Datasheet

Section 17 Serial Communication Interface with FIFO (SCIF)
Rev. 2.00 Sep. 28, 2009 Page 522 of 994
REJ09B0452-0200
(4) Suspension of Data Transmission
Figure 17.9 shows an example of the data transmission suspension flowchart.
Read DCTS flag in FMSR
Modem status change interrupt
Suspend data write to transmit FIFO
Set XMITFRST bit in FFCR to 1
(Other processing)
Prepare for retransmission
(Transmission flow)
DCTS = 1
No
Yes
[ 1 ]
[
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.
Figure 17.9 Example of Data Transmission Suspension Flowchart