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RL78/G1H CHAPTER 15 SERIAL INTERFACE IICA

R01UH0575EJ0120 Rev. 1.20 Page 477 of 920

Dec 22, 2016

An example of the processing procedure of the slave with the INTIICAn interrupt is explained below

(processing is performed assuming that no extension code is used). The INTIICAn interrupt checks the

status, and the following operations are performed.

<1> Communication is stopped if the stop condition is issued.

<2> If the start condition is issued, the address is checked and communication is completed if the

address does not match. If the address matches, the communication mode is set, wait is cancelled,

and processing returns from the interrupt (the ready flag is cleared).

<3> For data transmit/receive, only the ready flag is set. Processing returns from the interrupt with the

C bus remaining in the wait state.

Remark <1> to <3> above correspond to <1> to <3> in Figure 15 - 39 Slave Operation Flowchart (2).

Figure 15 - 39 Slave Operation Flowchart (2)

Remark n = 0, 1

Set ready flag

Communication direction flag

← TRCn

Set communication mode flag

Clear ready flag

SPDn = 1?

STDn = 1?

COIn = 1?

INTIICAn generated

Interrupt servicing completed

Yes

Clear communication direction

flag, ready flag, and

communication mode flag

<1>

<2>

<3>

Renesas RL78/G1H User Manual

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