LAN9221 Datasheet, PDF (127/151 Pages) SMSC Corporation – High-Performance 16-bit Non-PCI 10/100 Ethernet Controller with Variable Voltage I/O

High-Performance 16-bit Non-PCI 10/100 Ethernet Controller with Variable Voltage I/O
Datasheet
5.5.13 PHY Special Control/Status
Index (In Decimal):
31
Size:
16-bits
BITS
DESCRIPTION
15 - 13 Reserved
12 Autodone. Auto-negotiation done indication:
0 = Auto-negotiation is not done or disabled (or not active)
1 = Auto-negotiation is done
11-5 Reserved. Write as 0000010b, ignore on Read.
4-2 Speed Indication. HCDSPEED value:
[001]=10Mbps half-duplex
[101]=10Mbps full-duplex
[010]=100Base-TX half-duplex
[110]=100Base-TX full-duplex
1-0 Reserved. Write as 0; ignore on Read
TYPE
RO
RO
DEFAULT
000b
0b
RW
0000010b
RO See Note 5.6
RO
00b
Note 5.6 The default value of this bit is determined by the auto-negotiation process.
SMSC LAN9221/LAN9221i
127
DATASHEET
Revision 2.6 (12-04-08)