5222-DS02-R datasheet(37/76 Pages) BOARDCOM

37 / 76 page

Preliminary Data Sheet

BCM5222

7/20/04

Broadcom Corporation

Document 5222-DS02-405-R

Auto-Negotiation Expansion Register

Page 25

LP Advertise Bits

Bits 9:5 of the Link Partner Ability register reflect the abilities of the link partner. A 1 on any of these bits indicates that the

link partner is capable of performing the corresponding mode of operation. Bits 9:5 are cleared any time auto-negotiation is

restarted or the BCM5222 is reset.

LP Selector Field

Bits 4:0 of the Link Partner Ability register reflect the value of the link partner’s selector field. These bits are cleared any time

auto-negotiation is restarted or the chip is reset.

AUTO-NEGOTIATION EXPANSION REGISTER

Table 14 shows the Auto-Negotiation Expansion register bit descriptions.

RESERVED BITS

Ignore when read.

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, refer to 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.

Table 12: Auto-Negotiation Expansion Register (Address 00110b, 6d, 06h)

Bit

Name

R/W

Description

Default

15:5

Reserved

Ignore when read

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

Next Page Able

1 = BCM5222 does have next page capability

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

Note: R/W = Read/Write, RO = Read only, SC = Self Clear, LL = latched low, LH = latched high (LL and LH are cleared

after read operation)

5222-DS02-R 数据表(PDF) 37 Page - Broadcom Corporation.

5222-DS02-R 数据表(HTML) 37 Page - Broadcom 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

数据表下载