RL78G13 datasheet(18/46 Pages) RENESAS

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RL78/G13

Serial Array Unit (UART Communication)

R01AN0459EJ0200

Rev. 2.00

Page 18 of 43

2014.03.24

5.7.6

UART0 Setup

Figures 5.7, 5.8, and 5.9 show the flowcharts for setting up UART0.

Figure 5.7

UART0 Setup (1/3)

R_UART0_Create()

ST0 register

 03H

SMR00 register

 0022H

STMK0 bit

 1

STIF0 bit

 0

SRMK0 bit

 1

SRIF0 bit

 0

SREMK0 bit

 1

SREIF0 bit

 0

STPR10 bit

 1

STPR00 bit

 1

SRPR10 bit

 1

SRPR00 bit

 1

SREPR10 bit

 1

SREPR00 bit

 1

Stop operation of channels 0 and 1.

Disable INTST0 interrupt & clear

the interrupt request flag

INTST0 interrupt priority level:

Select level 3 (lowest)

INTSRE0 interrupt priority level:

Select level 3 (lowest)

Set SAU channel 0 operation mode

 Channel 0 operation clock

: CK00

 Channel 0 transfer clock

: Division of CK00

 Start trigger source

: Software trigger

 Detect a falling edge as a start bit

 Channel 0 operation mode

: UART mode

 Channel 0 interrupt source

: Transfer end interrupt

Disable INTSR0 interrupt &

clear the interrupt request flag

Disable INTSRE0 interrupt & clear

the interrupt request flag

INTSR0 interrupt priority level:

Select level 3 (lowest)

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