DS3065WP
3.3V, 8Mb, Nonvolatile SRAM with Clock
Table 3 . RTC Register Map
ADDR
B7
B6
B5
DATA
B4
B3
B2
B1
B0
FUNCTION
RANGE
xxxxFh
10 YEAR
YEAR
YEAR
00–99
xxxxEh
xxxxDh
X
X
X
X
X
10 MO
10 DATE
MONTH
DATE
MONTH
DATE
01–12
01–31
xxxxCh
xxxxBh
X
X
FT
X
X
10 HOUR
X
X
HOUR
DAY
DAY
HOUR
01–07
00–23
xxxxAh
xxxx9h
X
OSC
10 MINUTES
10 SECONDS
MINUTES
SECONDS
MINUTES
SECONDS
00–59
00–59
xxxx8h
W
R
10 CENTURY
CENTURY
CONTROL
00–39
xxxx7h
xxxx6h
Y
AE
Y
Y
Y
ABE
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Unused
INTERRUPTS
xxxx5h
xxxx4h
xxxx3h
xxxx2h
AM4
AM3
AM2
AM1
Y
Y
10 DATE
10 HR
10 MINUTES
10 SECONDS
DATE
HOURS
MINUTES
SECONDS
ALARM
DATE
ALARM
HOURS
ALARM
MINUTES
ALARM
SECONDS
01–31
00–23
00–59
00–59
xxxx1h
xxxx0h
Y
WF
Y
AF
Y
0
Y
BLF
Y
0
Y
0
Y
0
Y
0
Unused
FLAGS
x=
X=
Y=
0=
FT =
OSC =
W=
Don’t care address bits
Unused; read/writable under write and read bit control
Unused; read/writable without write and read bit control
Reads as 0 and cannot be changed
Frequency test bit
Oscillator start/stop bit
Write bit
R=
AE =
ABE =
AM[4:1] =
WF =
AF =
BLF =
Read bit
Alarm flag enable
Alarm in backup-mode enable
Alarm mask bits
Watchdog flag
Alarm flag
Battery-low flag
Maxim Integrated
13
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