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VFD Driver/Controller IC
PT6315
PT6315 v2.0
Page 14
Sep. 2002
SERIAL COMMUNICATION FORMAT
The following diagram shows the PT6315 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 (1 KOhms to 10 KOhms)
must be connected to DOUT.
Figure 13: PT6315 Serial Communication Format
where: t
wait
(waiting time) > 1us
It must be noted that when the data is read, the waiting time (t
wait
) 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.
b0
b1
b2
b3
b4
b5
