DS1371 Maxim, DS1371 Datasheet - Page 8

• Manufacturer Part Number: DS1371
• Description: The DS1371 is a 32-bit binary counter that is designed to continuously count time in seconds
• Manufacturer: Maxim

Address Map
Table 2 shows the address map for the registers of the DS1371. During a multibyte access, when the
address pointer reaches the end of the register space (08h), it wraps around to location 00h. On an I
START, STOP, or address pointer incrementing to location 00h, the current time is transferred to a
second set of registers. The time information is read from these secondary registers, while the clock may
continue to run. This eliminates the need to reread the registers in case of an update of the main registers
during a read.
Table 2. Address Map
Note: Unless otherwise specified, the state of the registers are not defined when power is first applied.
ADDRESS
00H
01H
02H
03H
04H
05H
06H
07H
08H
EOSC
BIT 7
OSF
WACE
BIT 6
0
WD/ALM
BIT 5
WD/ALM COUNTER BYTE 0
WD/ALM COUNTER BYTE 1
WD/ALM COUNTER BYTE 2
0
TOD COUNTER BYTE 0
TOD COUNTER BYTE 1
TOD COUNTER BYTE 2
TOD COUNTER BYTE 3
BIT 4 BIT 3
0
0
8 of 15
INTCN
0
BIT 2
RS2
0
BIT 1
RS1
0
BIT 0
AIE
AF
Alarm Counter
Alarm Counter
Alarm Counter
FUNCTION
Time-of-Day
Time-of-Day
Time-of-Day
Time-of-Day
Watchdog/
Watchdog/
Watchdog/
Counter
Counter
Counter
Counter
Control
Status
2
C