LM3S9B81 Datasheet, PDF (845/1155 Pages) Texas Instruments – Stellaris® LM3S9B81 Microcontroller

Stellaris® LM3S9B81 Microcontroller
Register 18: Ethernet PHY Management Register 1 – Status (MR1), address
0x01
This register enables software to determine the capabilities of the PHY layer and perform its
initialization and operation appropriately.
Ethernet PHY Management Register 1 – Status (MR1)
Base 0x4004.8000
Address 0x01
Type RO, reset 0x7809
15
14
13
12
11
10
9
8
7
reserved 100X_F 100X_H 10T_F 10T_H
reserved
Type RO
RO
RO
RO
RO
RO
RO
RO
RO
Reset
0
1
1
1
1
0
0
0
0
6
5
4
3
2
ANEGC RFAULT ANEGA LINK
RO
RO
RC
RO
RO
0
0
0
1
0
1
0
JAB
EXTD
RC
RO
0
1
Bit/Field
15
14
Name
reserved
100X_F
Type
RO
RO
Reset
0
1
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.
100BASE-TX Full-Duplex Mode
Value Description
1 The Ethernet Controller is capable of supporting 100BASE-TX
Full-Duplex mode.
0 The Ethernet Controller is not capable of supporting
100BASE-TX Full-Duplex mode.
13
100X_H
RO
1
100BASE-TX Half-Duplex Mode
Value Description
1 The Ethernet Controller is capable of supporting 100BASE-TX
Half-Duplex mode.
0 The Ethernet Controller is not capable of supporting
100BASE-TX Half-Duplex mode.
12
10T_F
RO
1
10BASE-T Full-Duplex Mode
Value Description
1 The Ethernet Controller is capable of supporting 10BASE-T
Full-Duplex mode.
0 The Ethernet Controller is not capable of supporting 10BASE-T
Full-Duplex mode.
11
10T_H
RO
1
10BASE-T Half-Duplex Mode
Value Description
1 The Ethernet Controller is capable of supporting 10BASE-T
Half-Duplex mode.
0 The Ethernet Controller is not capable of supporting 10BASE-T
Half-Duplex mode.
June 29, 2010
845
Texas Instruments-Advance Information