0200 2 bytes in data stage read medium status register 23. 401b_aabb_0000 _0000 no data in data stage write medium mode register 24. c01c_0000_0000_0100 1bytes in data stage read monitor mode status register 25. 401d_aa00_0000_0000 no data in data stage write monitor mode register 26. c01e _0000_0000_0100 1 bytes in data stage read gpios status register 27. 401f_aa00_0000_0000 no data in data stage write gpios register 28. 4020_aa00_0000_0000 no data in data stage write software reset register 29. c021_aa00_0000_0100 1 bytes in data stage read software phy select status register 30. 4022_aa00_0000_0000 no data in data stage write software phy select register table 4: usb vendor command register map
asix electronics corporation 20 AX88772 usb to 10/100 fast ethernet/homepna controller 6.2.1 detailed register description 6.2.1.1 rx/tx sram read register (02h, read only) bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0 aa [7:0] reserved b [3:0] 0h c [3:0] dd [7:0] in data stage ee [7:0] in data stage ff [7:0] in data stage gg [7:0] in data stage hh [7:0] in data stage ii [7:0] in data stage jj [7:0] in data stage kk [7:0] in data stage {b [3:0], aa [7:0]}: the read address of rx or tx sram. c [0]: ram selection. 0: indicates to read from rx sram. 1: indicates to read from tx sram. c [3:1]: reserved. {dd [7:0], ee [7:0], ff [7:0], gg [7:0], hh [7:0], ii [7:0], jj [7:0], kk [7:0]}: the 64-bits of data presented in data stage are the data to be written to rx or tx sram. 6.2.1.2 rx/tx sram write register (03h, write only) bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0 aa [7:0] reserved b [3:0] reserved c [3:0] dd [7:0] in data stage ee [7:0] in data stage ff [7:0] in data stage gg [7:0] in data stage hh [7:0] in data stage ii [7:0] in data stage jj [7:0] in data stage kk [7:0] in data stage {b [3:0], aa [7:0]}: the write address of rx or tx sram. c [0]: ram selection. 0: indicates to write to rx sram. 1: indicates to write to tx sram. c [3:1]: reserved. {dd [7:0], ee [7:0], ff [7:0], gg [7:0], hh [7:0], ii [7:0], jj [7:0], kk [7:0]}: the 64-bits of data presented in data stage are the data to be written to rx or tx sram. 6.2.1.3 software serial management c ontrol register (06h, write only) when software needs to access to ethernet phy?s internal registers, one has to first issue this command to request the ownership of serial manage ment interface. the ownership status of the interface can be retrieved from serial management status register.
asix electronics corporation 21 AX88772 usb to 10/100 fast ethernet/homepna controller 6.2.1.4 phy read register (07h, read only) bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0 aa [7:0] 00h cc [7:0] aa [4:0]: the phy id value. cc [4:0]: the register address of ethernet phy?s internal register. aa [7:5]: reserved cc [7:5]: reserved 6.2.1.5 phy write register (08h, write only) bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0 aa [7:0] 00h cc [7:0] aa [4:0]: the phy id value. cc [4:0]: the register address of ethernet phy?s internal register. aa [7:5]: reserved cc [7:5]: reserved 6.2.1.6 serial management status register (09h, read only) bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0 reserved host_en host_en: host access enable. software can read this register to determ ine the current ownership of serial management interface. 1: software is allowed to access ethern et phy?s internal registers via phy r ead register or phy write registers. 0: asic?s hardware owns the serial management interface and so ftware?s access is ignored. 6.2.1.7 hardware serial management c ontrol register (0ah, write only) when software is done accessing serial management interface, one needs to issue this command to release the ownership of the interface back to asic?s hardware. afte r issuing this command, follo wing phy read register or phy write register from software will be ignored. note : software should issue this command every time after finished accessing serial manage ment interface to release the ownership back to hardware to allow periodic interrupt endpoint to be able to access the ethernet phy?s registers via the serial management interface. 6.2.1.8 srom read register (0bh, read only) bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0 aa [7:0] aa [7:0]: the read address of serial eerom.
