Datasheet

DS1878
SFP+ Controller with Digital LDD Interface
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Lower Memory Register Descriptions
Lower Memory, Register 00h–01h: TEMP ALARM HI
Lower Memory, Register 04h–05h: TEMP WARN HI
FACTORY DEFAULT 7FFFh
READ ACCESS All
WRITE ACCESS PW2
MEMORY TYPE Nonvolatile (SEE)
00h, 04h S 2
6
2
5
2
4
2
3
2
2
2
1
2
0
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 corresponding alarm or warning
bits. Temperature measurement updates equal to or below this threshold clear alarm or warning bits.
Lower Memory, Register 02h–03h: TEMP ALARM LO
Lower Memory, Register 06h–07h: TEMP WARN LO
FACTORY DEFAULT 8000h
READ ACCESS All
WRITE ACCESS PW2
MEMORY TYPE Nonvolatile (SEE)
02h, 06h S 2
6
2
5
2
4
2
3
2
2
2
1
2
0
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 corresponding alarm or warning
bits. Temperature measurement updates equal to or above this threshold clear alarm or warning bits.