
RTL8100B(L) 
2001-11-9 
Rev.1.41 
27 
5.20 Auto-Negotiation Advertisement Register  
(Offset 0066h-0067h, R/W) 
This register contains the advertised abilities of this device as they will be transmitted to its link partner during Auto-negotiation. 
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 = acknowledge reception of link partner capability data word. 
1 = advertise remote fault detection capability; 
0 = do not advertise remote fault detection capability. 
Reserved 
1 = flow control is supported by local node.  
0 = flow control is not supported by local mode. 
14 
13 
ACK 
RF 
0, RO  
0, RW 
12-11 
10 
- 
- 
Pause 
The default value 
comes from 
EEPROM, RO 
0, RO  
9 
T4 
1 = 100Base-T4 is supported by local node; 
0 = 100Base-T4 not supported by local node. 
1 = 100Base-TX full duplex is supported by local node;  
0 = 100Base-TX full duplex not supported by local node. 
1 = 100Base-TX is supported by local node; 
0 = 100Base-TX not supported by local node. 
1 = 10Base-T full duplex supported by local node; 
0 = 10Base-T full duplex not supported by local node. 
1 = 10Base-T is supported by local node; 
0 = 10Base-T not supported by local node. 
Binary encoded selector supported by this node. Currently only 
CSMA/CD <00001> is specified. No other protocols are supported. 
8 
TXFD 
1, RW 
7 
TX 
1, RW 
6 
10FD 
1, RW 
5 
10 
1, RW 
4-0 
Selector 
<00001>, RW