SH7708 datasheet(405/633 Pages) RENESAS

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SH7708 데이터시트(PDF) 405 Page - Renesas Technology Corp

부품명	SH7708

상세설명	SuperH??RISC engine

PDF	633 Pages

Scroll/Zoom	100%

제조업체	RENESAS [Renesas Technology Corp]

홈페이지	http://www.renesas.com

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405 / 633 page

387

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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