M41T93_REG_CENT_HOUR
tm->tm_hour = bcd2bin(buf[M41T93_REG_CENT_HOUR] & 0x3f);
century_after_1900 = (buf[M41T93_REG_CENT_HOUR] >> 6) + 1;
data[M41T93_REG_CENT_HOUR] = bin2bcd(tm->tm_hour) |