SH7265 Datasheet, PDF (827/2024 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7260 Series

Section 16 Serial Communication Interface with FIFO (SCIF)
• Transmitting Serial Data (Clock Synchronous Mode)
Figure 16.13 shows a sample flowchart for transmitting serial data.
Use the following procedure for serial data transmission after enabling the SCIF for
transmission.
Start of transmission
Read TDFE flag in SCFSR [1]
No
TDFE = 1?
Yes
Write transmit data to SCFTDR
and clear TDFE flag
in SCFSR to 0
All data transmitted?
Yes
No
[2]
Read TEND flag in SCFSR
No
TEND = 1?
Yes
Clear TE bit in SCSCR to 0
[1] SCIF status check and transmit data
write:
Read SCFSR and check that the
TDFE flag is set to 1, then write
transmit data to SCFTDR, and clear
the TDFE flag to 0.
[2] Serial transmission continuation
procedure:
To continue serial transmission, read
1 from the TDFE flag to confirm that
writing is possible, them write data to
SCFTDR, and then clear the TDFE
flag to 0.
End of transmission
Figure 16.13 Sample Flowchart for Transmitting Serial Data
Rev. 1.00 Mar. 14, 2008 Page 791 of 1984
REJ09B0351-0100