LM3S8938 Datasheet, PDF (479/550 Pages) List of Unclassifed Manufacturers – Microcontroller

LM3S8938 Microcontroller
Register 27: Ethernet PHY Management Register 19 – Transceiver Control
(MR19), offset 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
Offset 0x13
Type R/W, reset 0x4000
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
reserved
Type RO
RO
RO
RO
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
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
31:16
15:14
Name
reserved
TXO[1:0]
Type
RO
R/W
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.
Transmit Amplitude Selection
The TXO field sets the transmit output amplitude to account for transmit
transformer insertion loss.
Value Meaning
00 Gain set for 0.0dB of insertion loss
01 Gain set for 0.4dB of insertion loss
10 Gain set for 0.8dB of insertion loss
11 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.
June 14, 2007
479
Luminary Micro Confidential-Advance Product Information