DS1877 datasheet(49/65 Pages) MAXIM

49 / 65 page

Maxim Integrated

SFP Controller for Dual Rx Interface

DS1877

Table 02h, Register 8Eh: RIGHT-SHIFT2 (RSHIFT2)

Table 02h, Register 8Fh: RIGHT-SHIFT1 (RSHIFT1)

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

RSSI2C2

RSSI2C1

RSSI2C0

RESERVED

RSSI2F2

RSSI2F1

RSSI2F0

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

RSSI1C2

RSSI1C1

RSSI1C0

RESERVED

RSSI1F2

RSSI1F1

RSSI1F0

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.

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