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tel: 886-2-66296288 fax: 886-2-29174598 url: http://www.princeton.com.tw PT6313-S v1.2 - 1 - september, 2005 vfd driver/controller ic PT6313-S description PT6313-S is a vacuum fluorescent display (vfd) cont roller driven on a 1/4 to 1/8 duty factor. eight segment output lines, 4 grid output lines, 4 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 computer. serial data is fed to PT6313-S via a three-line serial interface. it is housed in a 28pins, sop. features ? cmos technology ? low power consumption ? key scanning (8 x 2 matrix) ? multiple display modes: (8 segments, 8 digits to 12 segments, 4 digits) ? 8-step dimming circuitry ? serial interface for clock, data input, data output, strobe pins ? no external resistors needed for driver outputs ? available in 28pins, sop application ? microcomputer peripheral devices
tel: 886-2-66296288 fax: 886-2-29174598 url: http://www.princeton.com.tw PT6313-S v1.2 - 2 - september, 2005 vfd driver/controller ic PT6313-S block diagram sg1/ks1 sg2/ks2 sg3/ks3 sg4/ks4 sg5/ks5 sg6/ks6 sg7/ks7 sg8/ks8 sg9/gr8 sg10/gr7 sg11/gr6 gr1 gr2 gr3 gr4 vee g nd vdd k2 k1 osc r din dout clk stb serial data interface control display memory timing generator key matrix memory segment driver/ grid driver/ key scan output grid driver dimming circuit osc sg12/gr 5
tel: 886-2-66296288 fax: 886-2-29174598 url: http://www.princeton.com.tw PT6313-S v1.2 - 3 - september, 2005 vfd driver/controller ic PT6313-S pin configuration vee 1 3 2 5 4 8 7 6 10 9 12 11 PT6313-S 28 26 27 24 25 21 22 23 19 20 17 18 14 13 15 16 clk stb k1 k2 vss vdd sg1/ks1 sg2/ks2 sg3/ks3 sg4/ks4 sg5/ks5 sg6/ks6 sg7/ks7 sg8/ks8 sg9/gr8 sg10/gr7 din dout osc vss vdd gr1 gr2 gr3 gr4 sg12/gr5 sg11/gr6
tel: 886-2-66296288 fax: 886-2-29174598 url: http://www.princeton.com.tw PT6313-S v1.2 - 4 - september, 2005 vfd driver/controller ic PT6313-S pin description pin name i/o description pin no. clk i clock input pin this pin reads serial data at the rising edge and outputs data at the falling edge. 1 stb i serial interface strobe pin the data input after the stb has fallen is processed as a command. when this in is ?high?, clk is ignored. 2 k1 to k2 i key data input pins the data inputted to these pins is latched at the end of the display cycle. 3, 4 vss - logic ground pin 5, 25 vdd - logic power supply 6, 24 sg1/ks1 to sg8/ks8 o high-voltage segment output pins also acts as the key source. 7 to 14 vee - pull-down level 15 sg9/gr8 to sg12/gr5 o high-voltage segment output pins 16 to 19 gr4 to gr1 o high-voltage grid output pins 20 to 23 osc i oscillator input pin a resistor is connected to this pin to determine the oscillation frequency. 26 dout o data output pin (n-channel, open-drain) this pin outputs serial data at the falling edge of the shift clock (starting from the lower bit). 27 din i data input pin this pin inputs serial data at the rising edge of the shift clock (starting from the lower bit). 28
tel: 886-2-66296288 fax: 886-2-29174598 url: http://www.princeton.com.tw PT6313-S v1.2 - 5 - september, 2005 vfd driver/controller ic PT6313-S function description commands commands determine the display mode and status of PT6313-S. a command is the first byte (b0 to b7) inputted to PT6313-S via the din pin after stb pin has changed from ?high? to ?low? state. if for some reason the stb pin is set to ?high? while data or commands are being transmitted, the serial communication is initialized, and the data/comm ands being transmitted are considered invalid. command 1: display mode setting commands PT6313-S provides 4 display mode settings as s hown in the diagram below: as stated earlier a command is the first one byte (b0 to b7) transmitt ed to PT6313-S via the din pin when stb is ?low?. however, for these commands, the bits 4 to 6 (b3 to b5) are ignored, bits 7 & 8 (b6 to b7) are given a value of ?0?. the display mode setting commands determine the num ber of segments and grid s to be used (1/4 to 1/8 duty, 12 to 8 segments). when power is turned ?on?, the 8-di git, 8-segment mode is selected. msb lsb 0 0 - - - b2 b1 b0 not relevant display mode settings: 000: 4 digits, 12 segments 001: 5 digits, 11 segments 010: 6 digits, 10 segments 011: 7 digits, 9 segments 100: 8 digits, 8 segments
