DS1877T+T&R Maxim Integrated Products, DS1877T+T&R Datasheet - Page 39

• Manufacturer Part Number: DS1877T+T&R
• Description: IC CTLR/MON SFP 1-2CH 28TQFN
• Manufacturer: Maxim Integrated Products
• Type: SFP+ Controllerr

Specifications of DS1877T+T&R

• Input Type: Logic
• Output Type: Logic
• Interface: I²C
• Current - Supply: 2.5mA
• Mounting Type: Surface Mount
• Package / Case: 28-WFQFN exposed Pad
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 90-1877T+TRL

Lower Memory, Registers 75h–7Ah: RESERVED
Lower Memory, Registers 7Bh–7Eh: PASSWORD ENTRY (PWE)
Lower Memory, Register 7Fh: TABLE SELECT (TBL SEL)
7Ch
7Dh
7Bh
7Fh
7Eh
POWER-ON VALUE
READ ACCESS
WRITE ACCESS
A2h AND B2h MEMORY
MEMORY TYPE
These registers are reserved. The value when read is 00h.
POWER-ON VALUE
READ ACCESS
WRITE ACCESS
A2h AND B2h MEMORY
MEMORY TYPE
The upper memory tables of the device are accessible by writing the desired table value in this register. The power-
on value of this register is defined by the value written to TBLSELPON (Table 02h, Register C7h).
POWER-ON VALUE
READ ACCESS
WRITE ACCESS
A2h AND B2h MEMORY
MEMORY TYPE
There are two passwords for the device. Each password is 4 bytes long. The lower level password (PW1) has all
the access of a normal user plus those made available with PW1. The higher level password (PW2) has all the
access of PW1 plus those made available with PW2. The values of the passwords reside in EEPROM inside PW2
memory. At power-up, all PWE bits are set to 1. All reads at this location are 0.
BIT 7
BIT 7
2
2
2
2
2
31
23
15
7
7
SFP Controller for Dual Rx Interface
2
2
2
2
2
30
22
14
6
6
00h
N/A
N/A
N/A
N/A
TBLSELPON (Table 02h, Register C7h)
All
All
Different A2h and B2h memory locations
Volatile
FFFF FFFFh
N/A
All
Common A2h and B2h memory locations
Volatile
2
2
2
2
2
29
21
13
5
5
2
2
2
2
2
28
20
12
4
4
2
2
2
2
2
27
19
11
3
3
2
2
2
2
2
26
18
10
2
2
2
2
2
2
2
25
17
9
1
1
BIT 0
BIT 0
2
2
2
2
2
24
16
8
0
0
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