5220-DS02-R datasheet(47/90 Pages) BOARDCOM

47 / 90 page

Preliminary Data Sheet

BCM5220

04/20/04

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

Document

5220-DS04-405-R

MII Status Register

Page 35

AUTO-NEGOTIATION NEXT PAGE REGISTER

Indicates whether this is the last next page to be transmitted.

Message Page

Differentiates a Message Page from an Unformatted Page.

Acknowledge 2

Indicates that a device 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 may contain an arbitrary value.

Table 15: Next Page Transmit Register (Address 07d, 07h)

Bit

Name

R/W

Description

Default

R/W

1 = Additional next page(s) will follow

0 = Last page

Reserveda

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

R/W

Ignore when read

Message Page

R/W

1= Message page

0 = Unformatted page

Acknowledge 2

R/W

1 = Will comply 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

R/W

Notes: R/W = Read/Write, RO = Read only, SC = Self Clear, LL = Latched Low, LH = Latched High, LL & LH Clear after

read operation. Use default values of reserved bit(s) when writing to reserved bit(s).

5220-DS02-R 数据表(PDF) 47 Page - Broadcom Corporation.

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