DS1875T+ Maxim Integrated Products, DS1875T+ Datasheet - Page 33

• Manufacturer Part Number: DS1875T+
• Description: IC SFP CTRLR/TRIPLEXER 38-TQFN
• Manufacturer: Maxim Integrated Products

Specifications of DS1875T+

• Applications: Fiber Optics
• Interface: I²C
• Voltage - Supply: 2.85 V ~ 3.9 V
• Package / Case: *
• Mounting Type: Surface Mount
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

This register map shows each byte/word (2 bytes) in terms of the row it is on in the memory. The first byte in the row is
located 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.
(HEX)
Read
Access
Write
Access
ROW
ACCESS
00
08
10
18
20
28
30
38
40
48
50
58
60
68
70
78
CODE
<1>
<1>
<1>
<1>
<1>
<1>
ROW NAME
<2>
<1>
<1>
<1>
<1>
<1>
<1>
<0>
THRESHOLD
THRESHOLD
THRESHOLD
THRESHOLD
THRESHOLD
THRESHOLD
VALUES
VALUES
<2>
<0>
SELECT
separately
WARN
See each
ALARM/
bit/byte
PW2 EE
PW2 EE
PW2 EE
PW2 EE
PW2 EE
PW2 EE
TABLE
ADC
ADC
<0>
0
1
______________________________________________________________________________________
0
1
2
3
4
5
PW2
<1>
BYTE 0/8
<5>
All
ALARM
MON1 ALARM HI
MON2 ALARM HI
MON3 ALARM HI
MON4 ALARM HI
<2>
TEMP ALARM HI
EE
EE
EE
EE
EE
EE
DOUT
V
TEMP VALUE
CC
MON3 VALUE
WORD 0
3
ALARM HI
<2>
N/A
All
PON Triplexer and SFP Controller
BYTE 1/9
ALARM
<2>
hardware
EE
EE
EE
EE
EE
EE
DS1875
All and
DIN
<3>
All
2
RESERVED
BYTE 2/A
ALARM
PW2 +
mode
LOWER MEMORY
MON1 ALARM LO
MON2 ALARM LO
MON3 ALARM LO
MON4 ALARM LO
PW2
TEMP ALARM LO
<4>
<2>
<6>
V
bit
EE
EE
EE
EE
EE
EE
CC
V
MON4 VALUE
WORD 1
CC
ALARM LO
1
VALUE
<5>
All
All
BYTE 3/B
ALARM
EE
EE
EE
EE
EE
EE
<6>
0
PWE MSB
<6>
N/A
All
BYTE 4/C
WARN
MON1 WARN HI
MON2 WARN HI
MON3 WARN HI
MON4 WARN HI
TEMP WARN HI
EE
EE
EE
EE
EE
EE
<2>
V
MON1 VALUE
PW1
PW1
<7>
CC
WORD 2
RESERVED
3
Lower Memory Register Map
WARN HI
Register Descriptions
BYTE 5/D
WARN
PW2
PW2
<8>
EE
EE
EE
EE
EE
EE
<6>
2
PWE LSB
PW2
<9>
N/A
RESERVED RESERVED
<0>
BYTE 6/E
STATUS
MON1 WARN LO
MON2 WARN LO
MON3 WARN LO
MON4 WARN LO
TEMP WARN LO
EE
EE
EE
EE
EE
EE
V
MON2 VALUE
CC
WORD 3
<10>
PW2
N/A
WARN LO
<3>
BYTE 7/F
<5>
UPDATE
SEL
EE
EE
EE
EE
EE
EE
<11>
PW1
TBL
All
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