SH7708 datasheet(405/633 Pages) RENESAS

データシートサーチシステム

SH7708 データシート(PDF) 405 Page - Renesas Technology Corp

部品番号	SH7708

部品情報	SuperH??RISC engine

PDF	633 Pages

Scroll/Zoom	100%

メーカー	RENESAS [Renesas Technology Corp]

ホームページ	http://www.renesas.com

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405 / 633 page

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Transmitting Serial Data (Synchronous Mode): Figure 13.16 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.

Start transmission

Read TDRE bit in SCSSR

All data transmitted?

Yes

End transmission

(1)

(2)

TDRE = 1?

Write transmit data to SCTDR

and clear TDRE bit in SCSSR to 0

Yes

Read TEND bit in SCSSR

TEND = 1?

Yes

Clear TE bit in SCSCR to 0

Note:

Numbers in parentheses refer to the preceding procedure.

Figure 13.16 Sample Flowchart for Serial Transmitting

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