RV-4162 Datasheet, PDF (10/39 Pages) MICORO CRYSTAL SWITZERLAND – Ultra Small Real Time Clock

Micro Crystal
Ultra Small Real Time Clock / Calendar Module
RV-4162
3.3. REGISTER OVERVIEW
Clock Section (addresses 00h through 07h):
These registers are coded in BCD format and contain the century, year, month, day / date, hour, minute, second
and tenths/hundredths of a second in 24-hour format. Corrections for 28, 29 (leap year), 30 or 31day months are
made automatically. These registers are accessed indirectly through transfer registers.
Control Section (addresses 08h through 0Fh):
These registers are coded in binary format and provide status, frequency compensation, alarm and control of the
peripheral functions incl. the programmable clock-output and watchdog functions.
Address
00h
01h
02h
03h
04h
05h
06h
07h
08h
09h
0Ah
0Bh
0Ch
0Dh
0Eh
0Fh
Function
10^th / 100^th Second
Seconds
Minutes
Hours
Day
Date
Month / Century
Years
Freq. Compensation
Watchdog
Month Alarm
Date Alarm
Hour Alarm
Minute Alarm
Second Alarm
Flags
Bit 7
8
OS
OFIE
0
FD3
0
CB1
80
OUT
WD2
AFE
ARM4
ARM3
ARM2
ARM1
WDF
Bit 6
Bit 5
10^th of Second
4
2
40
20
40
20
0
20
FD2
FD1
0
20
CB0
0
40
20
0
Mode
WDM4 WDM3
CLKOE
0
ARM5
20
0
20
40
20
40
20
AF
0
Bit positions labelled with 0 should always be written with logic “0”.
Bit 4
1
10
10
10
FD0
10
10
10
16
WDM2
10
10
10
10
10
0
Bit 3
8
8
8
8
0
8
8
8
8
WDM1
8
8
8
8
8
0
Bit 2
Bit 1
100^th of Second
4
2
4
2
4
2
4
2
4
2
4
2
4
2
4
2
4
2
WDM0 WD1
4
2
4
2
4
2
4
2
4
2
OF
0
Bit 0
1
1
1
1
1
1
1
1
1
WD0
1
1
1
1
1
0
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