LM3S9792 Datasheet, PDF (854/1279 Pages) Texas Instruments – Stellaris® LM3S9792 Microcontroller

Ethernet Controller
Bit/Field
11
10
9
8
7
6:0
Name
PWRDN
ISO
RANEG
DUPLEX
COLT
reserved
Type
R/W
R/W
R/W
R/W
R/W
R/W
Reset
0
Description
Power Down
Value Description
1 The PHY layer is configured to be in a low-power consuming
state. All data on the data inputs is ignored.
0 No effect.
0
Isolate
Value Description
1 The transmit and receive data paths are isolated and all data
being transmitted and received is ignored.
0 No effect.
0
Restart Auto-Negotiation
Value Description
1 Restarts the auto-negotiation process.
0 No effect.
Once the restart has initiated, this bit is automatically cleared by
hardware.
0
Set Duplex Mode
Value Description
1 Enables the Full-Duplex mode of operation. This bit can be set
by software in a manual configuration process or by the
auto-negotiation process.
0 Enables the Half-Duplex mode of operation.
Note that in 10BASE-T half-duplex mode, the transmitted data
is looped back on the receive path.
0
0x00
Collision Test
Value Description
1 Enables the Collision Test mode of operation.
0 No effect.
The COLT bit is set after the initiation of a transmission and is cleared
once the transmission is halted.
Software should not rely on the value of a reserved bit. To provide
compatibility with future products, the value of a reserved bit should be
preserved across a read-modify-write operation.
These bits should always be written as zero.
854
June 14, 2010
Texas Instruments-Advance Information