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12.7.4 Real-Time Clock Alarm Register
The 32-bit read/write real-time clock alarm (RTCAL) register is an alarm reference register.
When the RTC register increments to the value stored in this register, an alarm interrupt is
generated.
RTCAL
BIT
0
1
2
FIELD
RESET
R/W
ADDR
BIT
16
17
18
FIELD
RESET
R/W
ADDR
NOTE: — = Undefined.
ALARM—Alarm Reference Counter
This field indicates that an alarm interrupt will be generated as soon as there is a match
between this field and the corresponding bits in the RTC register. The alarm has a 1 second
resolution.
MOTOROLA
3
4
5
6
7
ALARM
—
R/W
(IMMR & 0xFFFF0000) + 0x22C
19
20
21
22
23
ALARM
—
R/W
(IMMR & 0xFFFF0000) + 0x22E
MPC823e REFERENCE MANUAL
System Interface Unit
8
9
10
11
12
24
25
26
27
28
13
14
15
29
30
31
12-21
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