PT6963 Datasheet, PDF (6/17 Pages) Princeton Technology Corp – LED Driver IC

PT6963
FUNCTION DESCRIPTION
COMMANDS
A command is the first byte (b0 to b7) inputted to PT6963 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.
COMMANDS 1: DISPLAY MODE SETTING COMMANDS
PT6963 provides 4 display mode settings as shown in the diagram below: As stated earlier a command is the first one
byte (b0 to b7) transmitted to PT6963 via the DIN Pin when STB is LOW. However, for these commands, the bit 3 & bit
8 (b2 to b7) are given a value of 0.
The Display Mode Setting Commands determine the number of segments and grids to be used (14 to 11 segments, 4 to
7 grids). 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 7-grid, 11-segment modes is selected.
MSB
LSB
0 0 0 0 0 0 b1 b0
Display Mode Settings:
00: 4 digits, 14 segments
01: 5 digits, 13 segments
10: 6 digits, 12 segments
11: 7 digits, 11 segments
COMMANDS 2: DATA SETTING COMMANDS
The Data Setting Commands executes the Data Write or Data Read Modes for PT6963. The data
Setting Command, the bits 5 and 6 (b4, b5) are given the value of 0, 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, bit 4 to bit 1 (b3 to b0) are given the value of 0.
MSB
LSB
0 1 0 0 b3 b2 b1 b0
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
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