tel: 886-2-66296288 fax: 886-2-29174598 url: http://www.princeton.com.tw PT6313-S v1.2 - 6 - september, 2005 vfd driver/controller ic PT6313-S display mode and ram address data transmitted from an external device to PT6313-S via the serial in terface are stored in the display ram and are assigned addresses. the ram addresses of PT6313-S are given below in 8 bits unit. sg1 sg4 sg5 sg8 sg9 sg12 00hl 00hu 01hl dig1 02hl 02hu 03hl dig2 04hl 04hu 05hl dig3 06hl 06hu 07hl dig4 08hl 08hu 09hl dig5 0ahl 0ahu 0bhl dig6 0chl 0chu 0dhl dig7 0ehl 0ehu 0fhl dig8 - b0 b3 b4 b7 xxhl xxhu lower 4 bits higher 4 bits
tel: 886-2-66296288 fax: 886-2-29174598 url: http://www.princeton.com.tw PT6313-S v1.2 - 7 - september, 2005 vfd driver/controller ic PT6313-S command 2: data setting commands the data setting commands executes the data wr ite or data read modes for PT6313-S. the data setting command, the bits 5 and 6 (b4, b5) are ignored, bit 7 (b6) is given the value of ?1? while bit 8 (b7) is given the value of ?0?. please refer to the diagram below. when power is turned on, the bit 4 to bit 1 (b3 to b0) are given the value of ?0?. msb lsb 0 1 - - b3 b2 b1 b0 not relevant data write & read mode settings: 00: write data to display mode 10: read key data address increment mode settings (display mode): 0: increment address after data has been written 1: fixed address mode settings: 0: normal operation mode 1: test mode
tel: 886-2-66296288 fax: 886-2-29174598 url: http://www.princeton.com.tw PT6313-S v1.2 - 8 - september, 2005 vfd driver/controller ic PT6313-S PT6313-S key matrix & key input data storage ram PT6313-S key matrix consists of 8 x 2 array as shown below: k1 k2 sg1/ks1 sg2/ks2 sg3/ks3 sg4/ks4 sg5/ks5 sg6/ks6 sg7/ks7 sg8/ks8 each data inputted by each key are stored as follo ws. they are read by a read command, starting from the last significant bit. when the most signific ant bit of the data (sg8, b7) has been read, the least significant bit of the next data (sg1, b0) is read. k1????k1 k2????k3 k4????k5 k6?????k7 sg1/ks1 sg2/ks2 sg3/ks3 sg4/ks4 sg5/ks5 sg6/ks6 sg7/ks7 sg8/ks8 b0????.b1 b2????.b3 b4????.b5 b6?????.b7 reading sequence
tel: 886-2-66296288 fax: 886-2-29174598 url: http://www.princeton.com.tw PT6313-S v1.2 - 9 - september, 2005 vfd driver/controller ic PT6313-S command 3: address setting commands address setting commands are used to set the address of the display memory. the address is considered valid if it has a value of ?00h? to ?0fh ?. if the address is set to 10h or higher, the data is ignored until a valid address is set. when power is turned on, the address is set at ?00h?. please refer to the diagram below. msb lsb 1 1 0 0 b3 b2 b1 b0 address: 00h to 0fh command 4: display control commands the display control commands are used to turn on or off a display. it also used to set the pulse width. please refer to the diagram below. when the power is turned on, a 1/16 pulse width is selected and the displayed is turned off. msb lsb 1 0 - - b3 b2 b1 b0 not relevant dimming quantity settings: 000: pulse width = 1/16 001: pulse width = 2/16 010: pulse width = 4/16 011: pulse width = 10/16 100: pulse width ? 11/16 101: pulse width = 12/16 110: pulse width = 13/16 111: pulse width = 14/16 display settings: 0: display off 1: display on
tel: 886-2-66296288 fax: 886-2-29174598 url: http://www.princeton.com.tw PT6313-S v1.2 - 10 - september, 2005 vfd driver/controller ic PT6313-S scanning and display timing the key scanning and display timing diagr am is given below. the data of the 8 x 2 matrix is stored in the ram. t=500 s display g1 g2 g3 sg output dig1 dig2 dig3 dign dig1 key scan data gn 1 frame = t x ( n +1 ) display 12 8
tel: 886-2-66296288 fax: 886-2-29174598 url: http://www.princeton.com.tw PT6313-S v1.2 - 11 - september, 2005 vfd driver/controller ic PT6313-S serial communication format the following diagram shows the PT6313-S serial communication format. the dout pin is an n-channel, open-drain output pin; ther efore, it is highly recommended t hat an external pull-up resistor (1k ? to 10k ? ) must be connected to dout. stb din clk stb din clk dout if data continues b0 b1 b2 b6 b7 b0 b1 b2 b3 b4 b5 b6 b7 12 378 12 3 4 5 678 12 3 4 5 6 b0 b1 b2 b3 b4 b5 data read command is set data reading starts t wait reception ( data /c ommand write ) transmission (data read) where: twait (waiting time) > 1s it must be noted that when the data is read, the wait ing time (twait) between the rising of the eighth clock that has set the command and the falling of the first clock that has read the data is greater or equal to 1s.
