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Section 15 Serial Communication Interface with FIFO (SCIF)
(4)
Suspension of Data Transmission
Figure 15.9 shows an example of the data transmission suspension flowchart.
Modem status change interrupt
Read DCTS flag in FMSR
DCTS = 1
Suspend data write to transmit FIFO
Set XMITFRST bit in FFCR to 1
Prepare for retransmission
(Transmission flow)
Figure 15.9 Example of Data Transmission Suspension Flowchart
Rev. 1.00 Mar. 12, 2008 Page 534 of 1178
REJ09B0403-0100
[ 1 ]
No
(Other processing)
Yes
[ 2 ]
[ 3 ]
[ 4 ]
[1] Read the DCTS flag in FMSR in the modem
status change interrupt processing routine.
If the DCTS flag is set to 1, the transmission
suspension processing starts.
[2] Suspend data write to the transmit FIFO.
[3] Set the XMITFRST bit in FFCR to 1.
[4] Prepare for retransmission of data and go to
the transmission flow.
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