Small Footprint RMII 10/100 Ethernet Transceiver with HP Auto-MDIX Support
Datasheet
4.2.5
Auto Negotiation Advertisement Register
Index (In Decimal):
4
Size:
16 bits
BITS
DESCRIPTION
TYPE
DEFAULT
15:14
13
RESERVED
RO
-
Remote Fault
0 = no remote fault
1 = remote fault detected
R/W
0b
12
RESERVED
RO
-
11:10
Pause Operation
00 = No PAUSE
R/W
00b
01 = Symmetric PAUSE
10 = Asymmetric PAUSE toward link partner
11 = Advertise support for both Symmetric PAUSE and Asymmetric PAUSE
toward local device
Note:
When both Symmetric PAUSE and Asymmetric PAUSE are set, the
device will only be configured to, at most, one of the two settings
upon auto-negotiation completion.
9
8
RESERVED
RO
-
100BASE-TX Full Duplex
0 = no TX full duplex ability
1 = TX with full duplex
R/W
Note 4.3
7
6
100BASE-TX
0 = no TX ability
1 = TX able
R/W
R/W
R/W
R/W
1b
10BASE-T Full Duplex
0 = no 10Mbps with full duplex ability
1 = 10Mbps with full duplex
Note 4.3
Note 4.3
00001b
5
10BASE-T
0 = no 10Mbps ability
1 = 10Mbps able
4:0
Selector Field
00001 = IEEE 802.3
Note 4.3 The default value of this bit is determined by the MODE[2:0] configuration straps. Refer to
Section 3.7.2, "MODE[2:0]: Mode Configuration," on page 31 for additional information.
SMSC LAN8720A/LAN8720Ai
53
Revision 1.4 (08-23-12)
DATASHEET
SMSC [ SMSC CORPORATION ]
