Datasheet

Section 15 I
2
C Bus Interface (IIC)
Rev. 6.00 Mar. 24, 2006 Page 264 of 412
REJ09B0142-0600
Start
Initialize
Set MST = 0
and TRS = 0 in ICCR
Set ACKB = 0 in ICSR
Read IRIC in ICCR
IRIC = 1?
Yes
No
Clear IRIC in ICCR
Read AAS and ADZ in ICSR
AAS = 1
and ADZ = 0?
Read TRS in ICCR
TRS = 0?
No
Yes
No
Yes
Yes
No
Yes
Yes
No
No
[1]
[2]
[3]
[4]
[5]
[6]
[7]
[8]
Last receive?
Read ICDR
Read IRIC in ICCR
IRIC = 1?
Clear IRIC in ICCR
Set ACKB = 1 in ICSR
Read ICDR
Read IRIC in ICCR
Read ICDR
IRIC = 1?
Clear IRIC in ICCR
End
General call address processing
* Description omitted
Slave transmit mode
[1] Select slave receive mode.
[2] Wait for the first byte to be received (slave
address).
[3] Start receiving. The first read is a dummy read.
[4] Wait for the transfer to end.
[5] Set acknowledge data for the last reception.
[6] Start the last reception.
[7] Wait for the transfer to end.
[8] Read the last receive data.
Figure 15.15 Sample Flowchart for Slave Receive Mode