LM3S8971 Datasheet, PDF (453/577 Pages) List of Unclassifed Manufacturers – Microcontroller

LM3S8971 Microcontroller
Register 26: Ethernet PHY Management Register 19 – Transceiver Control
(MR19), address 0x13
This register enables software to set the gain of the transmit output to compensate for transformer
loss.
Ethernet PHY Management Register 19 – Transceiver Control (MR19)
Base 0x4004.8000
Address 0x13
Type R/W, reset 0x4000
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
TXO[1:0]
reserved
Type R/W
R/W
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
Reset
0
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Bit/Field
15:14
Name
TXO[1:0]
Type
R/W
Reset
1
Description
Transmit Amplitude Selection
The TXO[1:0] field sets the transmit output amplitude to account for
transmit transformer insertion loss.
Value Description
0x0 Gain set for 0.0dB of insertion loss
0x1 Gain set for 0.4dB of insertion loss
0x2 Gain set for 0.8dB of insertion loss
0x3 Gain set for 1.2dB of insertion loss
13:0
reserved
RO
0x0
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.
October 01, 2007
453
Preliminary