Freescale Semiconductor HCS08 Series, Reference Manual

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Real-Time Counter (S08RTCV1)
MC9S08JS16 MCU Series Reference Manual, Rev. 4
Freescale Semiconductor 165
RTCSC.byte = RTCSC.byte | 0x80;
/* RTC interrupts every 1 Second */
+;
/* 60 seconds in a minute */
if (Seconds > 59){
+;
Seconds = 0;
}
/* 60 minutes in an hour */
if (Minutes > 59){
Hours++;
Minutes = 0;
}
/* 24 hours in a day */
if (Hours > 23){
Days ++;
Hours = 0;
}