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H8S/2218 数据表(PDF) 494 Page - Renesas Technology Corp

部件名 H8S/2218
功能描述  16-Bit Single-Chip Microcomputer H8S Family/H8S/2200 Series
PDF  750 Pages
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制造商  RENESAS [Renesas Technology Corp]
网页  http://www.renesas.com
标志 RENESAS - Renesas Technology Corp

H8S/2218 数据表(HTML) 494 Page - Renesas Technology Corp

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Section 12 Serial Communication Interface
Rev.6.00 Jun. 03, 2008 Page 446 of 698
REJ09B0074-0600
• 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 12.42 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?
No
RDRF = 1
Yes
Yes
<Reception>
No
[1]
[2]
RE = 1
Initialization
<Start of reception>
Receive data being received becomes invalid.
Includes module stop mode, watch mode,
subactive mode, and subsleep mode.
[1]
[2]
Figure 12.42 Sample Flowchart for Mode Transition during Reception



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