SH7261 datasheet(671/1348 Pages) RENESAS

Part #	SH7261

Description	32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7260 Series

PDF	1348 Pages

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Manufacturer	RENESAS [Renesas Technology Corp]

Direct Link	http://www.renesas.com

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671 / 1348 page

Section 15 Realtime Clock (RTC)

Rev. 2.00 Sep. 07, 2007 Page 639 of 1312

REJ09B0320-0200

Section 15 Realtime Clock (RTC)

This LSI has a realtime clock (RTC) with its own 32.768-kHz crystal oscillator.

15.1

Features

• Clock and calendar functions (BCD format): Seconds, minutes, hours, date, day of the week,

month, and year

• 1-Hz to 64-Hz timer (binary format)

64-Hz counter indicates the state of the RTC divider circuit between 64 Hz and 1 Hz

• Start/stop function

• 30-second adjust function

• Alarm interrupt: Frame comparison of seconds, minutes, hours, date, day of the week, month,

and year can be used as conditions for the alarm interrupt

• Periodic interrupts: the interrupt cycle may be 1/256 second, 1/64 second, 1/16 second, 1/4

second, 1/2 second, 1 second, or 2 seconds

• Carry interrupt: a carry interrupt indicates when a carry occurs during a counter read

• Automatic leap year adjustment

SH7261 Datasheet(PDF) 671 Page - Renesas Technology Corp