Oki ML63611, User Manual

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ML63611 User’s Manual
Chapter 12 Serial Port (SIO)
12 – 17
OPTION B (D): 1.5 V (3.0 V), With regulator
circuit for LCD bias
OPTION A (C): 1.5 V (3.0 V), Without regulator
circuit for LCD bias
(3) Synchronous external clock mode
The synchronous external clock mode is selected by setting STMOD (bit 0 of STCON0) to “1”, and STCLK
(bit 0 of STCON1) to “0”.
Figure 12-7 is the send timing chart for the synchronous external clock mode.
The synchronous external clock send procedure is described below.
First set the send format (data bit length, parity bit, etc.) to STCON0 and STCON1.
①
Set send data to STBUFL/H.
②
The send data is transferred from STBUFL/H to the send register, and at the same time the interrupt
request signal (STINT) is generated.
③
Send operation is started by the send shift clock (TXCI).
④
Check that BFULL = “0”, then set the next send data to STBUFL/H.
⑤
When the send operation is complete, the send data set to STBUFL/H is transferred to the send register.
At the same time, the serial port send interrupt signal (STINT) is generated.
Repeat step
④
the required number of times.
In the synchronous external clock mode the send baud rate is determined by the input shift clock (TXCI).
To send data continuously, keep an interval of at least 3.5 clocks (approx. 107 µs) of TBCCLK for one frame
of clocked (TXCI) send data.