asix electronics corporation 22 AX88772 usb to 10/100 fast ethernet/homepna controller 6.2.1.9 srom write register (0ch, write only) bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0 aa [7:0] 00h cc [7:0] dd [7:0] aa [7:0]: the write address of serial eerom. { dd [7:0], cc [7:0] }: the write data value of serial eerom 6.2.1.10 write srom enable (0dh, write only) user issues this command to enable write perm ission to serial eeprom from srom write register. 6.2.1.11 write srom disable (0eh, write only) user issues this command to disable write perm ission to serial eeprom from srom write register. 6.2.1.12 rx control register (0fh, read only and 10h, write only) bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0 so reserved ap am ab sep amall pro 0h reserved mfb [1:0] aa [7:0] = { so, reserved, ap, am, ab, reserved, amall, pro } bb [7:0] = { 0h, reserv ed [3:2], sb [1:0] } pro: packet_type_promiscuous. 1: all frames received by the asic are forwarded up toward the host. 0: disabled (default). amall: packet_type_all_multicast. 1: all multicast frames received by the asic are forw arded up toward the host, not just the frames whose scrambling result of da matching with multicast address list provided in multicast filter array register. 0: disabled. this only allows multicast frames whose scrambling result of da field matching with multicast address list provided in multicast filter array register to be forwarded up toward the host (default). sep: save error packet. 1: received packets with crc error ar e saved and forwarded to the host anyway. 0: received packets with crc error are discarded auto matically without forwardi ng to the host (default). ab: packet_type_broadcast. 1: all broadcast frames received by the asic are forwarded up toward the host (default). 0: disabled. am: packet_type_multicast. 1: all multicast frames whose scrambling result of da matching with multicast address list are forwarded up to the host (default). 0: disabled. ap: accept physical address from multicast filter array. 1: allow unicast packets to be forwarded up toward host if the lookup of scrambling result of da is found within multicast address list. 0: disabled, that is, unicast pack ets filtering are done without regard ing multicast address list (default). so: start operation. 1: ethernet mac start operating. 0: ethernet mac stop operating (default).
asix electronics corporation 23 AX88772 usb to 10/100 fast ethernet/homepna controller mfb [1:0]: maximum frame burst transfer on usb bus. 00: 2048 bytes 01: 4096 bytes 10: 8192 bytes 11: 16384 bytes (default). 6.2.1.13 ipg/ipg1/ipg2 control register (11h, read only and 12h, write only) bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0 aa [7:0] bb [7:0] cc [7:0] aa [6:0] = ipg [6:0]. bb [6:0] = ipg1 [6:0]. cc [6:0] = ipg2 [6:0]. ipg [6:0]: inter packet gap for back-to-back transfer on tx direction in mii mode (default = 15h). ipg1 [6:0]: ipg part1 value (default = 0ch). ipg2 [6:0]: ipg part1 value + part2 value (default = 12h). aa [7]: reserved. bb [7]: reserved. cc [7]: reserved. 6.2.1.14 node id register (13h, read only and 14h, write only) bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0 aa [7:0] bb [7:0] cc [7:0] dd [7:0] ee [7:0] ff [7:0] aa [7:0] = noid 0. bb [7:0] = noid 1. cc [7:0] = noid 2. dd [7:0] = noid 3. ee [7:0] = noid 4. ff [7:0] = noid 5. {ff [7:0], ee [7:0], dd [7:0], cc [7:0], bb [7:0], aa [7:0]} = ethernet mac address [47:0] of the node.
asix electronics corporation 24 AX88772 usb to 10/100 fast ethernet/homepna controller 6.2.1.15 multicast filter array (15h, read only and 16h, write only) bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0 ma 0 [7:0] ma 1 [7:0] ma 2 [7:0] ma 3 [7:0] ma 4 [7:0] ma 5 [7:0] ma 6 [7:0] ma 7 [7:0] {ma7 [7:0], ma6 [7:0], ma5 [7:0], ma4 [7:0], ma3 [7 :0], ma2 [7:0], ma1 [7:0], ma0 [7:0]} = the multicast address bit map for multicast frame filtering block. see figure 5: multicast filter example, for example. figure 5: multicast filter example 6.2.1.16 test register (17h, write only) bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0 mm [7:6] ldrnd ldrnd: load random number into mac?s exponential back-off timer. user writes a ?1? to enable the asic to load a small random number into mac?s back-off timer to shorten the back-off duration in each retry after collision. this register is used for test purpose. default value = 0. mm [7:6]: reserved. 6.2.1.17 ethernet / homepna phy address register (19h, read only) bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0 secphytype [2:0] secphyid [4:0] priphytype [2:0] priphyid [4:0] secphytype, secphyid: the secondary phy address loaded from serial eeprom?s offset address 11h. priphytype, priphyid: the primarily phy address loaded from serial eeprom?s offset address 11h. da 81 81 81 81 81 81 crc32 {crc31, 30, 29, 28, 27, 26} mar[63:0] = 400_0000h address[5:0] = 1ah
