RTC_YEAR
rtc_write(RTC_YEAR, 70);
case RTC_YEAR:
rtc->rtc_year = BCD_TO_BYTE(BQ4802_DATA_REG(RTC_YEAR));
BQ4802_DATA_REG(RTC_YEAR) = BYTE_TO_BCD(rtc->rtc_year);
DS1287_ADDR_REG = RTC_YEAR;
DS1287_ADDR_REG = RTC_YEAR;
rtc->rtc_year = RTC_GET8(RTC_YEAR);
RTC_PUT8(RTC_YEAR, (rtc->rtc_year));
M5819P_ADDR_REG = RTC_YEAR;
M5819P_ADDR_REG = RTC_YEAR;