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RV-8523 Datasheet(PDF) 9 Page - MICORO CRYSTAL SWITZERLAND

Part # RV-8523
Description  Real Time Clock
Download  57 Pages
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Manufacturer  MICROCRYSTAL [MICORO CRYSTAL SWITZERLAND]
Direct Link  http://www.microcrystal.com
Logo MICROCRYSTAL - MICORO CRYSTAL SWITZERLAND

RV-8523 Datasheet(HTML) 9 Page - MICORO CRYSTAL SWITZERLAND

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Micro Crystal
Real Time Clock / Calendar Module
RV-8523
9/57
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
Function
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
00h
Control 1
CAP
N
STOP
SR
12_24
SIE
AIE
CIE
01h
Control 2
WTAF
CTAF
CTBF
SF
AF
WTAIE
CTAIE
CTBIE
02h
Control 3
PM2
PM1
PM0
X
BSF
BLF
BSIE
BLIE
03h
Seconds
OS
40
20
10
8
4
2
1
04h
Minutes
X
40
20
10
8
4
2
1
05h
Hours in 12 h mode
X
X
AMPM
10
8
4
2
1
Hours in 24 h mode
X
X
20
10
8
4
2
1
06h
Days
X
X
20
10
8
4
2
1
07h
Weekdays
X
X
X
X
X
4
2
1
08h
Months
X
X
X
10
8
4
2
1
09h
Years
80
40
20
10
8
4
2
1
0Ah
Minute Alarm
AE_M
40
20
10
8
4
2
1
0Bh
Hour Alarm in 12 h mode
AE_H
X
AMPM
10
8
4
2
1
Hour Alarm in 24 h mode
AE_H
X
20
10
8
4
2
1
0Ch
Day Alarm
AE_D
X
20
10
8
4
2
1
0Dh
Weekday Alarm
AE_W
X
X
X
X
4
2
1
0Eh
Frequency Offset
MODE
Offset value
0Fh
Timer & CLKOUT
TAM
TBM
COF2
COF1
COF0
TAC1
TAC0
TBC
10h
Timer A Clock
X
X
X
X
X
TAQ2
TAQ1
TAQ0
11h
Timer A
128
64
32
16
8
4
2
1
12h
Timer B Clock
X
TBW2
TBW1
TBW0
X
TBQ2
TBQ1
TBQ0
13h
Timer B
128
64
32
16
8
4
2
1
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.


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