Freescale Semiconductor MPC5200B ユーザーズマニュアル
Real-Time Clock
MPC5200B Users Guide, Rev. 1
Freescale Semiconductor
7-69
7.6.3.3
RTC New Year and Stopwatch Register—MBAR + 0x0808
7.6.3.4
RTC Alarm and Interrupt Enable Register—MBAR + 0x080C
Table 7-58. RTC New Year and Stopwatch Register
msb 0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
R
Reserved
wr
ite_SW
SW_set
W
RESET:
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31 lsb
R
Reserved
Year_set
W
RESET:
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Bits
Name
Description
0:6
—
Reserved
7
write_SW
Typical stopwatch operation is to write initial value into 8-bit wide SW_set and assert
write_SW bit. The write_SW bit is immediately auto cleared, but it triggers the stopwatch
minute countdown to begin.
write_SW bit. The write_SW bit is immediately auto cleared, but it triggers the stopwatch
minute countdown to begin.
8:15
SW_set
Number of minutes to be written into stopwatch. Max is 255, a little over 4 hours.
16:19
—
Reserved
20:31
Year_set
New year written in RTC after successful state machine transition by set_date and
pause_date bits.
pause_date bits.
Note: This is part of date set function in the previous register.
Table 7-59. RTC Alarm and Interrupt Enable Register
msb 0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
R
Reserved
Alm_en
ab
le
Reserved
Alm_24H_set
W
RESET:
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31 lsb
R
Reserved
Alm_Min_set
Reserved
MPEb
In
tEn_da
y
IntEn_min
IntEn_sec
W
RESET:
0
0
0
0
0
0
0
0
0
0
0
0
1
0
0
0
Bits
Name
Description
0:6
—
Reserved
7
Alm_enable
Alarm Enable bit for once-a-day Alarm. If high, Alarm status/interrupt operation is enabled.
If low, Alarm setting is not compared to time of day.
If low, Alarm setting is not compared to time of day.