DS1886 datasheet(49/92 Pages) MAXIM

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�� Maxim Integrated Products 49

DS1886

SFP and PON ONU Controller

with Digital LDD Interface

A2h Lower Memory, Register 6Eh: STATUS

POWER-ON VALUE

X0XX 0XXXb

READ ACCESS

All

WRITE ACCESS

See below description

MEMORY TYPE

Volatile

Write Access

N/A

All

N/A

All

N/A

6Eh

TXDS

TXDC

TXFIS

RSELS

RESERVED

TXFOUTS

RXL

RDYB

BIT 7

BIT 0

BIT 7

TXDS: TXD status bit. Reflects the logic state of the TXD pin (read-only).

0 = TXD pin is logic-low.

1 = TXD pin is logic-high.

BIT 6

TXDC: TXD software control bit. This bit allows for software control that is identical to the TXD pin.

See the section on TXD for further information. Its value is wired-ORed with the logic value of the

TXD pin (writable by all users).

0 = (Default)

1 = Forces the device into a TXD state regardless of the value of the TXD pin.

BIT 5

TXFIS: Reflects the status of the TXF pin. The status will also include any inversion caused by the

INVTXFI bit (read-only).

0 = TXF pin is low (after any inversion caused by the INVTXFI bit).

1 = TXF pin is high (after any inversion caused by the INVTXFI bit).

BIT 4

RSELS: RSEL status bit. Reflects the logic state of the RSEL pin (read-only).

0 = RSEL pin is logic-low.

1 = RSEL pin is logic-high.

BIT 3

RESERVED

BIT 2

TXFOUTS: TXFOUT status. Indicates the state the open drain output is attempting to achieve.

0 = TXFOUT is pulling low.

1 = TXFOUT is high impedance.

BIT 1

RXL: Reflects the driven state of the LOS pin (read-only).

0 = LOS pin is driven low.

1 = LOS pin is pulled high.

BIT 0

RDYB: Ready bar.

0 = VCC is above POA.

1 = VCC is below POA and/or too low to communicate over the I2C bus.

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