RV-8523 Datasheet, PDF (15/57 Pages) MICORO CRYSTAL SWITZERLAND – Real Time Clock

Micro Crystal
Real Time Clock / Calendar Module
RV-8523
8.3.7.YEARS (address 09h…bits description)
Address
09h
Function
Years
Bit 7
80
Bit 6
40
Bit 5
20
Bit 4
10
Bit 3
8
Bit 2
4
Bit 1
2
Bit
7 to 0
Symbol
Years
Value
0 to 99
Description
This register holds the current year coded in BCD format
8.4.ALARM REGISTERS
The registers at addresses 0Ah through 0Dh contain the alarm information.
8.4.1.MINUTE ALARM (address 0Ah…bits description)
Address
0Ah
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
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 0Bh…bits description)
12 hour mode¹⁾
Address
Function
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
0Bh
Hour Alarm
AE_H
X
AMPM
10
8
4
Bit 1
2
Bit 0
1
Bit 0
1
Bit 0
1
Bit
7
6
5
4 to 0
Symbol
AE_H
X
AMPM
Hour Alarm
Value
0
1²⁾
-
0
1
1 to 12
1) _{Hour mode is set by bit 12_24 in register Control 1.}
2) _{Default value.}
Description
Hour Alarm in enabled
Hour Alarm is disabled
Unused
Indicates AM
Indicates PM
Hour Alarm information in 12 hour mode coded in BCD format
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