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Real-Time Clock
MCF52211 ColdFire® Integrated Microcontroller Reference Manual, Rev. 2
11-12 Freescale Semiconductor
11.2.1.10 RTC Day Alarm Register (ALRM_DAY)
The real-time clock day alarm (ALRM_DAY) register is used to configure the day for the alarm. The alarm
settings can be read or written at any time.
Figure 11-11. RTC Day Alarm Register (ALRM_DAY)
11.2.1.11 RTC General Oscillator Count Registers (RTCGOCU and RTCGOCL)
The real-time clock general oscillator count registers (RTCGOCU and RTCGOCL) contain the upper and
lower 16 bits of a 32-bit field, RTCGOCNT. This field is used to control the 1 Hz clock and the sampling
clock as described in Section 11.3, “Functional Description”.
Figure 11-12. RTC General Oscillator Count Upper Register (RTCGOCU)
IPSBAR
Offset: 0x03E4 (ALRM_DAY)
Access: User read/write
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
R 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
W
Reset0000000000000000
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
R
DAYSAL
W
Reset0000000000000000
Table 11-11. ALRM_DAY Field Descriptions
Field Description
31–16 Reserved, should be cleared.
15–0
DAYSAL
Day Setting of the Alarm. This field can be set to any value between 0 and 65535.
IPSBAR
Offset: 0x03F4 (RTCGOCU)
Access: User read/write
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
R
RTCGOCNT[31:16]
W
Reset0000000000000000
Table 11-12. RTCGOCU Field Descriptions
Field Description
15–0
RTCGOCNT[31:16]
RTC general oscillator count, bits 31:16. This field is used to control the 1 Hz clock and the sampling
clock as described in Section 11.3, “Functional Description”.