DP83865DVH datasheet(23/86 Pages) NSC

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2.0 Register Block (Continued)

10BASE-T

Full Duplex

1, P

10BASE-T Full Duplex Capable:

1 = Device able to perform 10BASE-T in Full Duplex mode.

10BASE-T

Half Duplex

1, P

10BASE-T Half Duplex Capable:

1 = Device able to perform 10BASE-T in Half Duplex mode.

100BASE-T2

Full Duplex

0, P

100BASE-T2 Full Duplex Capable:

0 = Device unable to perform 100BASE-T2 Full Duplex mode.

DP83865 does not support 100BASE-T2 mode and bit should al-

ways be read back as “0”.

100BASE-T2

Half Duplex

0, P

100BASE-T2 Half Duplex Capable:

0 = Device unable to perform 100BASE-T2 Half Duplex mode.

DP83865 does not support 100BASE-T2 mode and bit should al-

ways be read back as “0”.

1000BASE-T

Extended Status

1, P

1000BASE-T Extended Status Register:

1 = Device supports Extended Status Register 0x0F.

Reserved

0, RO

Reserved by IEEE: Write ignored, read as 0.

Preamble

Suppression

1, P

Preamble suppression Capable:

1 = Device able to perform management transaction with pream-

ble suppressed, 32-bits of preamble needed only once after re-

set, invalid opcode or invalid turnaround.

Auto-Negotiation

Complete

0, RO

Auto-Negotiation Complete:

1 = Auto-Negotiation process complete, and contents of registers

5, 6, 7, & 8 are valid.

0 = Auto-Negotiation process not complete.

Remote Fault

0, RO, LH

Remote Fault:

1 = Remote Fault condition detected (cleared on read or by re-

set). Fault criteria: Far End Fault Indication or notification from

Link Partner of Remote Fault.

0 = No remote fault condition detected.

Auto-Negotiation

Ability

1, P

Auto Configuration Ability:

1 = Device is able to perform Auto-Negotiation.

Link Status

0, RO, LL

Link Lost Since Last Read Status:

1 = Link was good since last read of this register. (10/100/1000

Mbps operation).

0 = Link was lost since last read of this register.

The occurrence of a link failure condition will causes the Link Sta-

tus bit to clear. Once cleared, this bit may only be set by estab-

lishing a good link condition and a read via the management

interface.

This bit doesn’t indicate the link status, but rather if the link was

lost since last read. For actual link status, either this register

should be read twice, or register 0x11 bit 2 should be read.

Jabber Detect

0, RO, LH

Jabber Detect: Set to 1 if 10BASE-T Jabber detected locally.

1 = Jabber condition detected.

0 = No Jabber.

Extended Capability

1, P

Extended Capability:

1 = Extended register capable.

Table 4. Basic Mode Status Register (BMSR) address 0x01

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