Register 17: Ethernet PHY Management Register 0 – Control (MR0), address
0x00
This register enables software to configure the operation of the PHY layer. The default settings of
these registers are designed to initialize the Ethernet Controller to a normal operational mode without
configuration.
Ethernet PHY Management Register 0 – Control (MR0)
Base 0x4004.8000
Address 0x00
Type R/W, reset 0x1000
0123456789101112131415
reservedCOLTDUPLEXRANEGISOPWRDNANEGENSPEEDSLLOOPBKRESET
R/WR/WR/WR/WR/WR/WR/WR/WR/WR/WR/WR/WR/WR/WR/WR/WType
0000000000001000Reset
DescriptionResetTypeNameBit/Field
Reset Registers
DescriptionValue
The PHY layer registers reset to their default state and the
internal state machines are reinitialized.
1
No effect.0
Once the reset operation has completed, this bit is automatically cleared
by hardware.
0R/WRESET15
Loopback Mode
DescriptionValue
Enables the Loopback mode of operation. The receiver ignores
external inputs and receives the data that is transmitted by the
transmitter.
1
No effect.0
0R/WLOOPBK14
Speed Select
DescriptionValue
Enables the 100 Mbps mode of operation (100BASE-TX).1
Enables the 10 Mbps mode of operation (10BASE-T).0
0R/WSPEEDSL13
Auto-Negotiation Enable
DescriptionValue
Enables the auto-negotiation process.1
No effect.0
1R/WANEGEN12
July 24, 2012796
Texas Instruments-Production Data
Ethernet Controller
OBSOLETE: TI has discontinued production of this device.