Datasheet

Bits Description Type Default
15:10 PHY ID Number
Assigned to the 19th through 24th bits of the OUI.
R/W 110000b
9:4 Model Number
Six-bit manufacturer’s model number.
R/W 001111b
3:0 Revision Number
Four-bit manufacturer’s revision number.
R/W Note 4-2
 2016 Microchip Technology Inc. DS00002165B-page 45
LAN8720A/LAN8720AI
Note 4-2 The default value of this field will vary dependent on the silicon revision number.
4.2.5 AUTO NEGOTIATION ADVERTISEMENT REGISTER
Index (In Decimal): 4 Size: 16 bits
Bits Description Type Default
15:14 RESERVED RO —
13 Remote Fault
0 = no remote fault
1 = remote fault detected
R/W 0b
12 RESERVED RO —
11:10 Pause Operation
00 = No PAUSE
01 = Symmetric PAUSE
10 = Asymmetric PAUSE toward link partner
11 = Advertise support for both Symmetric PAUSE and Asymmetric PAUSE
to
ward 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 set-
tings upon auto-negotiation completion.
R/W 00b
9 RESERVED RO —
8 100BASE-TX Full Duplex
0 = no TX full duplex ability
1 = TX with full duplex
R/W Note 4-3
7 100BASE-TX
0 = no TX ability
1 = TX able
R/W 1b
6 10BASE-T Full Duplex
0 = no 10Mbps with full duplex ability
1 = 10Mbps with full duplex
R/W Note 4-3
5 10BASE-T
0 = no 10Mbps ability
1 = 10Mbps able
R/W Note 4-3