RL78/G13

Serial Array Unit (UART Communication)

R01AN0459EJ0200

Rev. 2.00

Page 2 of 43

2014.03.24

Contents

1.

Specifications .................................................................................................................................... 3

2.

Operation Check Conditions ............................................................................................................. 5

3.

Related Application Note................................................................................................................... 5

4.

Description of the Hardware.............................................................................................................. 6

4.1 Hardware Configuration Example ..................................................................................................... 6

4.2 List of Pins to be Used ...................................................................................................................... 6

5.

Description of the Software ............................................................................................................... 7

5.1 Operation Outline .............................................................................................................................. 7

5.2 List of Option Byte Settings............................................................................................................... 8

5.3 List of Constants................................................................................................................................ 8

5.4 List of Variables................................................................................................................................. 8

5.5 List of Functions ................................................................................................................................ 9

5.6 Function Specifications ..................................................................................................................... 9

5.7 Flowcharts ....................................................................................................................................... 12

5.7.1

Initialization Function ................................................................................................................. 12

5.7.2

System Function ........................................................................................................................ 13

5.7.3

I/O Port Setup ............................................................................................................................ 14

5.7.4

CPU Clock Setup ....................................................................................................................... 15

5.7.5

Serial Array Unit Setup .............................................................................................................. 16

5.7.6

UART0 Setup ............................................................................................................................. 18

5.7.7

Main Function ............................................................................................................................ 29

5.7.8

UART0 Reception Status Initialization Function ........................................................................ 31

5.7.9

UART0 Operation Start Function ............................................................................................... 32

5.7.10

INTSR0 Interrupt Service Routine.......................................................................................... 36

5.7.11

UART0 Receive Data Classification Function........................................................................ 37

5.7.12

UART0 Data Transmission Function...................................................................................... 38

5.7.13

UART0 Reception Error Interrupt Function ............................................................................ 39

5.7.14

UART0 Reception Error Classification Function .................................................................... 40

5.7.15

INTST0 Interrupt Service Routine .......................................................................................... 41

5.7.16

UART0 Transmission End Processing Function .................................................................... 42

6.

Sample Code................................................................................................................................... 43

7.

Documents for Reference ............................................................................................................... 43

Revision Record ...................................................................................................................................... 44

General Precautions in the Handling of MPU/MCU Products ................................................................. 45