LXT972 Level One, LXT972 Datasheet - Page 58

• Manufacturer Part Number: LXT972
• Description: 3.3V Dual-Speed Fast Ethernet Transceiver Datasheet
• Manufacturer: Level One

LXT972 3.3V Dual-Speed Fast Ethernet Transceiver
Table 46: Configuration Register (Address 16, Hex 10)
58
16.15
16.14
16.13
16.12
16.11
16.10
16.9
16.8
16.7
16.6
16.5
16.4:3 Reserved
16.2
16.1
16.0
1. R/W = Read /Write, LHR = Latches High on Reset
Bit
Reserved
Force Link Pass
Transmit Disable
Bypass Scrambler
(100BASE-TX)
Reserved
Jabber
(10BASE-T)
SQE
(10BASE-T)
TP Loopback
(10BASE-T)
CRS Select
(10BASE-T)
Reserved
PRE_EN
Reserved
Alternate NP
feature
Reserved
Name
Write as zero, ignore on read.
1 = Force Link pass
0 = Normal operation
1 = Disable Twisted Pair transmitter
0 = Normal Operation
1 = Bypass Scrambler and Descrambler
0 = Normal Operation
Ignore
1 = Disable Jabber Correction
0 = Normal operation
1 = Enable Heart Beat
0 = Disable Heart Beat
1 = Disable TP loopback during half-duplex operation
0 = Normal Operation
1 = CRS deassert extends to RX_DV deassert
0 = Normal Operation
Write as zero, ignore on read.
Preamble Enable.
0 = Set RX_DV high coincident with SFD.
1 = Set RX_DV high and RXD = preamble when CRS is asserted.
Write as zero, ignore on read.
Write as zero, ignore on read.
1 = Enable alternate auto negotiate next page feature.
0 = Disable alternate auto negotiate next page feature
Write as zero, ignore on read.
Description
Type
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
1
Default
00
0
0
0
0
0
0
0
0
1
0
0
0
0
0