HD6413008F RENESAS [Renesas Technology Corp], HD6413008F Datasheet - Page 415

• Manufacturer Part Number: HD6413008F
• Description: Renesas 16-Bit Single-Chip Microcomputer H8 Family/H8/300H Series
• Manufacturer: RENESAS [Renesas Technology Corp]

• Transmitting Serial Data (Synchronous Mode): Figure 12.16 shows a sample flowchart for
transmitting serial data and indicates the procedure to follow.
and clear TDRE flag to 0 in SSR
Write transmit data in TDR
Clear TE bit to 0 in SCR
Read TDRE flag in SSR
Read TEND flag in SSR
All data transmitted?
Start transmitting
TDRE = 1
TEND = 1
Initialize
<End>
Figure 12.16 Sample Flowchart for Serial Transmitting
Yes
Yes
Yes
No
No
No
(1)
(2)
(3)
(1)
(2)
(3)
SCI initialization: the transmit data
output function of the TxD pin is
selected automatically.
SCI status check and transmit data
write: read SSR, check that the TDRE
flag is 1, then write transmit data in
TDR and clear the TDRE flag to 0.
To continue transmitting serial data:
after checking that the TDRE flag is 1,
indicating that data can be written,
write data in TDR, then clear the TDRE
flag to 0.
Rev.4.00 Aug. 20, 2007 Page 371 of 638
12. Serial Communication Interface
REJ09B0395-0400