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SH7713 Datasheet(PDF) 566 Page - Renesas Technology Corp

Part # SH7713
Description  Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7700 Series
PDF  904 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

SH7713 Datasheet(HTML) 566 Page - Renesas Technology Corp

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Section 15 Realtime Clock (RTC)
Rev.1.50 Aug. 30, 2006 Page 526 of 860
REJ09B0288-0150
Write 0 to CF in RCR1
Note: Set AF in RCR1 to 1 so that alarm
flag is not cleared.
Write 0 to CIE in RCR1
Read RCR1 and check CF
Write 0 to CIE in RCR1
Carry flag = 1?
No
Yes
Clear the carry flag
Disable the carry
interrupt
Read counter
register
Write 1 to CIE in RCR1,
and write 0 to CF in RCR1
Note: Set AF in RCR1 to 1 so that
alarm flag is not cleared.
Interrupt
generated?
No
Yes
Enable the carry
interrupt
Clear the carry flag
Disable the carry
interrupt
Read counter
register
To read the time
without using interrupts
(b) To use interrupts
(a)
Figure 15.3 Reading Time



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