Renesas RL78/F13

RL78/F13, F14 CHAPTER 15 SERIAL ARRAY UNIT
R01UH0368EJ0210 Rev.2.10 903
Dec 10, 2015
Figure 15-77. Procedure for Resuming Master Transmission
Remark m: Unit number (m = 0, 1), n: Channel number (n = 0, 1), mn = 00, 01, 10, 11
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
Starting communication
Disable data output and 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
(
fMCK
))
.
Re-set the register to change serial
mode register mn (SMRmn) setting.
Set the initial output level of the serial
clock (CKOmn) and serial data (SOmn).
Enable data output and 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 and set the SEmn bit to 1 (to enable
o
p
eration
)
.
Set transmit data to the SDRmn register
and start communication.
(
Essential
)
(
Selective
)
(Selective)
(Selective)
(
Essential
)
(Essential)
(Essential)
(
Selective
)
Changing setting of the SCRmn register
If
th
e
FEF
,
PEF
, or
O
VF
fl
ag rema
i
ns
set, clear this using serial flag clear
trigger register mn (SIRmn).
(Selective)
Clearing error flag
Set the SOEmn bit to 1 and enable
output from the target channel.
(
Selective
)
Changing setting of the SOEm register
Set the SOEmn bit to 0 to stop output
from the target channel.
(
Selective
)
Changing setting of the SOEm register
(
Selective
)
Re-set the register to change serial
communication operation setting register
mn (SCRmn) setting.