Datasheet

RL78/L12 CHAPTER 12 SERIAL ARRAY UNIT
R01UH0330EJ0200 Rev.2.00 453
Dec 13, 2013
(2) Operation procedure
Figure 12-56. Initial Setting Procedure for Slave Reception
Figure 12-57. Procedure for Stopping Slave Reception
Starting setting to stop
Stop setting is completed
Write 1 to the STmn bit of the target channel.
(SEmn = 0 : to operation stop status)
The master transmission is stopped.
Go to the next processing.
Set the SOEmn bit to 0 and stop the output of
the target channel.
Writing the STm register
Changing setting of the SOEm register
TSFmn = 0?
If there is any data being transferred, wait for
their completion.
(If there is an urgent must stop, do not wait)
Yes
No
Reset the serial array unit by stopping the
clock supply to it.
Setting the PER0 register
(Essential)
(Selective)
(Essential)
(Selective)
Starting initial settings
Setting the PER0 register
Setting the SPSm register
Setting the SMRmn register
Setting the SCRmn register
Setting the SDRmn register
Setting port
Writing to the SSm register
Completing initial setting
Release the serial array unit from the
reset status and start clock supply.
Set the operation clock.
Set an operation mode, etc.
Set a communication format.
Set baud rate setting (bits 15 to 9) to
0000000B.
Enable data input and clock input of the
target channel by setting a port register
and a port mode register.
Set the SSmn bit of the target channel to 1
(SEmn bit = 1: to enable operation). Wait for
a clock from the master.