![](http://datasheet.mmic.net.cn/330000/RTL8139C_datasheet_16451889/RTL8139C_27.png)
RTL8139C(L)
2002/01/10
Rev.1.4
27
6.20 Auto-negotiation Advertisement Register
(Offset 0066h-0067h, R/W)
Bit
Name
15
NP
1 = transmitting the protocol specific data page;
0 = transmitting the primary capability data page
14
ACK
1 = acknowledge reception of link partner capability data word.
13
1 = advertise remote fault detection capability;
0 = do not advertise remote fault detection capability.
12-11
-
Reserved
10
Pause
1 = flow control is supported by local node.
0 = flow control is not supported by local mode.
Description/Usage
Default/ Attribute
0, RO
Next Page bit.
0, RO
0, RW
-
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
6.21 Auto-Negotiation Link Partner Ability Register
(Offset 0068h-0069h, R)
Bit
Name
15
NP
Next Page bit.
1 = transmitting the protocol specific data page;
0 = transmitting the primary capability data page
14
ACK
1 = link partner acknowledges reception of local node’s capability
data word.
13
RF
1 = link partner is indicating a remote fault.
12-11
-
Reserved
10
Pause
1 = Flow control is supported by link partner,
0 = Flow control is not supported by link partner.
9
T4
1 = 100Base-T4 is supported by link partner;
0 = 100Base-T4 not supported by link partner.
8
TXFD
1 = 100Base-TX full duplex is supported by link partner;
0 = 100Base-TX full duplex not supported by link partner.
7
TX
1 = 100Base-TX is supported by link partner;
0 = 100Base-TX not supported by link partner.
6
10FD
1 = 10Base-T full duplex is supported by link partner;
0 = 10Base-T full duplex not supported by link partner.
5
10
1 = 10Base-T is supported by link partner;
0 = 10Base-T not supported by link partner.
4-0
Selector
Link Partner's binary encoded node selector. Currently only
CSMA/ CD <00001> is specified.
Description/Usage
Default/ Attribute
0, RO
0, RO
0, RO
-
0, RO
0, RO
0, RO
0, RO
0, RO
0, RO
<00000>, RO