DS1877T+TR MAXIM [Maxim Integrated Products], DS1877T+TR Datasheet - Page 52

• Manufacturer Part Number: DS1877T+TR
• Description: SFP Controller for Dual Rx Interface
• Manufacturer: MAXIM [Maxim Integrated Products]

SFP Controller for Dual Rx Interface
Table 02h, Register B0h–B3h: PW1
Table 02h, Register B4h–B7h: PW2
52
B0h
B1h
B2h
B3h
B4h
B5h
B6h
B7h
FACTORY DEFAULT
READ ACCESS
WRITE ACCESS
MEMORY TYPE
FACTORY DEFAULT
READ ACCESS
WRITE ACCESS
MEMORY TYPE
The PWE value is compared against the value written to this location to enable PW1 access. At power-on, the
PWE value is set to all ones. Thus, writing these bytes to all ones grants PW1 access on power-on without writing
the password entry. All reads of this register are 00h.
The PWE value is compared against the value written to this location to enable PW2 access. At power-on, the
PWE value is set to all ones. Thus, writing these bytes to all ones grants PW2 access on power-on without writing
the password entry. All reads of this register are 00h.
BIT 7
BIT 7
2
2
2
2
2
2
2
2
31
23
15
31
23
15
7
7
2
2
2
2
2
2
2
2
30
22
14
30
22
14
6
6
FFFF FFFFh
N/A
PW2 or (PW1 and WPW1)
Nonvolatile (SEE)
FFFF FFFFh
N/A
PW2
Nonvolatile (SEE)
2
2
2
2
2
2
2
2
29
21
13
29
21
13
5
5
2
2
2
2
2
2
2
2
28
20
12
28
20
12
4
4
2
2
2
2
2
2
2
2
27
19
11
27
19
11
3
3
2
2
2
2
2
2
2
2
26
18
10
26
18
10
2
2
2
2
2
2
2
2
2
2
25
17
25
17
9
1
9
1
BIT 0
BIT 0
2
2
2
2
2
2
2
2
24
16
24
16
8
0
8
0