HD6417660 RENESAS [Renesas Technology Corp], HD6417660 Datasheet - Page 518

• Manufacturer Part Number: HD6417660
• Description: Renesas 32-Bit RISC Microcomputer
• Manufacturer: RENESAS [Renesas Technology Corp]

2. Serial Data Transmission
Rev. 1.00, 02/04, page 480 of 804
Figure 16.14 shows sample flowcharts for serial transmission.
Write remaining transmit data to SCFTDR
When using transmit FIFO data interrupt,
Write transmit data exceeding transmit
Set transmit trigger number in TTRG1
TDFE flag to 0 after reading 1 from it
Figure 16.14 Sample Serial Transmission Flowchart (1)
Figure 16.14 Sample Serial Transmission Flowchart (2)
trigger setting number, and clear
When using transmit FIFO data
Clear TE bit in SCSCR to 0
Clear TE bit in SCSCR to 0
interrupt, set TIE bit to 1
and TTRG0 in SCFCR
1-bit interval elapsed?
Set TE bit in SCSCR
Start of transmission
Set TE bit in SCSCR
Start of transmission
End of transmission
End of transmission
set TIE bit to 1
(First Transmission after Initialization)
TEND =1?
(Second and Subsequent Transmission)
TEND =1?
Yes
Yes
Yes
No
Wait
No
No
1
2
3
4
5
1
2
3
1. Set the transmit trigger number
2. Write transmit data to SCFTDR,
3. Wait for one bit interval.
4. Transmission is started when the
5. After the end of transmission, clear
in SCFCR.
and clear the TDFE flag to 0 after
reading 1 from it.
TE bit in SCSCR is set to 1.
the TE bit to 0.
1. Write the remaining transmit
2. Transmission is started when
3. After the end of transmission,
data to SCFTDR.
the TE bit in SCSCR is set to 1.
clear the TE bit to 0.