DS12CR887 Maxim, DS12CR887 Datasheet - Page 15

• Manufacturer Part Number: DS12CR887
• Description: The DS12R885 is a functional drop-in replacement for the DS12885 real-time clock (RTC)
• Manufacturer: Maxim

Table 2B. Time, Calendar, and Alarm Data Modes—Binary Mode (DM = 1)
X = Read/Write Bit.
Note: Unless otherwise specified, the state of the registers is not defined when power is first applied. Except for the seconds regis-
ter, 0 bits in the time and date registers can be written to 1, but may be modified when the clock updates. 0 bits should always be
written to 0 except for alarm mask bits.
ADDRESS
0EH-7F
0AH
0BH
0CH
0DH
00H
01H
02H
03H
04H
05H
06H
07H
08H
09H
RTCs with Constant-Voltage Trickle Charger
AM/PM
AM/PM
BIT 7
IRQF
SET
VRT
UIP
X
0
0
0
0
0
0
0
0
0
0
BIT 6
DV2
PIE
PF
X
0
0
0
0
0
0
0
0
0
0
BIT 5
DV1
AIE
AF
X
0
0
0
0
0
0
____________________________________________________________________
BIT 4
DV0
UIE
UF
0
X
0
0
0
0
Year
SQWE
BIT 3
RS3
Seconds
Seconds
Minutes
Minutes
X
0
0
0
Hours
Hours
Date
BIT 2
RS2
DM
0
0
X
Month
Hours
Hours
24/12
BIT 1
RS1
X
0
0
Day
BIT 0
DSE
RS0
X
0
0
Seconds Alarm
Minutes Alarm
Hours Alarm
FUNCTION
Seconds
Minutes
Control
Control
Control
Control
Month
Hours
Date
Year
RAM
Day
01–0C +AM/PM
01–0C +AM/PM
RANGE
00–3B
00–3B
00–3B
00–3B
01–0C
00–17
00–17
01–07
01–1F
00–63
—
—
—
—
—
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