5228-DS06-R datasheet(59/100 Pages) BOARDCOM

59 / 100 page

Data Sheet

BCM5228

7/12/04

Broa d c om Co rp o r a t i o n

Document

5228-DS09-405-R

Auto-Negotiation Link Partner (LP) Next Page Transmit Register

Page 47

AUTO-NEGOTIATION LINK PARTNER (LP) NEXT PAGE TRANSMIT

Next Page. Indicates whether this is the last Next Page.

Message Page. Differentiates a Message Page from an unformatted page.

Acknowledge 2. Indicates that link partner has the ability to comply with the message.

Toggle. Used by the arbitration function to ensure synchronization with the link partner during Next Page exchange.

Message Code Field. An 11-bit wide field, encoding 2048 possible messages.

Unformatted Code Field. An 11-bit wide field, which can contain an arbitrary value.

Table 26: Next Page Transmit Register (Address 08d, 08h)

Bit

Name

R/W

Description

Default

1 = Additional next page(s) follows

0 = Last page

Reserveda

a. Preserve existing values of reserved bits by completing a “Read/Modify Write.”

–

–0

Message Page

1= Message page

0 = Unformatted page

Acknowledge 2

1 = Complies with message

0 = Cannot comply with message

Toggle

1 = Previous value of the transmitted link code word

equalled logic zero

0 = Previous value of the transmitted link code word

equalled logic one

10:0

Message/Unformatted Code Field

Note: R/W = Read/Write, RO = Read Only, SC = Self Clear, LL = Latched Low, LH = Latched High, LL and LH Clear

after read operation.

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