Renesas SH7641 - Manual (Page 554)

Section 16 I 2 C Bus Interface 2 (IIC2)
Rev. 4.00 Sep. 14, 2005 Page 504 of 982
REJ09B0023-0400
TDRE=1 ?
Yes
Yes
No
Slave transmit mode
Clear AAS in ICSR
Write transmit data
in ICDRT
Read TDRE in ICSR
Last
byte?
Write transmit data
in ICDRT
Read TEND in ICSR
Clear TEND in ICSR
Set TRS in ICCR1 to 0
Dummy-read ICDRR
Clear TDRE in ICSR
End
[1] Clear the AAS flag.
[2] Set transmit data for ICDRT (except for the last byte).
[3] Wait for ICDRT empty.
[4] Set the last byte of transmit data.
[5] Wait for the last byte to be transmitted.
[6] Clear the TEND flag .
[7] Set slave receive mode.
[8] Dummy-read ICDRR to release the SCL line.
[9] Clear the TDRE flag.
No
No
Yes
TEND=1 ?
[1]
[2]
[3]
[4]
[5]
[6]
[7]
[8]
[9]
Figure 16.20 Sample Flowchart for Slave Transmit Mode