88E1111 Datasheet, PDF (160/252 Pages) List of Unclassifed Manufacturers – Integrated 10/100/1000 Ultra Gigabit Ethernet Transceiver

88E1111
Integrated 10/100/1000 Ultra Gigabit Ethernet Transceiver
Table 84: PHY Specific Control Register (Continued)
Page Any, Register 16
Bits Field
Mode
6:5
MDI Crossover R/W
Mode
4
Disable
R/W
125CLK
HW
Rst
See
Descr
See
Descr
SW
Rst
Update
Update
Description
Changes to these bits are disruptive to the normal oper-
ation; therefore, any changes to these registers must be
followed by a software reset to take effect.
Upon hardware reset this bit defaults as follows
ENA_XC ANEG[3:0] Bits 16.6:5
1
1xxx
11
1
x1xx
11
0
xxxx
01(for multiple port device)
0
xxxx
00(for single port device)
x
00xx
01(for multiple port device)
x
00xx
00(for single port device)
00 = Manual MDI configuration
01 = Manual MDIX configuration
10 = Reserved
11 = Enable automatic crossover for all modes
Changes to this bit are disruptive to the normal opera-
tion; therefore, any changes to these registers must be
followed by a software reset to take effect.
Upon hardware reset this bit defaults as follows
DIS_125
Bit 16.4
0
0
1
1
1 = 125CLK low
0 = 125CLK toggle
3
MAC
R/W
0x1
Update Changes to this bit are disruptive to the normal opera-
Interface Power
tion; therefore, any changes to these registers must be
Down
followed by a software reset to take effect.
This bit determines whether MAC interface powers
down when Register 0.11 is used to power down the
device or when the PHY enters the energy detect state.
In modes 0111 or 0011 RX_CLK will not toggle when in
Power Down mode.
1 = Always power up
0 = Can power down
2
SQE test
R/W
0x0
Retain SQE Test is automatically disabled in full-duplex mode
regardless of the state of Register 16.2.
1 = SQE test enabled
0 = SQE test disabled
1
Polarity Rever- R/W
0x0
Retain If polarity is disabled, then the polarity is forced to be
sal
normal in 10BASE-T.
1 = Polarity Reversal Disabled
0 = Polarity Reversal Enabled
Doc. No. MV-S100649-00, Rev. E
Page 160
CONFIDENTIAL
Document Classification: Proprietary Information
Copyright © 2004 Marvell
November 19, 2004, Advance