RV-8523 Datasheet, PDF (11/57 Pages) MICORO CRYSTAL SWITZERLAND – Real Time Clock

Micro Crystal
Real Time Clock / Calendar Module
RV-8523
8.2.2.CONTROL 2 (address 01h…bits description)
Address
01h
Function
Control 2
Bit 7
WTAF
Bit 6
CTAF
Bit 5
CTBF
Bit 4
SF
Bit 3
AF
Bit 2
WTAIE
Bit 1
CTAIE
Bit 0
CTBIE
Bit
Symbol
7
WTAF
6
CTAF
5
CTBF
4
SF
3
AF
2
WTAIE
1
CTAIE
0
CTBIE
Value
0¹⁾
1
0¹⁾
1
0¹⁾
1
0¹⁾
1
0¹⁾
1
0¹⁾
1
0¹⁾
1
0¹⁾
1
Description
No watchdog timer A interrupt generated
Flag set when watchdog timer A interrupt generated
Flag is read-only and cleared by reading register
Control 2
No countdown timer A interrupt generated
Flag set when countdown timer A interrupt generated
Flag must be cleared to clear interrupt
No countdown timer B interrupt generated
Flag set when countdown timer B interrupt generated
Flag must be cleared to clear interrupt
No second interrupt generated
Flag set when second interrupt generated
Flag must be cleared to clear interrupt
No alarm interrupt generated
Flag set when alarm triggered
Flag must be cleared to clear interrupt
Watchdog timer A interrupt is disabled
Watchdog timer A interrupt is enabled
Countdown timer A interrupt is disabled
Countdown timer A interrupt is enabled
Countdown timer B interrupt is disabled
Countdown timer B interrupt is enabled
Reference
1) _{Default value.}
8.2.3.CONTROL 3 (address 02h…bits description)
Address
02h
Function
Control 3
Bit 7
PM2
Bit 6
PM1
Bit 5
PM0
Bit 4
X
Bit 3
BSF
Bit 2
BLF
Bit 1
BSIE
Bit 0
BLIE
Bit
7 to 5
4
3
Symbol
PM[2:0]
X
BSF
2
BLF
1
BSIE
0
BLIE
1) _{Default value is 111.}
2) _{Default value.}
Value
000 to 111
-
0²⁾
1
0²⁾
1
0²⁾
1
0²⁾
1
Description
Battery switchover and battery low detection control¹⁾
Unused
No battery switchover interrupt generated
Flag set when battery switchover occurs
Flag must be cleared to clear interrupt
Battery status ok
Battery status low; flag is read-only
No interrupt generated from battery switchover flag
BSF
Interrupt generated when BSF is set
No interrupt generated from battery low flag BLF
Interrupt generated when BLF is set
Reference
See section 9.2.
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