H8S2245 datasheet(497/818 Pages) RENESAS

部件名	H8S2245

功能描述	Renesas 16-Bit Single-Chip Microcomputer H8S Family / H8S/2200 Series

PDF	818 Pages

Scroll/Zoom	100%

制造商	RENESAS [Renesas Technology Corp]

网页	http://www.renesas.com

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497 / 818 page

Section 12 Serial Communication Interface (SCI)

Rev.3.00 Mar. 26, 2007 Page 455 of 772

REJ09B0355-0300

Wait

Start initialization

Set data transfer format in

SMR and SCMR

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?

Set CKE1 and CKE0 bits in SCR

(TE, RE bits 0)

[1]

[1] Set the clock selection in SCR. Be sure

to clear bits RIE, TIE, TEIE, and MPIE,

TE and RE, to 0.

[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.

Note: In simultaneous transmit and receive operations, the TE and RE bits should both

be cleared to 0 or set to 1 simultaneously.

Figure 12.15 Sample SCI Initialization Flowchart

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