RV-8564 Datasheet, PDF (13/40 Pages) MICORO CRYSTAL SWITZERLAND – I2C-Bus Interface Real Time Clock

Micro Crystal
Real Time Clock / Calendar Module
RV-8564
8.3.7.YEARS (address 08h…bits description)
Address
08h
Function
Years
Bit 7
80
Bit 6
40
Bit 5
20
Bit 4
10
Bit 3
8
Bit 2
4
Bit 1
2
Bit 0
1
Bit
7 to 0
Symbol
Years
Value
0 to 99
Description
This register holds the current year coded in BCD format¹⁾
1) _{When the register Years overflows from 99 to 00, the century bit C in the register Months is toggled.}
Note:
The RV-8564 compensates for leap years by adding a 29^th day to February if the year counter contains a value
which is divisible by 4, including 00.
8.4.ALARM REGISTERS
8.4.1.MINUTE ALARM (address 09h…bits description)
Address
09h
Function
Minute Alarm
Bit 7
AE_M
Bit 6
40
Bit 5
20
Bit 4
10
Bit 3
8
Bit 2
4
Bit 1
2
Bit 0
1
Bit
7
6 to 0
Symbol
AE_M
Minute Alarm
Value
0
1¹⁾
0 to 59
Description
Minute Alarm in enabled
Minute Alarm is disabled
Minute Alarm information coded in BCD format
1) _{Default value.}
8.4.2.HOUR ALARM (address 0Ah…bits description)
Address
0Ah
Function
Hour Alarm
Bit 7
AE_H
Bit 6
X
Bit 5
20
Bit 4
10
Bit 3
8
Bit 2
4
Bit 1
2
Bit 0
1
Bit
7
6
5 to 0
Symbol
AE_H
X
Hour Alarm
Value
0
1¹⁾
-
0 to 23
Description
Hour Alarm in enabled
Hour Alarm is disabled
Unused
Hour Alarm information coded in BCD format
1) _{Default value.}
8.4.3.DAY ALARM (address 0Bh…bits description)
Address
0Bh
Function
Day Alarm
Bit 7
AE_D
Bit 6
X
Bit 5
20
Bit 4
10
Bit 3
8
Bit 2
4
Bit
7
6
5 to 0
1) _{Default value.}
Symbol
AE_D
X
Day Alarm
Value
0
1¹⁾
-
1 to 31
Description
Day Alarm in enabled
Day Alarm is disabled
Unused
Day Alarm information coded in BCD format
Bit 1
2
Bit 0
1
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