NEC 78K0 Series User Manual page 448

8-bit single-chip microcontrollers

Hide thumbs Also See for 78K0 Series:

Table of Contents

An example of the processing procedure of the slave with the INTIIC0 interrupt is explained below (processing

is performed assuming that no extension code is used). The INTIIC0 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.

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 I

remaining in the wait state.

<1> to <3> above correspond to <1> to <3> in Figure 17-26 Slave Operation Flowchart (2).

INTIIC0 generated

Set ready flag

Interrupt servicing completed

CHAPTER 17 SERIAL INTERFACE IIC0

If the address matches, the communication mode is set, wait is cancelled, and

Figure 17-26. Slave Operation Flowchart (2)

Communication direction flag

Set communication mode flag

Clear ready flag

Preliminary User's Manual U17260EJ3V1UD

Clear communication direction

communication mode flag

flag, ready flag, and

Show Quick Links

Table of Contents