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Field
31–16
Reserved, must be cleared.
15–8
Sampling timer 7–0 interrupt flags. Indicates an interrupt has occurred at the corresponding sampling rate, equal
SAMn
to or close to 2
RTC_GOC[31:9]. See
0 No SAM7–0 interrupt has occurred
1 A SAM7–0 interrupt has occurred
7
2 Hz interrupt flag. Indicates an interrupt has occurred. If enabled, this bit is set every half a second.
2HZ
0 No interrupt has occurred
1 A 2 Hz interrupt has occurred
6
Reserved, must be cleared.
5
Hour interrupt flag. If enabled, this bit is set on every increment of the hour counter in the RTC_HOURMIN register.
HR
0 No interrupt has occurred
1 An hour interrupt has occurred
4
1 Hz interrupt flag. If enabled, this bit is set on every increment of the second counter of the RTC_SECONDS
1HZ
register.
0 No interrupt has occurred
1 A 1 Hz interrupt has occurred
3
Day interrupt flag. If enabled, this bit is set on every increment of the day counter in the RTC_DAYS register.
DAY
0 No interrupt has occurred
1 A day interrupt has occurred
2
Alarm interrupt flag. Indicates the real-time clock matches the value in the alarm registers plus one second. The
ALM
alarm reoccurs every 65,536 days. For a single alarm, clear the interrupt enable for this bit in the interrupt service
routine.
0 No interrupt has occurred
1 An alarm interrupt has occurred
1
If enabled, this bit is set on every increment of the minute counter in the RTC_HOURMIN register.
MIN
0 No interrupt has occurred
1 A minute interrupt has occurred
0
Stopwatch flag. Indicates that the stopwatch countdown timed out.
SW
0 The stopwatch did not timeout
1 The stopwatch timed out
26.3.7
RTC Interrupt Enable Register (RTC_IER)
The RTC_IER register enables/disables the various real-time clock interrupts. Masking an interrupt bit has
no effect on its corresponding status bit.
Freescale Semiconductor
Table 26-8. RTC_ISR Field Descriptions
n+2
Hz depending on the combination of the RTC oscillator frequency and the programmed value in
Section 26.4.3, "Sampling Timer,"
MCF52277 Reference Manual, Rev. 1
Description
for more details.
Real-Time Clock
26-7
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