lan9221 Standard Microsystems Corp., lan9221 Datasheet - Page 119

• Manufacturer Part Number: lan9221
• Description: High-performance 16-bit Non-pci 10/100 Ethernet Controller With Variable Voltage I/o
• Manufacturer: Standard Microsystems Corp.

High-Performance 16-bit Non-PCI 10/100 Ethernet Controller with Variable Voltage I/O
Datasheet
SMSC LAN9221/LAN9221i
5.5.1
BITS
6-0
15
14
13
12
11
10
9
8
7
Reset. 1 = software reset. Bit is self-clearing. For best results, when setting
this bit do not set other bits in this register.
Loopback. 1 = loopback mode, 0 = normal operation
Speed Select. 1 = 100Mbps, 0 = 10Mbps. Ignored if Auto Negotiation is
enabled (0.12 = 1).
Auto-Negotiation Enable. 1 = enable auto-negotiate process (overrides
0.13 and 0.8) 0 = disable auto-negotiate process.
Power Down. 1 = General power down-mode, 0 = normal operation.
Note:
Reserved
Restart Auto-Negotiate. 1 = restart auto-negotiate process 0 = normal
operation. Bit is self-clearing.
Duplex Mode. 1 = full duplex, 0 = half duplex. Ignored if Auto Negotiation
is enabled (0.12 = 1).
Collision Test. 1 = enable COL test, 0 = disable COL test
Reserved
Basic Control Register
Note 5.1
Index (In Decimal):
After this bit is cleared, the PHY may auto-negotiate with it's
partner station. This process may take a few seconds to complete.
Once auto-negotiation is complete, bit 5 of the PHY's Basic Status
Register will be set.
The default value of this bit is determined by the auto-negotiation process.
DESCRIPTION
0
DATASHEET
119
Size:
16-bits
RW/SC
RW/SC
TYPE
RW
RW
RW
RW
RW
RW
RO
RO
Revision 2.6 (12-04-08)
See
See
DEFAULT
Note 5.1
Note 5.1
0
0
1
0
0
0
0
0