tel: 886-2-66296288 fax: 886-2-29174598 url: http://www.princeton.com.tw PT6312B v1.1 - 1 - january, 2004 vfd driver/controller ic PT6312B description PT6312B is a vacuum fluorescent display (vfd) c ontroller driven on a 1/4 to 1/11 duty factor. eleven segment output lines, 6 grid output lines, 5 segm ent/grid output drive lines, one display memory, control circuit, key scan circuit are all incorporated in to a single chip to build a highly reliable peripheral device for a single chip micro comput er. serial data is fed to PT6312B via a three-line serial interface. it is housed in a 44-pin plastic lqfp package and is functionally compatible with pd16312. features ? cmos technology ? low power consumption ? key scanning (6 x 4 matrix) ? multiple display modes: (11 segments, 11 digits to 16 segments, 6 digits) ? 8-step dimming circuitry ? led ports provided (4 channels, 20 ma max.) ? 4- bits general purpose input ports provided ? serial interface for clock, data input, data output, strobe pins ? no external resistors needed for driver outputs ? functional compatibility with pd16312 ? available in 44-pin, lqfp package applications ? microcomputer peripheral devices
tel: 886-2-66296288 fax: 886-2-29174598 url: http://www.princeton.com.tw PT6312B v1.1 - 2 - january, 2004 vfd driver/controller ic PT6312B pin configuration PT6312B
tel: 886-2-66296288 fax: 886-2-29174598 url: http://www.princeton.com.tw PT6312B v1.1 - 3 - january, 2004 vfd driver/controller ic PT6312B 6-grid x 6-segment vfd application circuit g 3 g 2 g 1 g 4 s 1 1 s 1 0 s 9 s 8 s 7 s 6 s 5 s 4 s 3 s 2 s 1 s 1 2 6-grid x 16-segment vfd -24v in4148 x 6 51k +5v /+3.3v PT6312B mcu +5v /+3.3v 10k 1 2 3 4 5 6 7 8 9 10 11 1 2 1 3 24 25 3 8 3 9 4 4 4 3 4 2 4 1 4 0 1 4 1 5 1 6 1 7 1 8 1 9 2 0 2 1 2 2 26 220 220 220 220 10k 10k +5v/ +3.3v s 1 4 s 1 3 s 1 5 s 1 6 g5 g6 33 32 31 30 29 28 27 23 3 7 3 6 3 5 3 4 10k 10k 10k 10k 10k 10k 10k 0.1uf order information valid part number package type top code PT6312Blq 44-pin, lqfp PT6312Blq
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