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Section 17 I
2
C Bus Interface 3
Page 884 of 2108 R01UH0134EJ0400 Rev. 4.00
Sep 24, 2014
SH7262 Group, SH7264 Group
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
Clear 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.
[9] Clear the TDRE flag.
No
No
Yes
TEND=1 ?
[1]
[2]
[3]
[4]
[5]
[6]
[7]
[8]
[9]
Figure 17.20 Sample Flowchart for Slave Transmit Mode