RL78/G1P
CHAPTER 11 SERIAL ARRAY UNIT
R01UH0895EJ0100 Rev.1.00
407
Nov 29, 2019
Figure 11-80. Procedure for Resuming Slave Transmission
Changing setting of the SMRmn register
Changing setting of the SCRmn register
Clearing error flag
Changing setting of the SOEm register
Changing setting of the SOm register
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.
Writing to the SSm register
Changing setting of the SOEm register
(Selective)
(Selective)
(Selective)
(Selective)
(Essential)
(Essential)
(Essential)
(Essential)
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.
Completing resumption setting
Starting communication
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.
Writing to the ISC register
Port manipulation
(Essential)
(Essential)
Set the SSIE00 bit to 1 and enable slave select
function operation of channel 0.
Disable data output of the target channel by setting
a port register and a port mode register.
Port manipulation
Starting setting for resumption
Changing setting of the SPSm register
Re-set the register to change the operation clock
setting.
(Selective)
(Selective)
Completing master
preparations?
No
Wait until stop the communication target (master)
or operation completed.
Yes
(Essential)
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)
Remark
m: Unit number (m = 0), n: Channel number (n = 0), p: CSI number (p = 00)