DP83815 datasheet(68/108 Pages) NSC

68 / 108 page

www.national.com

4.0 Register Set (Continued)

4.3.2 Basic Mode Status Register

Collision Test Collision Test: Default: 0

1 = Collision test enabled

0 = Normal operation

When set, this bit will cause the COL signal to be asserted in response to the assertion of TXEN within

512-bit times. The COL signal will be de-asserted within 4-bit times in response to the de-assertion of

TXEN.

6:0

Reserved

Reserved: Default: 0, RO

Tag: BMSR

Size: 16 bits

Hard Reset: 7849h

Offset: 0084h

Access: Read Only

Bit

Bit Name

Description

100BASE-T4

100BASE-T4 Capable: Default: 0

0 = Device not able to perform 100BASE-T4 mode.

100BASE-TX

Full Duplex

100BASE-TX Full Duplex Capable: Default: 1

1 = Device able to perform 100BASE-TX in full duplex mode

100BASE-TX

Half Duplex

100BASE-TX Half Duplex Capable: Default: 1

1 = Device able to perform 100BASE-TX in half duplex mode.

10BASE-T

Full Duplex

10BASE-T Full Duplex Capable: Default: 1

1 = Device able to perform 10BASE-T in full duplex mode

10BASE-T

Half Duplex

10BASE-T Half Duplex Capable: Default: 1

1 = Device able to perform 10BASE-T in half duplex mode

10:7

Reserved

Reserved: Write as 0, read as 0

Preamble

Suppression

Preamble suppression Capable: Default: 1

1 = Device able to perform management transaction with preamble suppressed, 32-bits of preamble

needed only once after reset, invalid opcode or invalid turnaround.

0 = Normal management operation

Auto-

Negotiation

Complete

Auto-Negotiation Complete: Default: 0

1 = Auto-Negotiation process complete

0 = Auto-Negotiation process not complete

Remote Fault Remote Fault: Default: 0/L(H)

1 = Remote Fault condition detected (cleared on read or by reset). Fault criteria: Far End Fault Indication

or notification from Link Partner of Remote Fault.

0 = No remote fault condition detected

Auto-

Negotiation

Ability

Auto Configuration Ability: Default: 1

1 = Device is able to perform Auto-Negotiation

0 = Device is not able to perform Auto-Negotiation

Link Status

Link Status: Default: 0/L(L)

1 = Valid link established (for either 10 or 100 Mb/s operation)

0 = Link not established

The criteria for link validity is implementation specific. The occurrence of a link failure condition will cause

the Link Status bit to clear. Once cleared, this bit may only be set by establishing a good link condition

and a read via the management interface.

Jabber Detect Jabber Detect: Default: 0/LH

1 = Jabber condition detected

0 = No Jabber

This bit is implemented with a latching function, such that the occurrence of a jabber condition causes it

to set until it is cleared by a read to this register by the management interface or by a reset.

This bit only has meaning in 10 Mb/s mode.

Extended

Capability

Extended Capability: Default: 1

1 = Extended register capabilities

0 = Basic register set capabilities only

Bit

Bit Name

Description

DP83815 Datasheet(PDF) 68 Page - National Semiconductor (TI)

DP83815 Datasheet(HTML) 68 Page - National Semiconductor (TI)

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL