Renesas RL78 Series User Manual

RL78/F13, F14 CHAPTER 15 SERIAL ARRAY UNIT
R01UH0368EJ0210 Rev.2.10 963
Dec 10, 2015
(2) Operation procedure
Figure 15-122. Initial Setting Procedure for UART Transmission
Remark m: Unit number (m = 0, 1), n: Channel number (n = 0), mn = 00, 10
Starting initial setting
Setting the PER0 register
Setting the SPSm register
Setting the SMRmn register
Setting the SCRmn register
Setting the SDRmn register
Setting the SOm register
Setting port
Writing to the SSm register
Starting communication
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 a transfer baud rate (setting the
transfer clock by dividing the operation
clock
(
fMCK
))
.
Set the initial output level of the serial data
(SOmn).
Enable data output of the target channel
by setting a port register and a port mode
register.
Set the SOEmn bit to 1 and enable data
output of the target channel.
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.
Set an output data level.

Renesas RL78 Series Specifications

General

Core	RL78
CPU Clock Speed	Up to 32 MHz
Flash Memory	Up to 512 KB
RAM	Up to 32 KB
Operating Voltage	1.6 V to 5.5 V
Low Power Modes	HALT, STOP, SNOOZE
CPU Architecture	16-bit
Temperature Range	-40°C to +85°C
Package	LQFP
Timers	16-bit timers
Communication Interfaces	UART, I2C, LIN
A/D Converter	12-bit