5238-DS03-405-R datasheet(42/76 Pages) BOARDCOM

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BCM5238

Advance Data Sheet

1/31/03

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

Page 34

Auto-Negotiation Advertisement Register

Document

5238-DS03-405-R

AUTO-NEGOTIATION EXPANSION REGISTER

Parallel Detection Fault. Bit 4 of the Auto-Negotiation Expansion Register is a read-only bit that gets latched high when a

parallel detection fault occurs in the Auto-Negotiation state machine. For further details, consult the IEEE standard. The bit

is reset to 0 after the register is read, or when the chip is reset.

Link Partner Next Page Able. Bit 3 of the Auto-Negotiation Expansion Register returns a 1 when the link partner has Next

Page capabilities. It has the same value as bit 15 of the Link Partner Ability Register.

Next Page Able. The BCM5248 Returns 1 when bit 2 of the Auto-Negotiation Expansion Register is read indicating that it

has Next Page capabilities.

Page Received. Bit 1 of the Auto-Negotiation Expansion Register is latched high when a new link code word is received

from the link partner, checked, and acknowledged. It remains high until the register is read, or until the chip is reset.

Link Partner Auto-Negotiation Able. Bit 0 of the Auto-Negotiation Expansion Register returns a 1 when the link partner is

known to have auto-negotiation capability. Before any auto-negotiation information is exchanged, or if the link partner does

not comply with IEEE auto-negotiation, the bit returns a value of 0.

Table 23: Auto-Negotiation Expansion Register (Address 06d, 06h

Bit

Name

R/W

Description

Default

15:5

Reserveda

a. When writing to this register, preserve existing values of reserved bits by completing a Read/Modify Write.

–

000h

Parallel Detection Fault

1 = Parallel detection fault.

0 = No parallel detection fault

Link Partner Next Page Able

1 = Link partner has Next Page capability

0 = Link partner does not have Next Page capability

Next Page Able

1 = Next Page able

Page Received

1 = New page has been received

0 = New page has not been received

Link Partner Auto-Negotiation

Able

1 = Link partner has auto-negotiation capability

0 = Link partner does not have auto-negotiation

capability

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

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

5238-DS03-405-R Datasheet(PDF) 42 Page - Broadcom Corporation.

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