PT6312_10 Datasheet, PDF (5/21 Pages) Princeton Technology Corp – VFD Driver/Controller IC

Tel: [phone]
Fax: [phone]
URL: http://www.princeton.com.tw
VFD Driver/Controller IC
PT6312
FUNCTION DESCRIPTION
COMMANDS
Commands determine the display mode and status of PT6312. A command is the first byte (b0 to b7)
inputted to PT6312 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
PT6312 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 PT6312 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 number of segments and grids to be used (1/4 to
1/11 duty, 11 to 16 segments). When these commands are executed, the display is forcibly turned off,
the key scanning stops. A display “ON” command 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 11-digit, 11-segment modes is selected.
MSB
LSB
0 0 - - - b2 b1 b0
Not relevant
Display mode settings:
000: 4 digits, 16 segments
001: 5 digits, 16 segments
010: 6 digits, 16 segments
011: 7 digits, 15 segments
100: 8 digits, 14 segments
101: 9 digits, 13 segments
110: 10 digits, 12 segments
111: 11 digits, 11 segments
PT6312 V2.6
-5-
December, 2005