HD6417706 RENESAS [Renesas Technology Corp], HD6417706 Datasheet - Page 496

• Manufacturer Part Number: HD6417706
• Description: Renesas 32-Bit RISC Microcomputer Super RISC engine Family/SH7700 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

Figure 16.6 shows a sample flowchart for serial transmission.
Use the following procedure for serial data transmission after enabling the SCIF for transmission.
Rev. 4.00, 03/04, page 450 of 660
Serial data transmission
trigger set number) to SCFTDR2, read 1
Write transmit data (16 - transmit
from TDFE bit and TEND flag in
Clear TE bit in SCSCR2 to 0
Read TDFE bit in SCSSR2
Read TEND bit in SCSSR2
Set SCPDR and SCPCR
SCSSR2, then clear to 0
All data transmitted?
End of transmission
Start transmission
Figure 16.6 Sample Serial Transmission Flowchart
Break output?
TDFE= 1?
TEND= 1?
Yes
Yes
Yes
Yes
No
No
No
No
1. SCIF status check and transmit data write:
2. Serial transmission continuation procedure:
3. Break output at the end of serial
Read SCSSR2 and check that the TDFE
flag is set to 1, then write transmit data to
the SCFTDR2, read 1 from the TDFE and
TEND flags, then clear these flags to 0.
The number of transmit data bytes that can
be written is 16 - (transmit trigger set
number).
To continue serial transmission, read 1 from
the TDFE flag to confirm that writing is
possible, then write data to SCFTDR2, and
then clear the TDFE flag to 0.
transmission: To output a break in serial
transmission, set the SCPDR and SCPCR,
then clear the TE bit to 0 in the SCSCR2.
For information on SCPDR and SCPCR,
see 16.3.11, SC Port Control Register
(SCPCR), and 16.3.12, SC Port Data
Register (SCPDR).
In steps 1 and 2, it is possible to ascertain
the number of data bytes that can be
written from the number of transmit data
bytes in SCFTDR2 indicated by the upper 8
bits of the SCFDR2.