DS1876 datasheet(28/69 Pages) MAXIM

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SFP Controller with Dual LDD Interface

Lower Memory Register Descriptions

Lower Memory, Register 00h–01h: TEMP ALARM HI

Lower Memory, Register 04h–05h: TEMP WARN HI

Lower Memory, Register 02h–03h: TEMP ALARM LO

Lower Memory, Register 06h–07h: TEMP WARN LO

FACTORY DEFAULT

7FFFh

READ ACCESS

All

WRITE ACCESS

PW2 or (PW1 and WLOWER)

A2h AND B2h MEMORY

Common A2h and B2h memory location

MEMORY TYPE

Nonvolatile (SEE)

00h, 04h

01h, 05h

2-1

2-2

2-3

2-4

2-5

2-6

2-7

2-8

BIT 7

BIT 0

Temperature measurement updates above this two’s complement threshold set its corresponding alarm or

warning bit. Temperature measurement updates equal to or below this threshold clear its alarm or warning bit.

FACTORY DEFAULT

8000h

READ ACCESS

All

WRITE ACCESS

PW2 or (PW1 and WLOWER)

A2h AND B2h MEMORY

Common A2h and B2h memory location

MEMORY TYPE

Nonvolatile (SEE)

02h, 06h

03h, 07h

2-1

2-2

2-3

2-4

2-5

2-6

2-7

2-8

BIT 7

BIT 0

Temperature measurement updates below this two’s complement threshold set its corresponding alarm or

warning bit. Temperature measurement updates equal to or above this threshold clear its alarm or warning bit.

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