Datasheet

RL78/L12 CHAPTER 12 SERIAL ARRAY UNIT
R01UH0330EJ0200 Rev.2.00 425
Dec 13, 2013
Figure 12-34. Procedure for Resuming Master Reception
Remark If PER0 is rewritten while stopping the master transmission and the clock supply is stopped, wait
until the transmission target (slave) 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 SDRmn register
Changing setting of the SMRmn register
Changing setting of the SOm register
Port manipulation
Writing to the SSm register
Completing resumption
settin
g
Disable clock 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 the
transfer baud rate setting (setting the
transfer clock by dividing the operation
clock (f
MCK)).
Re-set the register to change serial
mode register mn (SMRmn) setting.
Set the initial output level of the serial
clock (CKOmn).
Enable clock 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 bit = 1: to enable operation).
Setting is completed
Sets dummy data to the SIOp register (bits
7 to 0 of the SDRmn register) and start
communication.
(Essential)
(
Selective
)
(Selective)
(Selective)
(Selective)
(
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
Completing slave
p
re
p
arations?
(Essential)
Ye s
No
Wait until stop the communication target
(slave) or communication operation
completed
<R>