SH7720 Datasheet, PDF (682/1524 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7700 Series

Section 18 Serial Communication Interface with FIFO (SCIF)
Figure 18.6 shows the transmit data stop function flowchart.
Start of transmission
Set transmit data stop
number in SCTDSR
1
Set TSE and TSIE bits
in SCFCR to 1
Read TSF bit in SCSSR;
if it is 1, clear to 0 after reading ₂
1 from TSF bit
1. Set the transmit data stop number in SCTDSR, then set
the TSE bit in SCFCR to 1.When an interrupt is enabled,
also set the TSIE bit to 1.
2. If the TSF bit in SCSSR is set to 1, clear it to 0 after
reading 1. When transmit data is written to SCFTDR 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 SCFCR 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 18.6 Transmit Data Stop Function Flowchart
Rev. 3.00 Jan. 18, 2008 Page 620 of 1458
REJ09B0033-0300