RTL8100B(L)
2001-11-9
Rev.1.41
28
5.21 Auto-Negotiation Link Partner Ability Register
(Offset 0068h-0069h, R)
This register contains the advertised abilities of the Link Partner as received during Auto-negotiation. The content changes after
the successful Auto-negotiation if Next-pages are supported.
Bit
15
Name
NP
Description/Usage
Default/Attribute
0, RO
Next Page bit.
1 = transmitting the protocol specific data page;
0 = transmitting the primary capability data page
1 = link partner acknowledges reception of local node’s capability
data word.
1 = link partner is indicating a remote fault.
Reserved
1 = Flow control is supported by link partner ,
0 = Flow control is not supported by link partner.
1 = 100Base-T4 is supported by link partner;
0 = 100Base-T4 not supported by link partner.
1 = 100Base-TX full duplex is supported by link partner;
0 = 100Base-TX full duplex not supported by link partner.
1 = 100Base-TX is supported by link partner;
0 = 100Base-TX not supported by link partner.
1 = 10Base-T full duplex is supported by link partner;
0 = 10Base-T full duplex not supported by link partner.
1 = 10Base-T is supported by link partner;
0 = 10Base-T not supported by link partner.
Link Partner's binary encoded node selector. Currently only
CSMA/CD <00001> is specified.
14
ACK
0, RO
13
RF
-
Pause
0, RO
-
0, RO
12-11
10
9
T4
0, RO
8
TXFD
0, RO
7
TX
0, RO
6
10FD
0, RO
5
10
0, RO
4-0
Selector
<00000>, RO
5.22 Auto-Negotiation Expansion Register
(Offset 006Ah-006Bh, R)
This register contains additional status for NWay auto-negotiation.
Bit
15-5
4
Name
-
MLF
Description/Usage
Default/Attribute
-
0, RO
Reserved. These bits are always set to 0.
Status indicating if a multiple link fault has occurred.
1 = fault occurred; 0 = no fault occurred.
Status indicating if the link partner supports Next Page negotiation.
1 = supported; 0 = not supported.
This bit indicates if the local node is able to send additional Next
Pages.
This bit is set when a new Link Code Word Page has been received.
The bit is automatically cleared when the auto-negotiation link
partner’s ability register (register 5) is read by management.
1 = link partner supports NWay auto-negotiation.
3
LP_NP_ABLE
0, RO
2
NP_ABLE
0, RO
1
PAGE_RX
0, RO
0
LP_NW_ABLE
0, RO