Hitachi SH7760 Solution Engine2, Overview

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6.3 RTC (Real-time Clock) Functions
This section describes the RTC functions. Table 6.1 summarizes the RTC registers. For detailed description of
each register, refer to 6.3.1 to 6.3.17.
(1) Function for counting the seconds, minutes, hour, day of the week, month and year (BCD code)
(2) RTC start/stop function
(3) Alarm interrupt function
(4) 1sec/0.5sec cyclic interrupt function
(5) Automatic correction function for leap years
(6) Effective range of operation from January 1, 2000 to December 31, 2099
Table 6.3 RTC Registers
Register Abbreviation Address R/W Size Remarks
RTC control register RTCCR 0x0000 R/W 1 byte
RTC status register RTCSR 0x0001 R/W 1 byte
Second counter SECCNT 0x0002 R/W 1 byte
Minute counter MINCNT 0x0003 R/W 1 byte
Hour counter HRCNT 0x0004 R/W 1 byte
Day-of-the-week counter WKCNT 0x0005 R/W 1 byte
Day counter DAYCNT 0x0006 R/W 1 byte
Month counter MONCNT 0x0007 R/W 1 byte
Year counter YRCNT 0x0008 R/W 1 byte
Second alarm counter SECAR 0x0009 R/W 1 byte
Minute alarm counter MINAR 0x000A R/W 1 byte
Hour alarm counter HRAR 0x000B R/W 1 byte
Day-of-the-week alarm counter WKAR 0x000C R/W 1 byte
Day alarm counter DAYAR 0x000D R/W 1 byte
Month alarm counter MONAR 0x000E R/W 1 byte
RTC/Touch panel/Key input/Power supply
status register RTKISR 0x0090 R/W 1 byte