LAN9420 Datasheet, PDF (145/171 Pages) SMSC Corporation – Single-Chip Ethernet Controller with HP Auto-MDIX Support and PCI Interface

Single-Chip Ethernet Controller with HP Auto-MDIX Support and PCI Interface
Datasheet
4.5.9 Special Modes
Index (In Decimal): 18
Size:
16 bits
BITS
15:8
7-5
4-0
DESCRIPTION
RESERVED
MODE
PHY Mode of operation. Refer to Table 4.8 for more details.
PHYADD
PHY Address. The PHY Address is used for the SMI address.
TYPE
RO
R/W
NASR
R/W
NASR
DEFAULT
-
111b
00001b
MODE
000b
001b
010b
011b
100b
101b
110b
111b
Table 4.8 MODE Control
DEFAULT REGISTER BIT VALUES
MODE DEFINITIONS
REGISTER 0
REGISTER 4
10BASE-T Half Duplex. Auto-negotiation disabled.
10BASE-T Full Duplex. Auto-negotiation disabled.
100BASE-TX Half Duplex. Auto-negotiation
disabled. CRS is active during Transmit & Receive.
100BASE-TX Full Duplex. Auto-negotiation
disabled. CRS is active during Receive.
100ase-TX Half Duplex is advertised. Auto-
negotiation enabled. CRS is active during Transmit
& Receive.
Repeater mode. Auto-negotiation enabled.
100BASE-TX Half Duplex is advertised. CRS is
active during Receive.
RESERVED - Do not set LAN9420/LAN9420i in this
mode.
All capable. Auto-negotiation enabled.
[13,12,8]
000
001
100
101
110
110
N/A
X1X
[8,7,6,5]
N/A
N/A
N/A
N/A
0100
0100
N/A
1111
SMSC LAN9420/LAN9420i
145
DATASHEET
Revision 1.6 (07-18-11)