DS1874 datasheet(30/88 Pages) MAXIM

30 / 88 page

The register maps show each byte/word (2 bytes) in terms of its row in the memory. The first byte in the row is locat-

ed in memory at the row address (hexadecimal) in the leftmost column. Each subsequent byte on the row is one/two

memory locations beyond the previous byte/word’s address. A total of 8 bytes are present on each row. For more

information about each of these bytes see the corresponding register description.

Lower Memory Register Map

SFP+ Controller with Digital LDD Interface

______________________________________________________________________________________

LOWER MEMORY

WORD 0

WORD 1

WORD 2

WORD 3

ROW

(hex)

ROW NAME

BYTE 0/8

BYTE 1/9

BYTE 2/A

BYTE 3/B

BYTE 4/C

BYTE 5/D

BYTE 6/E

BYTE 7/F

<1>THRESHOLD0

TEMP ALARM HI

TEMP ALARM LO

TEMP WARN HI

TEMP WARN LO

<1>THRESHOLD1

VCC ALARM HI

VCC ALARM LO

VCC WARN HI

VCC WARN LO

<1>THRESHOLD2

MON1 ALARM HI

MON1 ALARM LO

MON1 WARN HI

MON1 WARN LO

<1>THRESHOLD3

MON2 ALARM HI

MON2 ALARM LO

MON2 WARN HI

MON2 WARN LO

<1>THRESHOLD4

MON3 ALARM HI

MON3 ALARM LO

MON3 WARN HI

MON3 WARN LO

<1>THRESHOLD5

MON4 ALARM HI

MON4 ALARM LO

MON4 WARN HI

MON4 WARN LO

30–5F

<1>EEPROM

<2>ADC

VALUES0

TEMP VALUE

VCC VALUE

MON1 VALUE

MON2 VALUE

<0>ADC

VALUES1

<2>MON3 VALUE

<2>MON4 VALUE

<2>RESERVED

<0>STATUS <5>UPDATE

<2>ALARM/

WARN

ALARM3

ALARM2

ALARM1

ALARM0

WARN3

WARN2

RESERVED

<0>TABLE

SELECT

<5>RESERVED

<5>

RESERVED

<6>PWE MSW

<6>PWE LSW

<5>TBL

SEL

ACCESS

CODE

<0>

<1>

<2>

<3>

<4>

<5>

<6>

<7>

<8>

<9>

<10>

<11>

Read

Access

All

PW2

All

N/A

PW1

PW2

N/A

PW2

All

Write

Access

See each

bit/byte

separately

PW2

N/A

All and

DS1874

hardware

PW2 +

mode

bit

All

PW1

PW2

N/A

PW1

DS1874 Datasheet(PDF) 30 Page - Maxim Integrated Products

DS1874 Datasheet(HTML) 30 Page - Maxim Integrated Products

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88

Datasheet Download

Link URL