Section 28 Serial Communication Interface with FIFO/IrDA Interface (SCIF/IrDA)
Rev. 1.00 Oct. 01, 2007 Page 1168 of 1956
REJ09B0256-0100
(4)
Serial Data Transmission (Clocked Synchronous Mode)
Figure 28.14 shows a sample flowchart for serial transmission.
Use the following procedure for serial data transmission after enabling the SCIF for transmission.
Start of transmission
Initialization
Read TDFE flag in SCFSR
TDFE = 1?
Write transmit data to SCFTDR
and clear TDFE flag and
TEND flag in SCFSR to 0
All data transmitted?
Read TEND flag in SCFSR
TEND = 1?
Clear TE bit in SCSCR to 0
End of transmission
Note: In clock synchronous mode, when transmit data is written to the SCFTDR by the DMAC,
the TEND flag may no be cleared. Therefore, if the DMAC is used for transmission in
clock synchronous mode, read the TEND flag in the following method.
1. Confirm data transfer completion on the DMAC side.
2. Read the TEND flag.
3. Clear the TEND flag to 0 when TEND = 1.
4. Read the TEND flag again.
5. Use the TEND flag read for the second time.
No
Yes
No
Yes
No
Yes
[1] SCIF initialization:
See sample SCIF initialization flowchart in figure 28.13.
[2] 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.
[3] Serial transmission continuation procedeure:
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.
[1]
[3]
[2]
Figure 28.14 Sample Serial Transmission Flowchart
Содержание SH7763
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Страница 686: ...Section 14 Direct Memory Access Controller DMAC Rev 1 00 Oct 01 2007 Page 620 of 1956 REJ09B0256 0100 ...
Страница 710: ...Section 16 Clock Pulse Generator CPG Rev 1 00 Oct 01 2007 Page 644 of 1956 REJ09B0256 0100 ...
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Страница 1124: ...Section 26 I 2 C Bus Interface IIC Rev 1 00 Oct 01 2007 Page 1058 of 1956 REJ09B0256 0100 ...
Страница 1184: ...Section 27 Serial Communication Interface with FIFO SCIF Rev 1 00 Oct 01 2007 Page 1118 of 1956 REJ09B0256 0100 ...
Страница 1350: ...Section 30 SIM Card Module SIM Rev 1 00 Oct 01 2007 Page 1284 of 1956 REJ09B0256 0100 ...
Страница 1484: ...Section 33 Audio Codec Interface HAC Rev 1 00 Oct 01 2007 Page 1418 of 1956 REJ09B0256 0100 ...
Страница 1560: ...Section 35 USB Host Controller USBH Rev 1 00 Oct 01 2007 Page 1494 of 1956 REJ09B0256 0100 ...
Страница 1720: ...Section 37 LCD Controller LCDC Rev 1 00 Oct 01 2007 Page 1654 of 1956 REJ09B0256 0100 ...
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