RV-8523 Datasheet, PDF (9/57 Pages) MICORO CRYSTAL SWITZERLAND – Real Time Clock

Micro Crystal
Real Time Clock / Calendar Module
RV-8523
8. REGISTER ORGANIZATION
8.1. REGISTER OVERVIEW
The 20 registers of the RV-8523 are auto-incrementing after each read or write data byte up to register 13h. After
register 13h, the auto-incrementing will wrap around to address 00h.
Auto-incrementing of the registers:
Address
00h
01h
02h
03h
04h
05h
06h
07h
08h
09h
0Ah
0Bh
0Ch
0Dh
0Eh
0Fh
10h
11h
12h
13h
Function
Control 1
Control 2
Control 3
Seconds
Minutes
Hours in 12 h mode
Hours in 24 h mode
Days
Weekdays
Months
Years
Minute Alarm
Hour Alarm in 12 h mode
Hour Alarm in 24 h mode
Day Alarm
Weekday Alarm
Frequency Offset
Timer & CLKOUT
Timer A Clock
Timer A
Timer B Clock
Timer B
Bit 7
CAP
WTAF
PM2
OS
X
X
X
X
X
X
80
AE_M
AE_H
AE_H
AE_D
AE_W
MODE
TAM
X
128
X
128
Bit 6
Bit 5
N
STOP
CTAF CTBF
PM1
PM0
40
20
40
20
X
AMPM
X
20
X
20
X
X
X
X
40
20
40
20
X
AMPM
X
20
X
20
X
X
Offset value
TBM
COF2
X
X
64
32
TBW2 TBW1
64
32
Bit positions labeled as “X” are not implemented and will return 0 when read.
Bit position labeled as “N” must always be written with logic 0.
Bit 4
SR
SF
X
10
10
10
10
10
X
10
10
10
10
10
10
X
COF1
X
16
TBW0
16
Bit 3
12_24
AF
BSF
8
8
8
8
8
X
8
8
8
8
8
8
X
Bit 2
SIE
WTAIE
BLF
4
4
4
4
4
4
4
4
4
4
4
4
4
Bit 1
AIE
CTAIE
BSIE
2
2
2
2
2
2
2
2
2
2
2
2
2
COF0
X
8
X
8
TAC1
TAQ2
4
TBQ2
4
TAC0
TAQ1
2
TBQ1
2
Bit 0
CIE
CTBIE
BLIE
1
1
1
1
1
1
1
1
1
1
1
1
1
TBC
TAQ0
1
TBQ0
1
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