Renesas RL78/G1P Hardware User Manual page 443

RL78/G1P
Figure 11-94. Procedure for Resuming Slave Transmission/Reception
Starting setting for resumption
(Essential)
(Essential)
(Selective)
Changing setting of the SPSm register
(Selective)
Changing setting of the SMRmn register
(Selective)
Changing setting of the SCRmn register
(Selective)
(Selective)
Changing setting of the SOEm register
(Selective)
Changing setting of the SOm register
(Selective)
Changing setting of the SOEm register
(Essential)
(Essential) Writing to the ISC register
(Essential) Writing to the SSm register
(Essential)
Completing resumption setting
Cautions 1. Be sure to set transmit data to the SlOp register before the clock from the master is started.
2. 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.
R01UH0895EJ0100 Rev.1.00
Nov 29, 2019
Completing master
preparations?
Yes
Port manipulation
Clearing error flag
Port manipulation
Starting communication
CHAPTER 11 SERIAL ARRAY UNIT
Wait until stop the communication target (master)
No
or operation completed.
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.
Re-set the register to change serial communication
operation setting register mn (SCRmn) setting.
If the OVF flag remains set, clear this
using serial flag clear trigger register mn
(SIRmn).
Set the SOEmn bit to 0 to stop output from the
target channel.
Set the initial output level of the serial data
(SOmn).
Set the SOEmn bit to 1 and enable output from the
target channel.
Enable data output of the target channel by setting
a port register and a port mode register. When
connecting multiple slaves, set N-ch open-drain
before setting data output.
Set the SSIE00 bit to 1 and enable slave select
function operation of channel 0.
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.
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