LM3S6952 Datasheet, PDF (477/626 Pages) Texas Instruments – Stellaris LM3S6952 Microcontroller

Stellaris® LM3S6952 Microcontroller
Register 25: 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
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
Type
R/W
Reset
0x1
Description
Transmit Amplitude Selection
The TXO 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
0x000 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.
April 05, 2010
477
Texas Instruments-Production Data