princeton technology corp. tel : 886-2-29162151 fax: 886-2-29174598 vfd driver/controller ic pt6315 pt6315 v1.7 page 1 updated december 2001 description pt6315 is a vacuum fluorescent display (vfd) controller driven on a 1/4 to 1/12 duty factor. sixteen segment output lines, 4 grid output lines, 8 segment/grid output drive lines, one display memory, control circuit, key scan circuit are all incorporated into a single chip to build a highly reliable peripheral device for a single chip micro computer. serial data is fed to pt6315 via a three-line serial interface. it is housed in a 44-pin, lqfp package. fea tures ? cmos technology ? low power consumption ? key scanning (16 x 2 matrix) ? multiple display modes: (16 segments, 12 digits to 24 segments, 4 digits) ? 8-step dimming circuitry ? led ports provided (4 channels, 20 ma max.) ? serial interface for clock, data input, data output, strobe pins ? no external resistors needed for driver outputs ? available in 44-pin, lqfp package applica tion ? microcomputer peripheral device
princeton technology corp. tel : 886-2-29162151 fax: 886-2-29174598 vfd driver/controller ic pt6315 pt6315 v1.7 page 3 updated december 2001 pin configura tion figure 2: pt6315 pin configuration sg24/gr5 sg23/gr6 sg22/gr7 sg21/gr8 sg20/gr9 led1 led2 led3 led4 osc dout din clk stb k1 k2 sg19/gr10 sg18/gr11 sg17/gr12 vee sg16/ks16 sg15/ks15 sg14/ks14 sg13/ks13 sg12/ks12 sg11/ks11 sg10/ks10 vss vdd sg1/ks1 sg2/ks2 sg3/ks3 sg4/ks4 sg5/ks5 sg6/ks6 sg7/ks7 sg8/ks8 sg9/ks9 vss vdd gr1 gr2 gr3 gr4
princeton technology corp. tel : 886-2-29162151 fax: 886-2-29174598 vfd driver/controller ic pt6315 pt6315 v1.7 page 20 updated december 2001 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 mcu vcc s19 s18 s17 s16 s15 s14 s13 s12 s11 s10 s9 s8 s7 s6 s5 s4 s3 s2 s1 g9 g8 g7 g6 g5 g4 g3 g2 g2 g1 9-grid x 19-segment vfd 10k 330 330 330 330 82k vcc -vee 10k 10k pt6315 vcc 1n4148 x 16 applica tion circuit figure 18: pt6315 applicaiton circuit
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