H8SSLASH2218 datasheet(409/750 Pages) RENESAS

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H8S/2218 数据表(PDF) 409 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

Scroll/Zoom	100%

制造商	RENESAS [Renesas Technology Corp]

网页	http://www.renesas.com

标志

409 / 750 page

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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