Rainbow-electronics DS1371 Manual do Utilizador descarregar pdf (Página 8)

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

address pointer reaches the end of the register space (08h), it wraps around to location 00h. On a 2-wire

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

WACE

WD/

ALM

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.

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