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H8S/2218 Scheda tecnica(PDF) 409 Page - Renesas Technology Corp

Il numero della parte H8S/2218
Spiegazioni elettronici  16-Bit Single-Chip Microcomputer H8S Family/H8S/2200 Series
PDF  750 Pages
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Produttore elettronici  RENESAS [Renesas Technology Corp]
Homepage  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

H8S/2218 Scheda tecnica(HTML) 409 Page - Renesas Technology Corp

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Section 11 Realtime Clock (RTC)
Rev.6.00 Jun. 03, 2008 Page 361 of 698
REJ09B0074-0600
Write 0 to bit 5 in ISR register
Set RTC register
Write 1 to bit 5 in IER
RUN in RTCCR1 = 1
Set IRQ5SCB = 0 and
IRQ5SCA = 1 in
ISCRH register
Read ISR register
Set the falling edge of
IRQ5
IRQ5 is enabled
Clear the IRQ5F flag
Figure 11.5 Initializing Procedure in Using RTC Interrupt
Write 0 to bit 5 in ISR register
Interrupt handling
RTE
Read ISR register
Clear the IRQ5F flag
Figure 11.6 Example of RTC Interrupt Handling Routine
11.6
Operating State in Each Mode
Table 11.3 shows the operating state in each mode when the RTC is set for clock operation and
free running timer operation. The clock operation is performed continuously even in low power
mode. Therefore, when the clock operation is unnecessary, cancel it by EXMDLSTP.



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