DP83867CS datasheet(75/114 Pages) TI1

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DP83867CS, DP83867IS, DP83867E

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SNLS504 – OCTOBER 2015

Table 36. Configuration Register 3 (CFG3), Address 0x001E (continued)

BIT

BIT NAME

DEFAULT

DESCRIPTION

Extended FD Ability

0, RW

Extended Full-Duplex Ability:

1 = Force Full-Duplex while working with link partner in forced

100B-TX. When the PHY is set to Auto-Negotiation or Force 100B-

TX and the link partner is operated in Force 100B-TX, the link is

always Full Duplex

0 = Disable Extended Full Duplex Ability. Decision to work in Full

Duplex or Half Duplex mode follows IEEE specification.

RESERVED

0, RO

RESERVED

Robust Auto-MDIX

0, RW

Robust Auto-MDIX:

1 =Enable Robust Auto MDI/MDIX resolution

0 = Normal Auto MDI/MDIX mode

If link partners are configured to operational modes that are not

supported by normal Auto MDI/MDIX mode (like Auto-Neg versus

Force 100Base-TX or Force 100Base-TX versus Force 100Base-

TX), this Robust Auto MDI/MDIX mode allows MDI/MDIX

resolution and prevents deadlock.

Fast Auto-MDIX

0, RW

Fast Auto MDI/MDIX:

1 = Enable Fast Auto MDI/MDIX mode

0 = Normal Auto MDI/MDIX mode

If both link partners are configured to work in Force 100Base-TX

mode (Auto-Negotiation is disabled), this mode enables Automatic

MDI/MDIX resolution in a short time.

INT_OE

0, RW

Interrupt Output Enable:

1 = INTN/PWDNN Pad is an Interrupt Output.

0 = INTN/PWDNN Pad in a Power Down Input.

FORCE_INTERRUPT

0, RW

Force Interrupt:

1 = Assert interrupt pin.

0 = Normal interrupt mode.

5:3

RESERVED

0, RO

RESERVED: Writes ignored, read as 0.

TDR_FAIL

0, RO

TDR Failure:

1 = TDR failed.

0 = Normal TDR operation.

TDR_DONE

1, RO

TDR Done:

1 = TDR has completed.

0 = TDR has not completed.

TDR_START

0, RW

TDR Start:

1 = Start TDR.

0 = Normal operation

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