PT6324

V1.5

June 2010

6

FUNCTION DESCRIPTION

COMMANDS

Commands determine the display mode and status of PT6324. A command is the first byte (b0 to b7) inputted to PT6324

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

PT6324 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 PT6324 via the DIN Pin when STB is “LOW”. However, for these commands, the bits 5 to

8 (b4 to b7) are given a value of “0”.

The Display Mode Setting Commands determine the number of segments and grids to be used (1/8 to 1/16 duty, 24

segments). When these commands are executed, the display is forcibly turned off. 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 16-digit, 24-segment modes is selected.

MSB

LSB

0

0

0

0

b3

b2

b1

b0

Display mode settings:

0000: 8 digits, 24 segments

1000: 9 digits, 24 segments

1001: 10 digits, 24 segments

1010: 11 digits, 24 segments

1011: 12 digits, 24 segments

1100: 13 digits, 24 segments

1101: 14 digits, 24 segments

1110: 15 digits, 24 segments

1111: 16 digits, 24 segments