HD6432351 datasheet(613/1025 Pages) RENESAS

tên linh kiện	HD6432351

Giải thích chi tiết về linh kiện	16-Bit Single-Chip Microcomputer

PDF	1025 Pages

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nhà sản xuất	RENESAS [Renesas Technology Corp]

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613 / 1025 page

Section 13 Serial Communication Interface (SCI)

Rev. 3.00 Sep 15, 2006 page 579 of 988

REJ09B0330-0300

Figure 13.4 shows a sample SCI initialization flowchart.

Wait

Start initialization

Set data transfer format in

SMR and SCMR

[1]

Set CKE1 and CKE0 bits in SCR

(TE, RE bits 0)

Yes

Set value in BRR

Clear TE and RE bits in SCR to 0

[2]

[3]

Set TE and RE bits in

SCR to 1, and set RIE, TIE, TEIE,

and MPIE bits

[4]

1-bit interval elapsed?

[1] Set the clock selection in SCR.

Be sure to clear bits RIE, TIE,

TEIE, and MPIE, and bits TE and

RE, to 0.

When the clock is selected in

asynchronous mode, it is output

immediately after SCR settings are

made.

[2] Set the data transfer format in SMR

and SCMR.

[3] Write a value corresponding to the

bit rate to BRR. Not necessary if an

external clock is used.

[4] Wait at least one bit interval, then

set the TE bit or RE bit in SCR to 1.

Also set the RIE, TIE, TEIE, and

MPIE bits.

Setting the TE and RE bits enables

the TxD and RxD pins to be used.

Figure 13.4 Sample SCI Initialization Flowchart

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