SH7730 Datasheet, PDF (800/1188 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7780 Series

Section 23 Serial Communication Interface with FIFO A (SCIFA)
Figure 23.6 shows the transmit data stop function flowchart.
Start of transmission
Set transmit data stop
number in SCATDSR
1
Set TSE and TSIE bits
in SCAFCR to 1
Read TSF bit in SCASSR;
if it is 1, clear to 0 after reading ₂
1 from TSF bit
1. Set the transmit data stop number in SCATDSR, then set
the TSE bit in SCAFCR to 1.When an interrupt is
enabled, also set the TSIE bit to 1.
2. If the TSF bit in SCASSR is set to 1, clear it to 0 after
reading 1. When transmit data is written to SCAFTDR in
this state, transmit operation is started.
3. If the TSF bit is set to 1 (transmit data stop number is
matched with transmit data number), transmit operation
is stopped. If the TSIE bit is set to 1, an interrupt is
generated.
Serial transmission continuation procedure:
Set the TCRST bit in SCAFCR to 1, clear transmit count,
and clear the TCRST bit to 0. Then follow steps 1, 2, and 3.
3
TSF = 1 ?
No
Yes
End of transmission
Figure 23.6 Transmit Data Stop Function Flowchart
Rev. 1.00 Sep. 19, 2007 Page 752 of 1136
REJ09B0359-0100