PT6315 View Datasheet(PDF) - Princeton Technology

Part Name

Description

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PT6315

VFD Driver/Controller IC

Princeton Technology 

PT6315

FUNCTION DESCRIPTION

COMMANDS

Commands determine the display mode and status of PT6315. A command is the first byte (b0 to b7) inputted to PT6315

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/commands being

transmitted are considered invalid.

COMMAND 1: DISPLAY MODE SETTING COMMANDS

PT6315 provides 8 display mode settings as shown in the diagram below: As stated earlier a command is the first one

byte (b0 to b7) transmitted to PT6315 via the DIN Pin when STB is “LOW”. However, for these commands, the bits 5 to

6 (b4 to b5) are ignored, bits 7 & 8 (b6 to b7) are given a value of “0”.

The Display Mode Setting Commands determine the number of segments and grids to be used (1/4 to 1/12 duty, 16 to

24 segments). When these commands are executed, the display is forcibly turned off, the key scanning stops. A display

command “ON” must be executed in order to resume display. If the same mode setting is selected, no command

execution is take place, therefore, nothing happens.

When Power is turned “ON”, the 12-digit, 16-segment modes is selected.

MSB

LSB

0 0 - - b3 b2 b1 b0

Not Relevant

Display Mode Settings:

0000: 4 digits, 24 segments

0001: 5 digits, 23 segments

0010: 6 digits, 22 segments

0011: 7 digits, 21 segments

0100: 8 digits, 20 segments

0101: 9 digits, 19 segments

0110: 10 digits, 18 segments

0111: 11 digits, 17 segments

1XXX: 12 digits, 16 segments

DISPLAY MODE AND RAM ADDRESS

Data transmitted from an external device to PT6315 via the serial interface are stored in the Display RAM and are

assigned addresses. The RAM Addresses of PT6315 are given below in 8 bits unit.

SG1 SG4

00HL

03HL

06HL

09HL

0CHL

0FHL

12HL

15HL

18HL

1BHL

1EHL

21HL

SG5 SG8

00HU

03HU

06HU

09HU

0CHU

0FHU

12HU

15HU

18HU

1BHU

1EHU

21HU

SG9 SG12

01HL

04HL

07HL

0AHL

0DHL

10HL

13HL

16HL

19HL

1CHL

1FHL

22HL

SG13 SG16

01HU

04HU

07HU

0AHU

0DHU

10HU

13HU

16HU

19HU

1CHU

1FHU

22HU

SG17 SG20

02HL

05HL

08HL

0BHL

0EHL

11HL

14HL

17HL

1AHL

1DHL

20HL

23HL

SG21 SG24

02HU

05HU

08HU

0BHU

0EHU

11HU

14HU

17HU

1AHU

1DHU

20HU

23HU

DIG1

DIG2

DIG3

DIG4

DIG5

DIG6

DIG7

DIG8

DIG9

DIG10

DIG11

DIG12

V2.8

b0

b3

xxHL

Lower 4 bits

6

b4

b7

xxHU

Higher 4 bits

September, 2009

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