r5f71374an80fpv Renesas Electronics Corporation., r5f71374an80fpv Datasheet - Page 605

• Manufacturer Part Number: r5f71374an80fpv
• Description: 32-bit Risc Microcomputer Superh?? Risc Engine Family
• Manufacturer: Renesas Electronics Corporation.

Transmitting Serial Data (Clock Synchronous Mode): Figure 14.10 shows a sample flowchart
for transmitting serial data.
Use the following procedure for serial data transmission after enabling the SCI for transmission.
Write transmit data to SCTDR
Read TDRE flag in SCSSR
Read TEND flag in SCSSR
Clear TE bit in SCSCR to 0
Figure 14.10 Sample Flowchart for Transmitting Serial Data
and clear TDRE flag
All data transmitted?
Start of transmission
End of transmission
in SCSSR to 0
TDRE = 1?
TEND = 1?
Yes
Yes
Yes
No
No
No
[1] SCI status check and transmit data
[2] Serial transmission continuation
Section 14 Serial Communication Interface (SCI)
write:
TDRE flag is set to 1, then write
transmit data to SCTDR, and clear
the TDRE flag to 0.
procedure:
1 from the TDRE flag to confirm that
writing is possible, then write data to
SCTDR, and then clear the TDRE
flag to 0. Checking and clearing of the
TDRE flag is automatic when the
DTC is activated by a transmit data
empty interrupt (TXI) request, and
data is written to SCTDR.
Read SCSSR and check that the
To continue serial transmission, read
Rev. 1.00 Sep. 21, 2007 Page 579 of 1124
REJ09B0402-0100