RV-8523 Datasheet, PDF (10/57 Pages) MICORO CRYSTAL SWITZERLAND – Real Time Clock

Micro Crystal
Real Time Clock / Calendar Module
RV-8523
8.2. CONTROL REGISTERS
8.2.1.CONTROL 1 (address 00h…bits description)
Address
00h
Function
Control 1
Bit 7
CAP
Bit 6
N
Bit 5
STOP
Bit 4
SR
Bit 3
12_24
Bit 2
SIE
Bit 1
AIE
Bit 0
CIE
Bit
Symbol
7
CAP
6
N
5
STOP
4
SR
3
12_24
2
SIE
1
AIE
0
CIE
Value
0¹⁾
0^{1) 2)}
0¹⁾
1
0^{1) 3)}
1
0¹⁾
1
0¹⁾
1
0¹⁾
1
0¹⁾
1
Description
Must be set to logic 0 for normal operations
Unused
RTC time circuits running
RTC time circuits frozen
RTC divider chain flip-flops are asynchronously set to
logic 0
CLKOUT at 32.768 kHz, 16.384 kHz, or 8.192 kHz is
still available
No software reset
Initiate software reset
24 hour mode is selected
12 hour mode is selected
Second interrupt disabled
Second interrupt enabled
Alarm interrupt disabled
Alarm interrupt enabled
No correction interrupt generated
Interrupt pulses are generated at every correction
cycles
Reference
See section 8.5.
1) _{Default value.}
2) _{Bit labeled as “N” must always be written with logic 0.}
3) _{For a software reset, 01011000 (58h) must be sent to register Control 1 (see section 8.7.). Bit SR always returns 0 when read.}
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