DS1371

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Address Map

Table 2 shows the address map for the registers of the DS1371. During a multibyte access, when the

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

ADDRESS

BIT 7

BIT 6

BIT 5

BIT 4

BIT 3

BIT 2

BIT 1

BIT 0

FUNCTION

00H

TOD COUNTER BYTE 0

Time-of-Day

Counter

01H

TOD COUNTER BYTE 1

Time-of-Day

Counter

02H

TOD COUNTER BYTE 2

Time-of-Day

Counter

03H

TOD COUNTER BYTE 3

Time-of-Day

Counter

04H

WD/

ALM COUNTER BYTE 0

Watchdog/

Alarm Counter

05H

WD/

ALM COUNTER BYTE 1

Watchdog/

Alarm Counter

06H

WD/

ALM COUNTER BYTE 2

Watchdog/

Alarm Counter

07H

EOSC

0

INTCN

RS2

RS1

AIE

Control

08H

OSF

0

0

0

0

0

0

AF

Status

Note: Unless otherwise specified, the state of the registers are not defined when power is first applied.