Filter
Top Products
RL78/G1A CHAPTER 12 SERIAL ARRAY UNIT
R01UH0305EJ0200 Rev.2.00 488
Jul 04, 2013
(2) Operation procedure
Figure 12-63. Initial Setting Procedure for Slave Transmission/Reception
Startin
g
initial settin
g
Setting the PER0 register
Setting the SPSm register
Setting the SMRmn register
Setting the SCRmn register
Setting the SDRmn register
Setting the SOm register
Changing setting of the SOEm register
Setting port
Writing to the SSm register
Completin
g
initial settin
g
Release the serial array unit from the
reset status and start clock supply.
Set the operation clock.
Set an operation mode, etc.
Set a communication format.
Set bits 15 to 9 to 0000000B for baud
rate setting.
Set the initial output level of the serial
data (SOmn).
Set the SOEmn bit to 1 and enable data
output of the target channel.
Enable data output of the target channel
by setting a port register and a port mode
register.
S
et t
h
e
SS
mn
bi
t o
f
t
h
e target c
h
anne
l
to
1
(SEmn bit = 1: to enable operation).
I
n
i
t
i
a
l
sett
i
ng
i
s comp
l
ete
d
.
Set transmit data to the SIOp register
(bits 7 to 0 of the SDRmn register) and
wait for a clock from the master.
Caution Be sure to set transmit data to the SlOp register before the clock from the master is started.
Remark m: Unit number (m = 0, 1), n: Channel number (n = 0 to 3), p: CSI number (p = 00, 01, 10, 11, 20, 21),
mn = 00 to 03, 10, 11