Figure 17.16 Sample Flowchart For Slave Transmit Mode - Renesas H8S/2437 Hardware Manual

Slave transmit mode
Clear AAS in ICSR
Write transmit data
in ICDRT
Read TDRE in ICSR
No
TDRE = 1 ?
Yes
No
Last byte?
Yes
Write transmit data
to ICDRT
Read TEND in ICSR
No
TEND = 1 ?
Yes
Clear TEND in ICSR
Set TRS = 0 in ICCRA
Dummy reading of ICDRR
Clear TDRE in ICSR
End

Figure 17.16 Sample Flowchart for Slave Transmit Mode

[1] Clear the AAS flag.
[1]
[2] Set transmit data to ICDRT (except for the last byte).
[3] Wait for ICDRT empty.
[2]
[4] Set the last byte of the transmit data.
[5] Wait the transmission end of the last byte.
[3]
[6] Clear the TEND flag.
[7] Set slave receive mode.
[8] Dummy reading of ICDRR to release the SCL line.
[4]
[9] Clear the TDRE flag.
[5]
[6]
[7]
[8]
[9]
Rev. 1.00, 09/03, page 503 of 704