LAN8740A Datasheet, PDF (81/136 Pages) Microchip Technology – Small Footprint MII/RMII 10/100 Energy Efficient Ethernet Transceiver with HP Auto-MDIX and flexPWR® Technology

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