asix electronics corporation 25 AX88772 usb to 10/100 fast ethernet/homepna controller 6.2.1.18 medium status register (1ah, read only) and medium mode register (1bh, write only) bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0 pf 0 tfc rfc 0 1 fd 0 reserved sm sbp reserved ps re aa [7:0] = {pf, jfe, tfc, rfc, en125, ac, fd, gm}. bb [7:0] = {reserved, sm, sbp, je, ps, re}. bit 0: please always write 0 to this bit. ps: port speed in mii mode 1: 100 mbps (default). 0: 10 mbps. fd: full duplex mode 1: full duplex mode (default). 0: half duplex mode. bit 2: please always write 1 to this bit. bit 3: please always write 0 to this bit. rfc: rx flow control enable. 1: enable receiving of pause frame on rx direction during full duplex mode (default). 0: disabled. tfc: tx flow control enable. 1: enable transmitting pause frame on tx direction during full duplex mode (default). 0: disabled. bit 6: please always write 0 to this bit. pf: check only ?length/typ e? field for pause frame. 1: enable, i.e., pause frames are identified only based on l/t filed. 0: disabled, i.e., pause frames are identified based on both da and l/t fields (default). re: receive enable. 1: enable rx path of the asic. 0: disabled (default). sbp: stop backpressure. 1: when tfc bit = 1, setting this bit enables backpressure on tx direction ?continuously? during rx buffer full condition in half duplex mode. 0: when tfc bit = 1, setting this bit enable backpressure on tx direction ?intermittently? during rx buffer full condition in half duplex mode (default). sm: super mac support. 1: enable super mac to shorten exponential back-off time during transmit retry. 0: disabled (default). 6.2.1.19 monitor mode status register (1ch, read only) bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0 reserved us reserved rwmp rwlu mom mom: monitor mode. 1: enable. all received packets will be ch ecked on da and crc but not buffered into memory. 0: disabled (default). rwlu: remote wakeup trigger by ethernet link-up. 1: enable 0: disabled (default). rwmp: remote wakeup trigger by magic packet. 1: enable 0: disabled (default). us: usb speed. 1: high speed mode. 0: fs speed mode.
asix electronics corporation 26 AX88772 usb to 10/100 fast ethernet/homepna controller 6.2.1.20 monitor mode register (1dh, write only) bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0 reserved rwmp rwlu mom mom: monitor mode. 1: enable. all received packets will be ch ecked on da and crc but not buffered into memory. 0: disabled (default). rwlu: remote wakeup trigger by ethernet link-up. 1: enable. 0: disabled (default). rwmp: remote wakeup trigger by magic packet. 1: enable. 0: disabled (default). aa [7:3]: reserved. 6.2.1.21 gpio status register (1eh, read only) bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0 gpi_2 gpo_2_en gpi_1 gpo_1_en gpi_0 gpo_0_en gpo_0_en: current level of pin gpio0?s output enable. gpi_0: input level on gpio0 pin when gpio0 is as an input pin. gpo_1_en: current level of pin gpio1?s output enable. gpi_1: input level on gpio1 pin when gpio1 is as an input pin. gpo_2_en: current level of pin gpio2?s output enable. gpi_2: input level on gpio2 pin when gpio2 is as an input pin. 6.2.1.22 gpio register (1fh, write only) bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0 rse gpo_2 gpo2en gpo_1 gpo1en gpo_0 gpo0en gpo0en: pin gpio0 output enable. 1: output is enabled (meaning gpio0 is used as an output pin). 0: output is tri-stated (meaning gpio0 is used as an input pin) (default). gpo_0: pin gpio0 output value. gpo1en: pin gpio1 output enable. 1: output is enabled (meaning gpio1 is used as an output pin). 0: output is tri-stated (meaning gpio1 is used as an input pin) (default). gpo_1: pin gpio1 output value. 0: (default). gpo2en: pin gpio2 output enable. 1: output is enabled (meaning gpio2 is used as an output pin). 0: output is tri-stated (meaning gpio2 is used as an input pin) (default). gpo_2: pin gpio2 output value. 0: (default). rse: reload serial eeprom. 1: enable. 0: disabled (default)
asix electronics corporation 27 AX88772 usb to 10/100 fast ethernet/homepna controller 6.2.1.23 software reset register (20h, write only) bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0 reserved ippd iprl bz prl prte rt rr rr: clear frame length error for bulk in. 1: set high to clear state. 0: set low to exit clear state (default). rt: clear frame length error for bulk out. 1: set high to enter clear state. 0: set low to exit clear state (default). prte: external phy reset pin tri-state enable. 1: enable, i.e., the external phyrst_n pin is tri-stated (default). this allows the phyrst_n pin?s active level to be controlled by external pulled-up (active high during power-on) or pulled-down resistor (active low during power-on). 0: disabled, i.e., the external phyrst_n pin?s level is driven by either prl bit or internal ?usb reset? based on the setting in scpr bit in flag byte of eeprom. prl: external phy reset pin level. when scpr bit = 1 and prte = 0, this bit controls the output level of external phyrst_n pin. 1: set to high (default). 0: set to low. bz: force bulk in to re turn a zero-length packet. 1: software can force bulk in to return a zero-length usb packet. 0: normal operation mode (default). iprl: internal phy reset control. when scpr bit = 1, this bit acts as reset signal of internal ethernet phy. 1: internal ethernet phy is in operating state. 0: internal ethernet phy in reset state (default). ippd: internal ethernet phy power down control. 1: internal ethernet phy is in power down mode (default). 0: internal ethernet phy is in operating mode. 6.2.1.24 software phy select status register (21h, read only) and so ftware phy select register 22h, write only) bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0 reserved asel psel psel: phy select, when as el = 0 (manually select the phy to operate) 1: select embedded 10/100 ethernet phy (default). 0: select external ph y, which is attached to the mii interface asel: auto select or manual select 1: automatically select based on link status of embedded 10/100 ethernet phy (default). 0: manually select between the embedded 10/100 ethernet phy and the external one.
