Small Footprint RMII 10/100 Ethernet Transceiver with HP Auto-MDIX Support
Datasheet
4.2.14
PHY Special Control/Status Register
Index (In Decimal): 31
Size:
16 bits
BITS
DESCRIPTION
TYPE
DEFAULT
15:13
12
RESERVED
Autodone
RO
RO
-
0b
Auto-negotiation done indication:
0 = Auto-negotiation is not done or disabled (or not active)
1 = Auto-negotiation is done
11:5
4:2
RESERVED - Write as 0000010b, ignore on read.
R/W
RO
0000010b
XXX
Speed Indication
HCDSPEED value:
001 = 10BASE-T half-duplex
101 = 10BASE-T full-duplex
010 = 100BASE-TX half-duplex
110 = 100BASE-TX full-duplex
1:0
RESERVED
RO
-
Revision 1.4 (08-23-12)
62
SMSC LAN8720A/LAN8720Ai
DATASHEET