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SH7708 bảng dữ liệu(PDF) 387 Page - Renesas Technology Corp

tên linh kiện SH7708
Giải thích chi tiết về linh kiện  SuperH??RISC engine
PDF  633 Pages
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nhà sản xuất  RENESAS [Renesas Technology Corp]
Trang chủ  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

SH7708 bảng dữ liệu(HTML) 387 Page - Renesas Technology Corp

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369
Initialize
Clear TE and RE bits in SCSCR to 0
Select transmit/receive
format in SCSMR
Set value to SCBRR
Set CKE1 and CKE0 bits in SCSCR
(TE and RE bits are 0)
Wait
Set TE and RE bits in SCSCR to 1
and set RIE, TEIE, and MPIE bits
Has a 1-bit
interval elapsed?
End
(2)
(3)
(1)
(4)
No
Yes
Note:
Numbers in parentheses refer to the preceding procedure.
Figure 13.4 Sample Flowchart for SCI Initialization
Transmitting Serial Data (Asynchronous Mode): Figure 13.5 shows a sample flowchart for
transmitting serial data. The procedure for transmitting serial data is:
1. SCI status check and transmit data write: Read the serial status register (SCSSR), check that
the TDRE bit is 1, then write transmit data in the transmit data register (SCTDR) and clear
TDRE to 0.
2. To continue transmitting serial data: Read the TDRE bit to check whether it is safe to write (if
it reads 1); if so, write data in SCTDR, then clear TDRE to 0.
3. To output a break at the end of serial transmission: Clear the SPB0DT bit in the SCSPTR, set
the SPB0IO bit to 1 and then clear the TE bit to 0 in SCSCR.



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