asix electronics corporation 28 AX88772 usb to 10/100 fast ethernet/homepna controller 6.2.2 remote wakeup description after AX88772 enters into suspend mode, either the usb host or AX88772 itself can awake it up and resume back to the original operation mode before it entered suspend. following truth table shows the chip setting, wakeup event, and device response supported by this asic. note that ?x? stands for don?t-care. setting wakeup event device awakes up? wakeup by rwu bit of flag byte in eepro m set_feature standard command rwlu of monitor mode register rwmp of monitor mode register host send resume signal receiving magic packet extwake up_n pin linkup detected on primary phy linkup detected on secondary phy host x x x x j -> k yes device 0 0 x x x x x x no device 1 1 0 1 yes yes device 1 1 1 0 yes yes device 1 1 1 0 yes yes device 1 1 x x low-pulse yes table 5: remote wakeup truth table 6.3 interrupt endpoint the interrupt endpoint contains 8 bytes of data and its frame format is defined as: a100_bb00_ccdd_eeff. where bb byte in byte 3: bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0 reserved mdint fle spls ppls ppls: primarily phy link state. 1: link is up. 0: link is down. spls: secondary phy link state. 1: link is up. 0: link is down. fle: bulk out ethernet frame length error. 1: proprietary length field has parity error during bulk out transaction. 0: proprietary length field has no parity error during bulk out transaction. mdint: input level of mdint pin. the mdint pin can be connected to mdint# pin of ethernet phy. 1: when mdint input pin = 1. 0: when mdint input pin = 0. ccdd byte in byte 5 and 6: primary phy?s register value, whose offset is given in high byte of eeprom offset 0fh. eeff byte in byte 7 and 8: primary phy?s register value, whose offset is given in low byte of eeprom offset 0fh.
asix electronics corporation 29 AX88772 usb to 10/100 fast ethernet/homepna controller 7.0 embedded ethernet phy register description address register name description 0h bmcr basic mode control register, basic register. 1h bmsr basic mode status register, basic register. 2h phyidr1 phy identifier register 1, extended register. 3h phyidr2 phy identifier register 2, extended register. 4h anar auto negotiation advertisem ent register, extended register. 5h anlpar auto negotiation link partner ability register, extended register. 6h aner auto negotiation expansion register, extended register. 7h reserved reserved and currently not supported. 8h-fh ieee reserved ieee 802.3u reserved. table 6: embedded ethernet phy register map 7.1 detailed register description the following abbreviations apply to following s ections for detailed register description. reset value: 1: bit set to logic one 0: bit set to logic zero x: no set value pin#: value latched from pin # at reset time access type: ro: read only rw: read or write attribute: sc: self-clearing ps: value is permanently set ll: latch low lh: latch high 7.1.1 basic mode control register (bmcr) address 00h bit bit name default description 15 reset 0, rw / sc reset: 1 = software reset 0 = normal operation 14 loopback 0, rw loopback: 1 = loopback enabled 0 = normal operation 13 speed selection 1, rw speed selection: 1 = 100 mb/s 0 = 10 mb/s 12 auto-negotiation enable 1, rw auto-negotiation enable: 1 = auto-negotiation enabled. bits 8 and 13 of this register are ignored when this bit is set. 0 = auto-negotiation disabled. bits 8 and 13 of this register determine the link speed and mode. 11 power down 0, rw power down:
