Real-Time Clock
MCF52235 ColdFire® Integrated Microcontroller Reference Manual, Rev. 6
8-3
Freescale Semiconductor
8.2.1
RTC Hours and Minutes Counter Register (HOURMIN)
The real-time clock hours and minutes counter register (HOURMIN) is used to program the hours and
minutes for the TOD clock. It can be read or written at any time. After a write, the time changes to the new
value. A power-on reset (POR) sets the RTC to the reset values shown in
.
Figure 8-2. RTC Hours and Minutes Counter Register (HOURMIN)
8.2.2
RTC Seconds Counter Register (SECONDS)
The real-time clock seconds register (SECONDS) is used to program the seconds for the TOD clock. It
can be read or written at any time. After a write, the time changes to the new value. A power-on reset
(POR) sets the RTC to the reset values shown in
.
0x03E4
RTC Day Alarm Register (ALRM_DAY)
read/write
0x03F0
Reserved
—
IPSBAR
Offset: 0x03C0 (HOURMIN)
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
Reset
1
1
After power-on reset (POR)
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
R
0
0
0
HOURS
0
0
MINUTES
W
0
0
0
?
?
?
?
?
0
0
?
?
?
?
?
?
Table 8-2. HOURMIN Field Descriptions
Field
Description
31–13
Reserved, should be cleared.
12–8
HOURS
Hour setting; can be set to any value between 0 and 23.
7–6
Reserved, should be cleared.
5–0
MINUTES
Minutes setting; can be set to any value between 0 and 59.
Table 8-1. RTC Module Register Memory Map (continued)
IPSBAR Offset
Use
Access
Because
of
an
order
from
the
United
States
International
Trade
Commission,
BGA-packaged
product
lines
and
part
numbers
indicated
here
currently
are
not
available
from
Freescale
for
import
or
sale
in
the
United
States
prior
to
September
2010:MCF52234CVM60,
MCF52235CVM60
