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Rev. 1.0, 07/01, page 247 of 372
No
Yes
RDRF=1 ?
No
Yes
RDRF=1 ?
Last receive
- 1?
Mater receive mode
Clear TEND in ICSR
Clear TRS in ICCR1 to 0
Clear TDRE in ICSR
Clear ACKBT in ICIER to 0
Dummy-read ICDRR
Read RDRF in ICSR
Read ICDRR
Set ACKBT in ICIER to 1
Set RCVD in ICCR1 to 1
Read ICDRR
Read RDRF in ICSR
Write 0 to BBSY
and SCP
Read STOP in ICSR
Read ICDRR
Clear RCVD in ICCR1 to 0
Clear MST in ICCR1 to 0
End
No
Yes
STOP=1 ?
No
Yes
[1] Clear TEND, select master receive mode, and then clear TDRE.
[2] Set acknowledge to the transmit device.
[3] Dummy-read ICDDR.
[4] Wait for 1 byte to be received
[5] Check whether it is the (last receive - 1).
[6] Read the receive data last.
[7] Set acknowledge of the final byte. Disable continuous reception (RCVD = 1).
[8] Read the (final byte - 1) of receive data.
[9] Wait for the last byte to be receive.
[10] Issue the stop condition.
[11] Wait for the creation of stop condition.
[12] Read the last byte of receive data.
[13] Clear RCVD.
[14] Set slave receive mode.
[1]
[2]
[3]
[4]
[5]
[6]
[7]
[8]
[9]
[10]
[11]
[12]
[13]
[14]
Figure 15-18 Sample Flowchart for Master Receive Mode