tel: 886-2-66296288 fax: 886-2-29174598 url: http://www.princeton.com.tw PT6313-S v1.2 - 12 - september, 2005 vfd driver/controller ic PT6313-S switching characteristic waveform PT6313-S switching characteristics waveform is given below. osc stb clk din sn/gn 90% 10% fosc 50% pw clk pw clk t setup t ho ld pw st b t cl k- st b t tzh t thz dout t pzl t plz where: pw clk (clock pulse width) 400ns pw stb (strobe pulse width) 1s t setup (data setup time) 100ns thold (data hold time) 100ns tclk-stb (clock - strobe time) 1s tthz (fall time) 150s ttzh (grid rise time) 0.5s (vdd=5v) t pzl (propagation delay time) 100ns ttzh (grid rise time) 1.0s (vdd=3.3v) tplz (propagation delay time) 400ns ttzh (segment rise time) 2.0s (vdd=5v) ttzh (segment rise time) 3.0s (vdd=3.3v) fosc=oscillation frequency
tel: 886-2-66296288 fax: 886-2-29174598 url: http://www.princeton.com.tw PT6313-S v1.2 - 13 - september, 2005 vfd driver/controller ic PT6313-S applications display memory is updated by incrementing addre sses. please refer to the following diagram. stb clk din command 2 command 3 data 1 data n command 1 command 4 where: command 1: display mode setting command command 2: data setting command command 3: address setting command data 1 to n: transfer display data (16 bytes max.) command 4: display control command the following diagram shows the wavefo rms when updating specific addresses. stb clk din command 2 command 3 data command 3 data where: command 2: data setting command command 3: address setting command data: display data
tel: 886-2-66296288 fax: 886-2-29174598 url: http://www.princeton.com.tw PT6313-S v1.2 - 14 - september, 2005 vfd driver/controller ic PT6313-S recommended software flowchart start set command 2 (write data) set command 2 (read key & write data included) set command 3 end initial setting main loop set command 3 clear display ram (see note 5) set command 1 main program set command 4 set command 4 (88h~8fh: display on) delay 200 ms set command 1 note: 1. command 1: display mode commands 2. command 2: data setting commands 3. command 3: address setting commands 4. command 4: display control commands 5. when ic power is applied for the first time, the c ontents of the display ram ar e not defined; thus, it is strongly suggested that t he contents of the display ram must be cleared during the initial setting.
