Register 24: Ethernet PHY Management Register 18 – Diagnostic (MR18),
address 0x12
This register enables software to diagnose the results of the previous auto-negotiation.
Ethernet PHY Management Register 18 – Diagnostic (MR18)
Base 0x4004.8000
Address 0x12
Type RO, reset 0x0000
0123456789101112131415
reservedRX_LOCKRXSDRATEDPLXANEGFreserved
RORORORORORORORORORORORORCROROROType
0000000000000000Reset
DescriptionResetTypeNameBit/Field
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.
0x0ROreserved15:13
Auto-Negotiation Failure
When set, this bit indicates that no common technology was found during
auto-negotiation and auto-negotiation has failed. This bit remains set
until read.
0RCANEGF12
Duplex Mode
When set, this bit indicates that Full-Duplex was the highest common
denominator found during the auto-negotiation process. Otherwise,
Half-Duplex was the highest common denominator found.
0RODPLX11
Rate
When set, this bit indicates that 100BASE-TX was the highest common
denominator found during the auto-negotiation process. Otherwise,
10BASE-T was the highest common denominator found.
0RORATE10
Receive Detection
When set, this bit indicates that receive signal detection has occurred
(in 100BASE-TX mode) or that Manchester-encoded data has been
detected (in 10BASE-T mode).
0RORXSD9
Receive PLL Lock
When set, this bit indicates that the Receive PLL has locked onto the
receive signal for the selected speed of operation (10BASE-T or
100BASE-TX).
0RORX_LOCK8
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.
0x00ROreserved7:0
455June 22, 2010
Texas Instruments-Production Data
Stellaris® LM3S8530 Microcontroller