Xycom XVME-113, User Manual

Page: 40 / 75

Chapter 3 – Real Time Clock
3-4
Table 3-3. RTC Register Map
RTC
Reg.
Offset
Bit Definitions Register Name
01h * 1 Hz 2 Hz 4 Hz 8 Hz 16 Hz 32 Hz 64 Hz 64 Hz Counter
03h * c-s
40
c-s
20
c-s
10
c-s
8
c-s
4
c-s
2
c-s
1
Seconds Counter
05h * c-mi
40
c-mi
20
c-mi
10
c-mi
8
c-mi
4
c-mi
2
c-mi
1
Minutes Counter
07h * * c-h
20
c-h
10
c-h
8
c-h
4
c-h
2
c-h
1
Hours Counter
09h * * * * * c-w
4
c-w
2
c-w
1
Day of Week Counter
0Bh * * c-d
20
c-d
10
c-d
8
c-d
4
c-d
2
c-d
1
Day Counter
0Dh * * * c-mo
10
c-mo
8
c-mo
4
c-mo
2
c-mo
1
Month Counter
0Fh c-y
80
c-y
40
c-y
20
c-y
10
c-y
8
c-y
4
c-y
2
c-y
1
Year Counter
11h ENB 1 Hz 2 Hz 4 Hz 8 Hz 16 Hz 32 Hz 64 Hz 64 Hz Alarm
13h ENB a-s
40
a-s
20
a-s
10
a-s
8
a-s
4
a-s
2
a-s
1
Seconds Alarm
15h ENB a-mi
40
a-mi
20
a-mi
10
a-mi
8
a-mi
4
a-mi
2
a-mi
1
Minutes Alarm
17h ENB * a-h
20
a-h
10
a-h
8
a-h
4
a-h
2
a-h
1
Hours Alarm
19h ENB * * * * a-w
4
a-w
2
a-w
1
Day of Week Alarm
1Bh ENB * a-d
20
a-d
10
a-d
8
a-d
4
a-d
2
a-d
1
Day Alarm
1Dh CF * * CIE AIE * * AF Control
Register A
1Fh RAM
7
RAM
6
RAM
5
RAM
4
TEST 30 sec
ADJ
RESET Start/
Stop
Control
Register B
NOTE
Bits indicated by '*' are unused. These bits are unchanged during write operations and
will always read '0' during read operations.