PT6547 Datasheet, PDF (15/35 Pages) Princeton Technology Corp – LCD Driver IC with Key Input Function

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LCD Driver IC with Key Input Function
PT6547
SERIAL COMMUNICATION FORMAT
The following diagram shows the PT6547 serial communication format. The DOUT pin is an N-channel,
open-drain output pin, therefore, it is highly recommended that an external pull-up resistor (1KΩ to
10KΩ) must be connected to DOUT.
RECEPTION (DATA/COMMAND WRITE)
If data continues
STB
DIN
b0
b1
b2
b6
b7
CLK
1
2
3
7
8
TRANSMISSION (DATA READ)
STB
DIN
b0 b1 b2 b3 b4 b5 b6 b7
CLK
DOUT
123456 78
t _wait
1 2 34 5 6
b0 b1 b2 b3 b4 b5
Data Read Command is set
Data Reading starts
where: twait (waiting time) ≥ 1µs
It must be noted that when the data is read, the waiting 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 1µs.
PT6547 V1.2
- 15 -
January, 2006