tel: 886-2-66296288 fax: 886-2-29174598 url: http://www.princeton.com.tw PT6313-S v1.2 - 15 - september, 2005 vfd driver/controller ic PT6313-S absolute maximum ratings (unless otherwise stated, ta=25 , gnd=0v) parameter symbol ratings unit logic supply voltage vdd -0.5 to +7 v driver supply voltage vee vdd +0.5 to vdd -40 v logic input voltage vi -0.5 to vdd +0.5 v vfd driver output voltage vo vee -0.5 to vdd +0.5 v vfd driver output current iovfd -40 (grid) -15 (segment) ma operating temperatur e topr -40 to +85 storage temperature tstg -65 to +150 recommended operating range (unless otherwise stated, ta=-25 , gnd=0v) ratings parameter symbol min. typ. max. unit logic supply voltage vdd 3.0 5 5.5 v high-level input voltage vih 0.7vdd - vdd v low-level input voltage vil 0 - 0.3vdd v driver supply voltage vee vdd -35 - 0 v
tel: 886-2-66296288 fax: 886-2-29174598 url: http://www.princeton.com.tw PT6313-S v1.2 - 16 - september, 2005 vfd driver/controller ic PT6313-S electrical characteristics (unless otherwise stated, vdd= 5v, gnd=0v, vee=vdd-35 v, ta=25 ) parameter symbol test condition min. typ. max. unit low-level output voltage voldout dout, ioldout=4ma - - 0.4 v high-level output current iohsg vo=vdd -2v sg1/ks1 to sg8/ks8 -3 - - ma high-level output current iohgr vo=vdd -2v gr1 to gr4, sg9/gr8 to sg12/gr5 -15 - - ma high-level input voltage vih - 0.7vdd - vdd v low-level input voltage vil - - - 0.3vdd v oscillation frequency fosc r=68k ? 350 500 650 khz input current ii vi=vdd or vss - - 1 a dynamic current consumption idddyn under no load display off - - 5 ma electrical characteristics (unless otherwise stated, vdd=3. 3v, gnd=0v, vee=vdd-35 v, ta=25 ) parameter symbol test condition min. typ. max. unit low-level output voltage voldout dout, ioldout=4ma - - 0.4 v high-level output current iohsg vo=vdd -2v sg1/ks1 to sg8/ks8 -1.5 - - ma high-level output current iohgr vo=vdd -2v gr1 to gr4, sg9/gr8 to sg12/gr5 -6 - - ma high-level input voltage vih - 0.7vdd - vdd v low-level input voltage vil - - - 0.3vdd v oscillation frequency fosc r=68k ? 350 500 650 khz input current ii vi=vdd or vss - - 1 a dynamic current consumption idddyn under no load display off - - 3 ma
tel: 886-2-66296288 fax: 886-2-29174598 url: http://www.princeton.com.tw PT6313-S v1.2 - 17 - september, 2005 vfd driver/controller ic PT6313-S application circuit din dout osc vss vdd gr1 gr2 gr3 gr4 sg12/gr5 sg11/gr6 sg10/gr7 sg9/gr8 vee clk stb k1 k2 vss vdd sg1/ks1 sg2/ks2 sg3/ks3 sg4/ks4 sg5/ks5 sg6/ks6 sg7/ks7 sg8/ks8 mcu vdd 10k 10k 1n4148 x 8 g8 g7 g6 g5 g 4 g3 g2 g1 s8 s7 s6 s5 s 4 s3 s2 s1 vee 68 k 10k vdd 8-grid x 8-segment vfd vdd 0.1 f 10 k 10 k note: the capacitor (0.1f) connected between the gnd and the vdd pins must be located as close as possible to the PT6313-S chip.
tel: 886-2-66296288 fax: 886-2-29174598 url: http://www.princeton.com.tw PT6313-S v1.2 - 18 - september, 2005 vfd driver/controller ic PT6313-S order information valid part number package type top code PT6313-S 28pins, sop, 300mil PT6313-S PT6313-S (l) 28pins, sop, 300mil PT6313-S notes: 1. (l), (c) or (s) = lead free. 2. the lead free mark is put in front of the date code.
tel: 886-2-66296288 fax: 886-2-29174598 url: http://www.princeton.com.tw PT6313-S v1.2 - 19 - september, 2005 vfd driver/controller ic PT6313-S package information 28 pins, sop, 300 mil symbol min. max a 2.35 2.65 a1 0.10 0.30 b 0.33 0.51 c 0.23 0.32 d 17.70 18.10 e 7.40 7.60 e 1.27 bsc. h 10.00 10.65 h 0.25 0.75 l 0.40 1.27 0 o 8 o
tel: 886-2-66296288 fax: 886-2-29174598 url: http://www.princeton.com.tw PT6313-S v1.2 - 20 - september, 2005 vfd driver/controller ic PT6313-S notes: 1. dimensioning and toleranc ing per ansi y14.5-1982. 2. dimension d does not include mold flash, protrusi ons or gate burrs. mold fl ash, protrusions and gate burrs shall not exceed 0.15mm (0.006 in) per side. 3. dimension e does not include inte rlead flash or protrusions. interlead flash and protrusion shall not exceed 0.15mm (0.016in) per side. 4. the chamfer on the body is optional. if it is not pres ent, a visual index feature must be located within the crosshatched area. 5. l is the length of terminal for soldering to a substrate. 6. n is the number of terminal positions (n=28). 7. the lead width b as measured 0.36mm (0.014in) or greater above the seating plane, shall not exceed a maximum value of 0.61 mm (0.024 in). 8. controlling dimension: millimeter 9. refer to jedec ms-013 variation ae. jedec is the registered trademark of je dec solid state technology association

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