88e3015 Marvell Semiconductor, Inc., 88e3015 Datasheet - Page 71

• Manufacturer Part Number: 88e3015
• Description: Integrated 10/100 Fast Ethernet Transceiver
• Manufacturer: Marvell Semiconductor, Inc.

Table 42:
Copyright © 2006 Marvell
October 26, 2006, Advance
B i ts
7
6
5:4
3
2
1
0
F i e l d
ExtdDistance
SIGDET Polar-
ity
AutoMDI[X]
Reserved
SQE Test
AutoPol
DisJabber
Register 16
PHY Specific Control Register (Continued)
M o d e
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Document Classification: Proprietary Information
H W
R s t
0x0
0x0
See
Desc.
0x0
0x0
0x0
0x0
CONFIDENTIAL
S W
R s t
0x0
Update
Update
Retain
Retain
0x0
0x0
D e s c r i p t io n
Enable Extended Distance
When using cable exceeding 100 meters, the 10BASE-
T receive threshold must be lowered in order to detect
incoming signals.
0 = Normal 10BASE-T receive threshold
1 = Lower 10BASE-T receive threshold
0 = SIGDET Active High
1 = SIGDET Active Low
MDI/MDIX Crossover
During Hardware Reset register 16.5:4 defaults as fol-
lows
ENA_XC 16.5:4
This setting can be changed by writing to these bits fol-
lowed by software reset.
00 = Transmit on pins MDIP/N[0], Receive on pins
01 = Transmit on pins MDIP/N[1], Receive on pins
1x = Enable Automatic Crossover
SQE Test is automatically disabled in full duplex mode
0 = Disable SQE Test
1 = Enable SQE Test
Polarity Reversal
If Automatic polarity is disabled, then the polarity is
forced to be normal in 10BASE-T mode. Polarity rever-
sal has no effect in 100BASE-TX mode. This bit only
controls polarity correction at the inputs. The output
polarity is not programmable.
0 = Enable automatic polarity reversal
1 = Disable automatic polarity reversal
Disable Jabber
Jabber has no effect in full-duplex or in 100BASE-X
mode.
0 = Enable jabber function
1 = Disable jabber function
0
1
MDIP/N[1]
MDIP/N[0]
00
11
Doc. No. MV-S103657-00, Rev. C
Page 71