PT6315-S Datasheet, PDF (11/20 Pages) Princeton Technology Corp – VFD Driver/Controller IC

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VFD Driver/Controller IC
PT6315-S
SERIAL COMMUNICATION FORMAT
The following diagram shows the PT6315-S 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
CLK
DOUT
b0 b1 b2 b3 b4 b5 b6 b7
1
2
34
56
7
8
t wait
1 234 56
b0 b1 b2 b3 b4 b5
Data Read Com m and 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.
PT6315-S V1.9
- 11 -
September, 2005