H8S2245 datasheet(512/818 Pages) RENESAS

Part #	H8S2245

Description	Renesas 16-Bit Single-Chip Microcomputer H8S Family / H8S/2200 Series

PDF	818 Pages

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Manufacturer	RENESAS [Renesas Technology Corp]

Direct Link	http://www.renesas.com

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512 / 818 page

Section 12 Serial Communication Interface (SCI)

Rev.3.00 Mar. 26, 2007 Page 470 of 772

REJ09B0355-0300

• Reception

Receive operation should be stopped (by clearing RE to 0) before making a module stop mode

or software standby mode transition. RSR, RDR, and SSR are reset. If a transition is made

without stopping operation, the data being received will be invalid.

To continue receiving without changing the reception mode after the relevant mode is cleared,

set RE to 1 before starting reception. To receive with a different receive mode, the procedure

must be started again from initialization.

Figure 12.26 shows a sample flowchart for mode transition during reception.

RE = 0

Transition to software

standby mode, etc.

Read receive data in RDR

Read RDRF flag in SSR

Exit from software

standby mode, etc.

Change

operating mode?

RDRF = 1?

Yes

[1]

[2]

RE = 1

Initialization

[1]

Receive data being received

becomes invalid.

[2]

Includes module stop mode.

Figure 12.26 Sample Flowchart for Mode Transition during Reception

H8S2245 Datasheet(PDF) 512 Page - Renesas Technology Corp