asix electronics corporation 30 AX88772 usb to 10/100 fast ethernet/homepna controller 1 = power down 0 = normal operation 10 isolate (phyad = 00000), rw isolate: 1 = isolate 0 = normal operation 9 restart auto-negotiation 0, rw / sc restart auto-negotiation: 1 = restart auto-negotiation 0 = normal operation 8 duplex mode 1, rw duplex mode: 1 = full duplex operation 0 = normal operation 7 collision test 0, rw collision test: 1 = collision test enabled 0 = normal operation 6:0 reserved x, ro reserved: write as 0, read as ?don?t care?. 7.1.2 basic mode status register (bmsr) address 01h bit bit name default description 15 100base-t4 0, ro / ps 100base-t4 capable: 0 = this phy is not able to perform in 100base-t4 mode. 14 100base-tx full duplex 1, ro / ps 100base-tx full-duplex capable: 1 = this phy is able to perform in 100base-tx full-duplex mode. 13 100base-tx half duplex 1, ro / ps 100base-tx half-duplex capable: 1 = this phy is able to perform in 100base-tx half-duplex mode. 12 10base-t full duplex 1, ro / ps 10base-t full-duplex capable: 1 = this phy is able to perform in 10base-t full-duplex mode. 11 10base-t half duplex 1, ro / ps 10base-t half-duplex capable: 1 = this phy is able to perform in 10base-t half-duplex mode. 10:7 reserved 0, ro reserved: write as 0, read as ?don?t care?. 6 mf preamble suppression 0, ro / ps management frame preamble suppression: 0 = this phy will not accept management frames with preamble suppressed. 5 auto-negotiation complete 0, ro auto-negotiation completion: 1 = auto-negotiation process completed 0 = auto-negotiation process not completed 4 remote fault (not supported) 0, ro / lh remote fault: 1 = remote fault condition detected (cleared on read or by a chip reset) 0 = no remote fault condition detected 3 auto-negotiation ability 1, ro / ps auto configuration ability: 1 = this phy is able to perform auto-negotiation. 2 link status 0, ro / ll link status: 1 = valid link established (100mb/s or 10mb/s operation) 0 = link not established 1 jabber detect 0, ro / lh jabber detection: 1 = jabber condition detected 0 = no jabber condition detected 0 extended capability 1, ro / ps extended capability: 1 = extended register capable 0 = basic register capable only
asix electronics corporation 31 AX88772 usb to 10/100 fast ethernet/homepna controller 7.1.3 phy identifier register 1 address 02h bit bit name default description 15:0 oui_msb 003b hex, ro / ps oui most significant bits: bits 3 to 18 of the oui are mapped to bits 15 to 0 of this register respectively. the most significant two bits of the oui are ignored. 7.1.4 phy identifier register 2 address 03h bit bit name default description 15:10 oui_lsb 00_0110, ro / ps oui least significant bits: bits 19 to 24 of the oui are mapped to bits 15 to 10 of this register respectively. 9:4 vndr_mdl 00_0001, ro / ps vendor model number. 3:0 mdl_rev 0001, ro / ps model revision number. 7.1.5 auto negotiation advertisement register (anar) address 04h bit bit name default description 15 np 0, ro / ps next page indication: 0 = no next page available the phy does not support the next page function. 14 ack 0, ro acknowledgement: 1 = link partner ability da ta reception acknowledged 0 = not acknowledged 13 rf 0, rw remote fault: 1 = fault condition detected and advertised 0 = no fault detected 12:11 reserved x, rw reserved: write as 0, read as ?don?t care?. 10 pause 0, rw pause: 1 = pause operation enabled for full-duplex links 0 = pause operation not enabled 9 t4 0, ro/ps 100base-t4 support: 0 = 100base-t4 not supported 8 tx_fd 1, rw 100base-tx full-duplex support: 1 = 100base-tx full-duplex supported by this device 0 = 100base-tx full-duplex not supported by this device 7 tx_hd 1, rw 100base-tx half-duplex support: 1 = 100base-tx half-duplex supported by this device 0 = 100base-tx half-duplex not supported by this device 6 10_fd 1, rw 10base-t full-duplex support: 1 = 10base-t full-duplex supported by this phy 0 = 10base-t full-duplex not supported by this phy 5 10_hd 1, rw 10base-t half-duplex support: 1 = 10base-t half-duplex supported by this phy 0 = 10base-t half-duplex not supported by this phy 4:0 selector 0_0001, rw protocol selection bits: these bits contain the binary encoded protocol selector supported by this phy. [0 0001] indicates that this phy supports ieee 802.3u csma/cd.
