RL78/G1P
CHAPTER 11 SERIAL ARRAY UNIT
R01UH0895EJ0100 Rev.1.00
372
Nov 29, 2019
Figure 11-51. Procedure for Resuming Slave Transmission
Remark
If PER0 is rewritten while stopping the master transmission and the clock supply is stopped, wait
until the transmission target (master) stops or transmission finishes, and then perform initialization
instead of restarting the transmission.
Starting setting for resumption
Port manipulation
Changing setting of the SPSm register
Changing setting of the SMRmn register
Changing setting of the SOm register
Port manipulation
Writing to the SSm register
Disable data output of the target channel
by setting a port register and a port
mode register.
Re-set the register to change the operation
clock setting.
Re-set the register to change serial
mode register mn (SMRmn) setting.
Set the initial output level of the serial
data (SOmn).
Enable data output 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 = 1: to enable operation).
Sets transmit data to the SIOp register (bits
7 to 0 of the SDRmn register) and wait for a
clock from the master.
(Selective)
(Selective)
(Selective)
(Essential)
(Essential)
(Essential)
(Essential)
Re-set the register to change serial
communication operation setting register
mn (SCRmn) setting.
(Selective)
Changing setting of the SCRmn register
If the OVF flag remain set, clear this
using serial flag clear trigger register mn
(SIRmn).
(Selective)
Clearing error flag
Set the SOEmn bit to 1 and enable
output from the target channel.
(Essential)
Changing setting of the SOEm register
Completing resumption setting
Starting communication
Set the SOEmn bit to 0 to stop output
from the target channel.
(Essential)
Changing setting of the SOEm register
(Essential)
Yes
No
Wait until stop the communication target
(master)
Completing master
preparations?
Changing setting of the SDRmn register
Re-set the register to change the transfer
baud rate setting (setting the transfer clock
by dividing the operation clock (f
MCK
)).
(Selective)