Rtc Interrupt Enable Register; Table 11-9 Real-Time Interrupt Frequency Settings - Motorola MC68VZ328 User Manual

Programming Model
Table 11-8. RTC Interrupt Status Register Description (Continued)
Name
MIN Minute Flag—If enabled, this bit is set every
Bit 1 increment of the minute counter in the TOD
clock.
SW Stopwatch Flag—If enabled, the stopwatch
Bit 0 flag is set when the stopwatch minute count-
down times out.
Real-Time
Interrupt
Frequency
RFE7
RFE6
RFE5
RFE4
RFE3
RFE2
RFE1
RFE0
11.2.8

RTC Interrupt Enable Register

The RTC interrupt enable register (RTCIENR) is used to enable the interrupts in the RTCSIR if the
corresponding bit is set. The settings for the RTCIENR register are described in Table 11-10 on
page 11-13. For information about the frequency of the real-time interrupts, refer to Table 11-9.
11-12
Description
Table 11-9. Real-Time Interrupt Frequency Settings
32.768 kHz
Reference Clock
512 Hz 1.9531 ms
256 Hz 3.9062 ms
128 Hz 7.8125 ms
64 Hz 15.625 ms
32 Hz 31.25 ms
16 Hz
8 Hz
4 Hz
MC68VZ328 User's Manual
0 = No 1-minute interrupt occurred.
1 = A 1-minute interrupt has occurred.
0 = The stopwatch did not time out.
1 = The stopwatch timed out.
600 Hz
300 Hz
150 Hz
75 Hz
37.5 Hz
62.5 ms 18.75 Hz
125 ms 9.375 Hz
250 ms 4.6875 Hz
Setting
38.4 kHz
Reference Clock
1.6666 ms
3.3333 ms
6.6666 ms
13.3333 ms
26.6666 ms
53.3333 ms
106.6666 ms
213.3333 ms