Datasheet

 2013-2015 Microchip Technology Inc. DS00001987A-page 81
LAN8740A/LAN8740Ai
4.2.22 PHY SPECIAL CONTROL/STATUS REGISTER
Index (In Decimal): 31 Size: 16 bits
Bits Description Type Default
15:13 RESERVED RO -
12 Autodone
Auto-negotiation done indication:
0 = Auto-negotiation is not done or disabled (or not active).
1 = Auto-negotiation is done.
RO 0b
11:7 RESERVED RO -
6 Enable 4B5B
0 = Bypass encoder/decoder
1 = Enable 4B5B encoding/decoding. MAC interface must be configured in MII
mode.
R/W 1b
5 RESERVED RO -
4:2 Speed Indication
HCDSPEED value:
001 = 10BASE-T half-duplex
101 = 10BASE-T full-duplex
010 = 100BASE-TX half-duplex
110 = 100BASE-TX full-duplex
RO XXXb
1:0 RESERVED RO -