asix electronics corporation 32 AX88772 usb to 10/100 fast ethernet/homepna controller 7.1.6 auto negotiation link part ner ability register (anlpar) address 05h bit bit name default description 15 np 0, ro next page indication: 1 = link partner next page enabled 0 = link partner not next page enabled 14 ack 0, ro acknowledgement: 1 = link partner ability for recep tion of data word acknowledged 0 = not acknowledged 13 rf 0, ro remote fault: 1 = remote fault indicated by link partner 0 = no remote fault indicated by link partner 12:11 reserved x, ro reserved: write as 0, read as ?don?t care?. 10 pause 0, ro pause: 1 = pause operation supported by link partner 0 = pause operation not supported by link partner 9 t4 0, ro 100base-t4 support: 1 = 100base-t4 supported by link partner 0 = 100base-t4 not supported by link partner 8 tx_fd 0, ro 100base-tx full-duplex support: 1 = 100base-tx full-duplex supported by link partner 0 = 100base-tx full-duplex not supported by link partner 7 tx_hd 0, ro 100base-tx half-duplex support: 1 = 100base-tx half-duplex supported by link partner 0 = 100base-tx half-duplex not supported by link partner 6 10_fd 0, ro 10base-t full-duplex support: 1 = 10base-t full-duplex supported by link partner 0 = 10base-t full-duplex not supported by link partner 5 10_hd 0, ro 10base-t half-duplex support: 1 = 10base-t half-duplex supported by link partner 0 = 10base-t half-duplex not supported by link partner 4:0 selector 0_0000, ro protocol selection bits: link partner?s binary encoded protocol selector. 7.1.7 auto negotiation expansion register (aner) address 06h bit bit name default description 15:5 reserved 0, ro reserved: write as 0, read as ?don?t care?. 4 pdf 0, ro / lh parallel detection fault: 1 = fault detected via the parallel detection function 0 = no fault detected 3 lp_np_ab 0, ro link partner next page enable: 1 = link partner next page enabled 0 = link partner not next page enabled 2 np_ab 0, ro / ps phy next page enable: 0 = phy not next page enabled 1 page_rx 0, ro / lh new page reception: 1 = new page received 0 = new page not received 0 lp_an_ab 0, ro link partner auto-negotiation enable: 1 = auto-negotiation supported by link partner
asix electronics corporation 33 AX88772 usb to 10/100 fast ethernet/homepna controller 8.0 electrical specifications 8.1 dc characteristics 8.1.1 absolute maximum ratings symbol parameter rating unit vddk digital core power supply - 0.3 to vddk + 0.3 v vdd2 power supply of 2.5v i/o - 0.3 to vdd2 + 0.3 v vdd3 power supply of 3.3v i/o - 0.5 to vdd3 + 0.5 v avddk analog core power supply - 0.3 to avddk + 0.3 v avdd3 power supply of analog i/o - 0.5 to avdd3 + 0.5 v input voltage of 2.5v i/o - 0.3 to vdd2 + 0.3 v v in2 input voltage of 2.5v i/o with 3.3v tolerant - 0.3 to 3.9 v input voltage of 3.3v i/o - 0.3 to vdd3 + 0.3 v v in3 input voltage of 3.3v i/o with 5v tolerant - 0.3 to 5.5 v t stg storage temperature - 40 to 150 note: permanent device damage may occu r if absolute maximum ratings are exceeded. functional operation should be restricted in the optional sections of this datasheet. exposure to absolute ma ximum rating condition for extended periods may affect device reliability. 8.1.2 recommended operating condition symbol parameter min typ max unit vddk digital core power supply 2.25 2.5 2.75 v vdd2 power supply of 2.5v i/o 2.25 2.5 2.75 v vdd3 power supply of 3.3v i/o 3.0 3.3 3.6 v avddk analog core power supply 2.25 2.5 2.75 v avdd3 power supply of analog i/o 3.0 3.3 3.6 v input voltage of 2.5 v i/o 0 2.5 2.75 v v in2 input voltage of 2.5 v i/o with 3.3 v tolerance 0 2.5 3.6 v input voltage of 3.3 v i/o 0 3.3 3.6 v v in3 input voltage of 3.3 v i/o with 5 v tolerance 0 3.3 5.25 v t j commercial junction operating temperature 0 - 115 t c commercial operating temperature 0 - 70
