Datasheet

V850ES/JG3-H, V850ES/JH3-H CHAPTER 19 I

C BUS

R01UH0042EJ0500 Rev.5.00 Page 884 of 1513

Aug 12, 2011

The following shows an example of the processing of the slave device by an INTIICn interrupt (it is assumed that no

extension codes are used here). During INTIICn interrupt servicing, the status is confirmed and the following steps are

executed.

<1> When a stop condition is detected, communication is terminated.

<2> When a start condition is detected, the address is confirmed. If the address does not match, communication is

terminated. If the address matches, the communication mode is set, the wait state is released, and operation

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

<3> For data transmission/reception, when the ready flag is set, operation returns from the interrupt while the I

C0n

bus remains in the wait status.

Remark <1> to <3> above correspond to <1> to <3> in Figure 19-22 Slave Operation Flowchart (2).

Figure 19-22. Slave Operation Flowchart (2)

Yes

INTIICn occurred

Set ready flag

Interrupt servicing completed

SPDn = 1?

STDn = 1?

COIn = 1?

Clear communication

direction flag, ready flag,

and communication mode flag

<1>

<2>

<3>

Communication direction flag ← TRCn

Set communication mode flag

Clear ready flag