Datasheet

49Maxim Integrated
SFP Controller for Dual Rx Interface
DS1877
Table 02h, Register 8Eh: RIGHT-SHIFT
2
(RSHIFT
2
)
Table 02h, Register 8Fh: RIGHT-SHIFT
1
(RSHIFT
1
)
Table 02h, Register 90h–91h: RESERVED
FACTORY DEFAULT 00h
READ ACCESS PW2 or (PW1 and RWTBL2) or (PW1 and RTBL2)
WRITE ACCESS PW2 or (PW1 and RWTBL2)
A2h AND B2h MEMORY Common A2h and B2h memory locations
MEMORY TYPE Nonvolatile (SEE)
8Eh RESERVED RSSI2C
2
RSSI2C
1
RSSI2C
0
RESERVED RSSI2F
2
RSSI2F
1
RSSI2F
0
BIT 7 BIT 0
Allows for right-shifting the final answer of RSSI2 COARSE and RSSI2 FINE. This allows for scaling the measurement to
the smallest full-scale voltage and then right-shifting the final result so the reading is weighted to the correct LSB.
FACTORY DEFAULT 00h
READ ACCESS PW2 or (PW1 and RWTBL2) or (PW1 and RTBL2)
WRITE ACCESS PW2 or (PW1 and RWTBL2)
A2h AND B2h MEMORY Common A2h and B2h memory locations
MEMORY TYPE Nonvolatile (SEE)
8Fh RESERVED RSSI1C
2
RSSI1C
1
RSSI1C
0
RESERVED RSSI1F
2
RSSI1F
1
RSSI1F
0
BIT 7 BIT 0
Allows for right-shifting the final answer of RSSI1 COARSE and RSSI1 FINE. This allows for scaling the measure-
ments to the smallest full-scale voltage and then right-shifting the final result so the reading is weighted to the cor-
rect LSB.
FACTORY DEFAULT 00h
READ ACCESS N/A
WRITE ACCESS N/A
A2h AND B2h MEMORY N/A
MEMORY TYPE N/A
These registers are reserved.