asix electronics corporation 34 AX88772 usb to 10/100 fast ethernet/homepna controller 8.1.3 leakage current and capacitance symbol parameter condition min typ max unit i in input current no pull-up or pull-down -10 1 10 a i oz tri-state leakage current -10 1 10 a c in input capacitance - 3.1 - pf c out output capacitance - 3.1 - pf c bid bi-directional buffer capacitance - 3.1 - pf note: the capacitance listed above does not include pad cap acitance and package capacitance. one can estimate pin capacitance by adding a pad capacitance of about 0.5pf and the package capacitance. 8.1.4 dc characteristics of 2.5v i/o pins symbol parameter condition min typ max unit vdd2 power supply of 2.5v i/o 2.25 2.5 2.75 v temp junction temperature 0 25 115 vil input low voltage - - 0.7 v vih input high voltage cmos 1.7 - - v vt- schmitt trigger negative going threshold voltage 0.7 1.0 - v vt+ schmitt trigger positive going threshold voltage cmos - 1.5 1.7 v vol output low voltage |iol| = 2~16ma - - 0.4 v voh output high voltage |ioh| = 2~16ma 1.85 - - v rpu input pull-up resistance 40 75 190 k rpd input pull-down resistance 40 75 190 k iin input leakage current vin = vdd2 or 0 -10 1 10 a ioz tri-state output leakage current -10 1 10 a 8.1.5 dc characteristics of 3.3v i/o pins symbol parameter condition min typ max unit vdd3 power supply of 3.3v i/o 3.3v i/o 3.0 3.3 3.6 v temp junction temperature 0 25 115 vil input low voltage - - 0.8 v vih input high voltage lvttl 2.0 - - v vt- schmitt trigger negative going threshold voltage 0.8 1.1 - v vt+ schmitt trigger positive going threshold voltage lvttl - 1.6 2.0 v vol output low voltage |iol| = 2~16ma - - 0.4 v voh output high voltage |ioh| = 2~16ma 2.4 - - v rpu input pull-up resistance 40 75 190 k rpd input pull-down resistance 40 75 190 k iin input leakage current vin = vdd3 or 0 -10 1 10 a ioz tri-state output leakage current -10 1 10 a
asix electronics corporation 35 AX88772 usb to 10/100 fast ethernet/homepna controller 8.2 power consumption 8.2.1 internal phy symbol description condition min typ max units i vddk2 current consumption of vddk/vdd2, 2.5v - 25.4 - ma i vdd3 current consumption of vdd3, 3.3v - < 1 - ma i avddk current consumption of avddk, 2.5v - 69.3 - ma i avdd3 current consumption of avdd3, 3.3v operating at ethernet 100mbps full duplex mode and usb high speed mode - 51.1 - ma jc thermal resistance of junction to case 16.5 c/w ja thermal resistance of junction to ambient still air 46 c/w 8.2.2 operating through mii interfa ce with internal ethernet phy power-down symbol description condition min typ max units i vddk2 current consumption of vddk/vdd2, 2.5v - 25.4 - ma i vdd3 current consumption of vdd3, 3.3v - < 1 - ma i avddk current consumption of avddk, 2.5v - < 2 - ma i avdd3 current consumption of avdd3, 3.3v operating in ethernet 100mbps full duplex mode through mii interface and in usb high speed mode. the embedded ethernet phy is powered down b y ippd bit in software reset register - 51.1 - ma 8.3 power-up sequence at power-up, AX88772 requires the vdd3/avdd3 power supply to rise to nominal operating voltage within trise3 and the vddk/avdd2/avddk power supply to rise to nominal operating voltage within trise2. symbol parameter condition min typ max unit t rise3 3.3v power supply rise time from 0v to 3.3v - - 10 ms t rise2 2.5v power supply rise time from 0v to 2.5v - - 10 ms t delay32 3.3v rise to 2.5v rise time delay -5 - 5 ms 0v 3.3v trise3 0v 2.5v trise2 tdelay32 vddk/vdd2/avddk vdd3/avdd3
asix electronics corporation 36 AX88772 usb to 10/100 fast ethernet/homepna controller 8.4 ac timing characteristics 8.4.1 clock timing 8.4.1.1 xin12m t p_xin12m t h_xin12m t l_xin12m t r_xin12m t f_xin12m symbol parameter condition min typ max unit t p_xin12m xin12m clock cycle time - 83.33 - ns t h_xin12m xin12m clock high time - 41.6 - ns t l_xin12m xin12m clock low time - 41.6 - ns t r_xin12m xin12m rise time v il (max) to v ih (min) - - 1.0 ns t f_xin12m xin12m fall time v ih (min) to v il (max) - - 1.0 ns 8.4.1.2 xin25m t p_xin25m t h_xin25m t l_xin25m t r_xin25m t f_xin25m symbol parameter condition min typ max unit t p_xin25m xin25m clock cycle time - 40.0 - ns t h_xin25m xin25m clock high time - 20.0 - ns t l_xin25m xin25m clock low time - 20.0 - ns t r_xin25m xin25m rise time v il (max) to v ih (min) - - 1.0 ns t f_xin25m xin25m fall time v ih (min) to v il (max) - - 1.0 ns v ih v il v ih v il
