H8SSLASH2224 datasheet(715/1071 Pages) RENESAS

Il numero della parte	H8S/2224

Spiegazioni elettronici	16-Bit Single-Chip Microcomputer H8S Family/H8S/2200 Series

PDF	1071 Pages

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Produttore elettronici	RENESAS [Renesas Technology Corp]

Homepage	http://www.renesas.com

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715 / 1071 page

Section 15 Serial Communication Interface (SCI)

Rev. 5.00 Aug 08, 2006 page 629 of 982

REJ09B0054-0500

• Reception

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

software standby mode, watch mode, subactive mode, or subsleep 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 15.42 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,

watch mode, subactive mode,

and subsleep mode.

Figure 15.42 Sample Flowchart for Mode Transition during Reception

H8S/2224 Scheda tecnica(PDF) 715 Page - Renesas Technology Corp