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RL78/G1H CHAPTER 14 SERIAL ARRAY UNIT

R01UH0575EJ0120 Rev. 1.20 Page 385 of 920

Dec 22, 2016

Figure 14 - 53 Flowchart of Slave Transmission (in Single-Transmission Mode)

Note For the initial setting, refer to Figure 14 - 49.(Select transfer end interrupt)

SAU default setting

Starting CSI communication

Wait for transmit completes

Clear interrupt request flag (XXIF), reset interrupt mask (XXMK)

and set interrupt enable (EI).

Setting transmit data

Set storage area and the number of data for transmit data

(Storage area, Transmission data pointer, Number of

communication data and Communication end flag are optionally

set on the internal RAM by the software)

Enables interrupt

Writing transmit data to

SIOp (= SDRmn [7:0])

Start communication when master

start providing the clock

When transmit end, interrupt is generated

Determine if it completes by counting number of communication

data

Read transmit data from storage area and write it to SIOp .

Update transmit data pointer.

Transmitting next data?

Disable interrupt (MASK)

Continuing transmit?

Yes

Transfer end interrupt

RETI Clear the interrupt request flag (xxIF).

End of communication

Write STmn bit to 1

Main routine

Interrupt

processing

routine

Main routine

Note

Renesas RL78/G1H User Manual

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