Renesas RL78/G15 User Manual

RL78/G15 CHAPTER 12 SERIAL ARRAY UNIT
R01UH0959EJ0110 Rev.1.10 Page 474 of 765
Mar 7, 2023
Figure 12-79. Procedure for Resuming UART Reception
Starting setting for resumption
Completing resumption setting
Wait until the communication target stops or
communication operation is completed
.
If the FEF,
PEF,
and OVF flags remain set
,
clear them
using serial flag cleartrigger re gister mn
(SIRmn
).
Enable data input of the target channel by setting a
port register and a port mode register.
Set the SSmn bit of the target channel to
1 and set
the SEmn bit to 1 (
to enable operation
).
Become wait
for start bit detection
.
Communication target
is ready
?
No
Yes
(Selective
)
(
Essential
)
Changing setting of the SPSm
register
Changing setting of the SMRmn and
SMRmr registers
Changing setting of the SCRmn
register
Clearing error flag
Setting port
Writing to the SSm register
(Essential
)
(
Selective)
Re
-
set the register to change the operation clock setting
.
Re
-
set the registers to change serial mode registers mn,
mr
(
SMRmn,
SMRmr
)
setting
.
Re-
set the register to change serial communication
operation setting register mn
(
SCRmn)
setting.
(
Essential
)
(
Selective
)
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
)
(
Selective)
Caution Set the RXEmn bit of SCRmn register to 1, and then be sure to set SSmn to 1 after at least 4 f
MCK
clocks have elapsed.
Remark If PER0 is rewritten while stopping the communication to reset the serial array unit, wait until the
communication target stops or communication finishes, and then perform initialization instead of restarting the
communication.

Renesas RL78/G15 Specifications

General

Brand	Renesas
Model	RL78/G15
Category	Microcontrollers
Language	English