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Small Footprint RMII 10/100 Ethernet Transceiver with HP Auto-MDIX Support
Datasheet
SMSC LAN8720/LAN8720i 43 Revision 1.0 (05-28-09)
DATASHEET
4.9 100Base-T4 1 = T4 able,
0 = no T4 ability
This Phy does not support 100Base-T4.
RO 0
4.8 100Base-TX Full
Duplex
1 = TX with full duplex,
0 = no TX full duplex ability
RW Set by
MODE[2:0]
bus
4.7 100Base-TX 1 = TX able,
0 = no TX ability
RW 1
4.6 10Base-T Full
Duplex
1 = 10Mbps with full duplex
0 = no 10Mbps with full duplex ability
RW Set by
MODE[2:0]
bus
4.5 10Base-T 1 = 10Mbps able,
0 = no 10Mbps ability
RW Set by
MODE[2:0]
bus
4.4:0 Selector Field [00001] = IEEE 802.3 RW 00001
Table 5.26 Register 5 - Auto Negotiation Link Partner Ability
ADDRESS NAME DESCRIPTION MODE DEFAULT
5.15 Next Page 1 = “Next Page” capable,
0 = no “Next Page” ability
This Phy does not support next page ability.
RO 0
5.14 Acknowledge 1 = link code word received from partner
0 = link code word not yet received
RO 0
5.13 Remote Fault 1 = remote fault detected,
0 = no remote fault
RO 0
5.12:11 Reserved RO 0
5.10 Pause Operation 1 = Pause Operation is supported by remote MAC,
0 = Pause Operation is not supported by remote MAC
RO 0
5.9 100Base-T4 1 = T4 able,
0 = no T4 ability.
This Phy does not support T4 ability.
RO 0
5.8 100Base-TX Full
Duplex
1 = TX with full duplex,
0 = no TX full duplex ability
RO 0
5.7 100Base-TX 1 = TX able,
0 = no TX ability
RO 0
5.6 10Base-T Full
Duplex
1 = 10Mbps with full duplex
0 = no 10Mbps with full duplex ability
RO 0
5.5 10Base-T 1 = 10Mbps able,
0 = no 10Mbps ability
RO 0
5.4:0 Selector Field [00001] = IEEE 802.3 RO 00001
Table 5.25 Register 4 - Auto Negotiation Advertisement (continued)
ADDRESS NAME DESCRIPTION MODE DEFAULT