asix electronics corporation 37 AX88772 usb to 10/100 fast ethernet/homepna controller 8.4.2 reset timing xin12m reset_n symbol description min typ max units trst reset pulse width (6ms ~10ms) after xin12m is running 72000 - - xin12m clock cycle 8.4.3 mii timing (100mbps) ttclk ttch ttcl tx_clk tts tth txd [3:0] tx_en, tx_er symbol description min typ max units ttclk tx_clk clock cycle time *1 - 40.0 - ns ttch tx_clk clock high time *2 - 20.0 - ns ttcl tx_clk clock low time *2 - 20.0 - ns tts txd [3:0], tx_en, tx_er setup time 28.0 - - ns tth txd [3:0], tx_en, tx_er hold time 5.0 - - ns trclk trch trcl rx_clk trs trh rxd [3:0] rx_dv, rx_er symbol description min typ max units trclk rx_clk clock cycle time *1 - 40.0 - ns trch rx_clk clock high time *2 - 20.0 - ns trcl rx_clk clock low time *2 - 20.0 - ns trs rxd [3:0], rx_dv, and rx_er setup time 3.0 - - ns trh rxd [3:0], rx_dv, and rx_er hold time 0.5 - - ns *1: for 10mbps, the typical value of ttclk and trclk shall scale to 400ns. *2: for 10mbps, the typical value of ttch, ttcl, trch, and trcl shall scale to 200ns. trs t
asix electronics corporation 38 AX88772 usb to 10/100 fast ethernet/homepna controller 8.4.4 station management timing mdc mdio (as output) mdio (as input) symbol description min typ max units tclk mdc clock cycle time - 666 - ns tch mdc clock high time - 333 - ns tcl mdc clock low time - 333 - ns tod mdc clock falling edge to mdio output delay 0 - 2 ns ts mdio data input setup time 10 - - ns th mdio data input hold time 0 - - ns 8.4.5 serial eeprom timing eeck eedi (output) eecs eedo (input) symbol description min typ max units tclk eeck clock cycle time - 5333 - ns tch eeck clock high time - 2666 - ns tcl eeck clock low time - 2666 - ns tdv eedi output valid to eeck rising edge time 2666 - - ns tod eeck rising edge to eedi output delay time 2666 - - ns tscs eecs output valid to eeck rising edge time 2666 - - ns thcs eeck falling edge to eecs invalid time 0 - - ns tlcs minimum eecs low time 23904 - - ns ts eedo input setup time 20 - - ns th eedo input hold time 10 - - ns tch tclk tcl valid valid tdv tod tscs thcs tlcs th data valid ts tod tcl k ts th tch tcl
asix electronics corporation 39 AX88772 usb to 10/100 fast ethernet/homepna controller 9.0 package information b e d hd e he pin 1 a2 a1 l l1 a millimeter symbol min typ max a1 0.05 - - a2 1.35 1.40 1.45 a - - 1.60 b 0.13 0.18 0.23 d 13.90 14.00 14.10 e 13.90 14.00 14.10 e - 0.4 bsc - hd 15.85 16.00 16.15 he 15.85 16.00 16.15 l 0.45 0.60 0.75 l1 - 1.00 ref - 0 3.5 7
asix electronics corporation 40 AX88772 usb to 10/100 fast ethernet/homepna controller 10.0 ordering information AX88772 l f product name package lqfp lead free
asix electronics corporation 41 AX88772 usb to 10/100 fast ethernet/homepna controller appendix a: system applications some typical applications fo r AX88772 are illustrated bellow. a.1 usb to fast ethernet converter a.2 usb to fast ethernet and/or homelan combo solution AX88772 magnetic rj45 usb i/f eeprom home lan phy magnetic rj11 AX88772 magnetic rj45 usb i/f eeprom 10/100 ethernet phy magnetic rj45 current driver do not support for this current driver do not support for this
asix electronics corporation 42 AX88772 usb to 10/100 fast ethernet/homepna controller revision history revision date comment v 0.1 1/5/04 initial release. v 0.2 4/16/04 added power consumption da ta and updated pin description for pin usb_speed_led. v 0.3 8/9/04 changed bulk in transfer to endpoint 2 and bulk out transfer to endpoint 3 in section 5.3. v 0.4 12/23/04 added thermal data in section 8.2. v 0.5 1/6/05 added operating temperature in feature and section 8.1.2. v 0.6 3/23/05 added power-up sequence in section 8.3. v 0.7 6/21/05 changed the support to 1 usb interface in section 5.2. v 1.0 9/15/06 1. added the power consumption of mac to mac application through mii interface in section 8.2.2. 2. correct the eedo input setup and hold time information in section 8.4.5. v1.1 4/24/07 1. added suggested operati ng frequency range for xin12m pin in section 2.0. 2. swaped pin name xin25m and xout25m in section 2.0 and figure 2. corrected xin25m/xout 25m to 2.5v tolerant pin. 3. added mii mac-to-mac connection diagram in section 3.9. 4. removed usb v1.0 from datasheet.
asix electronics corporation 43 AX88772 usb to 10/100 fast ethernet/homepna controller 4f, no. 8, hsin ann rd., science-based industrial park, hsinchu, taiwan, r.o.c. tel: 886-3-5799500 fax: 886-3-5799558 email: support@asix.com.tw web: http://www.asix.com.tw

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