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H8S/2225 数据表(PDF) 704 Page - Renesas Technology Corp

部件名 H8S/2225
功能描述  16-Bit Single-Chip Microcomputer H8S Family/H8S/2200 Series
PDF  1071 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/2225 数据表(HTML) 704 Page - Renesas Technology Corp

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Section 15 Serial Communication Interface (SCI)
Rev. 5.00 Aug 08, 2006 page 618 of 982
REJ09B0054-0500
Initialization
Read RDR and clear
RDRF flag in SSR to 0
Clear RE bit to 0
Start reception
Start
Error processing
No
No
No
Yes
Yes
ORER = 0 and
PER = 0
RDRF = 1?
All data received?
Yes
Figure 15.33 Example of Reception Processing Flow
15.7.8
Clock Output Control
When the GM bit in SMR is set to 1, the clock output level can be fixed with bits CKE0 and
CKE1 in SCR. At this time, the minimum clock pulse width can be made the specified width.
Figure 15.34 shows the timing for fixing the clock output level. In this example, GM is set to 1,
CKE1 is cleared to 0, and the CKE0 bit is controlled.
Specified pulse width
SCK
CKE0
Specified pulse width
Figure 15.34 Timing for Fixing Clock Output Level



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