LXT971ABC datasheet(79/90 Pages) INTEL

79 / 90 page

LXT971A 3.3V Dual-Speed Fast Ethernet Transceiver

Datasheet

Document #: 249414

Revision #: 002

Rev. Date: August 7, 2002

Table 49. Auto-Negotiation Expansion (Address 6)

Bit

Name

Description

Type 1

Default

6.15:6

Reserved

Ignore on read.

6.5

Base Page

This bit indicates the status of the auto-negotiation

variable base page. It flags synchronization with the

auto-negotiation state diagram, allowing detection of

interrupted links. This bit is only used if Register bit

16.1 (Alternate NP feature) is set.

1 = Base page = true

0 = Base page = false

RO/

6.4

Parallel

Detection Fault

1 = Parallel detection fault has occurred.

0 = Parallel detection fault has not occurred.

RO/

6.3

Link Partner

Next Page Able

1 = Link partner is next page able.

0 = Link partner is not next page able.

6.2

Next Page Able

1 = Local device is next page able.

0 = Local device is not next page able.

6.1

Page Received

1 = Indicates that a new page has been received and

the received code word has been loaded into Register

5 (Base Pages) or Register 8 (Next Pages) as specified

in Clause 28 of IEEE 802.3. This bit is cleared on Read.

If Register bit 16.1 is set, the Page Received bit is also

cleared when mr_page_rx = false or transmit_disable =

true.

6.0

Link Partner A/N

Able

1 = Link partner is auto-negotiation able.

0 = Link partner is not auto-negotiation able.

1. RO = Read Only LH = Latching High

Table 50. Auto-Negotiation Next Page Transmit Register (Address 7)

Bit

Name

Description

Type 1

Default

7.15

(NP)

1 = Additional next pages follow

0 = Last page

R/W

7.14

Reserved

Write as 0, ignore on read

7.13

Message Page

(MP)

1 = Message page

0 = Unformatted page

R/W

7.12

Acknowledge 2

(ACK2)

1 = Complies with message

0 = Cannot comply with message

R/W

7.11

Toggle

(T)

1 = Previous value of the transmitted Link Code

Word equalled logic zero

0 = Previous value of the transmitted Link Code

Word equalled logic one

R/W

7.10:0

Message/Unformatted

Code Field

R/W

00000000

001

1. RO = Read Only. R/W = Read/Write

LXT971ABC датащи(PDF) 79 Page - Intel Corporation

LXT971ABC датащи(HTML) 79 Page - Intel Corporation

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

датащи скачать

ссылки URL