LM3S8971 Datasheet, PDF (452/577 Pages) List of Unclassifed Manufacturers – Microcontroller

Ethernet Controller
Register 25: 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
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
reserved
ANEGF DPLX RATE RXSD RX_LOCK
reserved
Type RO
RO
RO
RC
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
Reset
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Bit/Field
15:13
12
11
10
9
8
7:0
Name
reserved
ANEGF
DPLX
RATE
RXSD
RX_LOCK
reserved
Type
RO
RC
RO
RO
RO
RO
RO
Reset
0
0
0
0
0
0
00
Description
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.
Auto-Negotiation Failure
When set, indicates that no common technology was found during
Auto-Negotiation and has failed. This bit remains set until read.
Duplex Mode
When set, indicates that Full-Duplex was the highest common
denominator found during the Auto-Negotiation process. Otherwise,
Half-Duplex was the highest common denominator found.
Rate
When set, indicates that 100Base-TX was the highest common
denominator found during the Auto-Negotiation process. Otherwise,
10Base-TX was the highest common denominator found.
Receive Detection
When set, indicates that receive signal detection has occurred (in
100Base-TX mode) or that Manchester-encoded data has been detected
(in 10Base-T mode).
Receive PLL Lock
When set, indicates that the Receive PLL has locked onto the receive
signal for the selected speed of operation (10Base-T or 100Base-TX).
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.
452
October 01, 2007
Preliminary