RL78/F13, F14 CHAPTER 15 SERIAL ARRAY UNIT
R01UH0368EJ0210 Rev.2.10 974
Dec 10, 2015
Figure 15-132. Procedure for Resuming UART Reception
Starting setting for resumption
Manipulating target for communication
Changing setting of the SPSm register
Changing setting of the SDRmn
registe
Start communication
Stop the target for communication or wait
until the target completes its operation.
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 registers to change serial mode
registers mn, mr (SMRmn, SMRmr)
setting.
Set the SSmn bit of the target channel to 1 and set
the SEmn bit to 1 (to enable operation).
The start bit is detected.
(Essential)
(Selective)
Re-set the register to change serial
communication operation setting register
mn (SCRmn) setting.
Changing setting of the SCRmn register
If the FEF, PEF, and OVF flags remain
set, clear them using serial flag clear
trigger register mn (SIRmn).
Clearing error flag
(Essential)
(Essential)
(Selective)
(Selective)
(Selective)
(Selective)
Enable data input of the target channel
by setting a port register and a port mode
register.
(Essential)
Setting port
Writing to the SSm register
Changing setting of the SMRmn
and SMRmr registers
Caution For the UART reception, set the RXEmn bit of SCRmn register to 1, and then be sure to set SSmn
to 1 after 4 or more f
MCK clocks have elapsed.
Remark m: Unit number (m = 0, 1), n: Channel number (n = 1), mn = 00, 10, r: Channel number (r = n − 1)
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