Renesas RL78/G1P Hardware User Manual page 442

RL78/G1P
Figure 11-93. Procedure for Stopping Slave Transmission/Reception
Starting setting to stop
(Selective)
(Essential)
Writing the STm register
Changing setting of the
(Essential)
SOEm register
Changing setting of the
(Selective)
SOm register
(Selective)
Setting the PER0 register
Stop setting is completed
Remark m: Unit number (m = 0), n: Channel number (n = 0), p: CSI number (p = 00)
R01UH0895EJ0100 Rev.1.00
Nov 29, 2019
No
TSFmn = 0?
Yes
CHAPTER 11 SERIAL ARRAY UNIT
If there is any data being transferred,
wait for their completion.
(If there is an urgent must stop, do not wait.)
Write 1 to the STmn bit of the target channel.
(SEmn = 0: to operation stop status)
Set the SOEmn bit to 0 and stop the output of
the target channel.
The levels of the serial data (SOmn) on the target
channel can be changed if necessitated by an
emergency.
Reset the serial array unit by stopping the clock
supply to it.
After the stop setting is completed,
go to the next processing.
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