82583V Datasheet, PDF (279/374 Pages) Intel Corporation – Intel® 82583V GbE Controller

Driver Programing Interface—82583V GbE Controller
9.2.8.12 Extended Status Register (Any Page), PHY Address 01; Register 15
9.2.8.13
Bits
Field
Mode HW Rst SW Rst
Description
15
1000BASE-X
Full-Duplex
RO
14
1000BASE-X
Half-Duplex
RO
13
1000BASE-T
Full-Duplex
RO
12
1000BASE-T
Half-Duplex
RO
11:0 Reserved
RO
Always 0b Always 0b 0b = Not 1000BASE-X full-duplex capable.
Always 0b Always 0b 0b = Not 1000BASE-X half-duplex capable.
Always 1b Always 1b 1b =1000BASE-T full-duplex capable.
Always 1b Always 1b 1b =1000BASE-T half-duplex capable.
0x000
0x000
Reserved, set to 0x000.
Copper Specific Control Register 1 (Page 0), PHY Address 01; Register
16
Bits
Field
Mode HW Rst
15
Disable
Link Pulses
R/W
0x0
14:12
Downshift
Counter
R/W
0x3
11
Downshift
Enable
R/W
0x0
Force
10
Copper Link R/W 0x0
Good
9:8
Energy
Detect
R/W
See
Description
Enable
7
Extended R/W 0x0
Distance
SW Rst
0x0
Update
Update
Retain
Update
Retain
Description
1b = Disable link pulse.
0b = Enable link pulse.
Changes to these bits are disruptive to the normal
operation; therefore, any changes to these registers
must be followed by software reset to take effect.
1x, 2x,...8x is the number of times the PHY attempts
to establish GbE link before the PHY downshifts to
the next highest speed.
000b = 1x.
100b = 5x.
001b = 2x.
101b = 6x.
010b = 3x.
110b = 7x.
011b = 4x.
111b = 8x.
Changes to these bits are disruptive to the normal
operation; therefore, any changes to these registers
must be followed by software reset to take effect.
1b = Enable downshift.
0 = Disable downshift.
If link is forced to be good, the link state machine is
bypassed and the link is always up. In 1000BASE-T
mode this has no effect.
1b = Force link good.
0b = Normal operation.
After a hardware reset, both bits take on the value of
pd_config_edet_a.
0xb = Off.
10b = Sense only on Receive (energy detect).
11b = Sense and periodically transmit NLP (energy
detect+TM).
When using a cable exceeding 100 meters, the
10BASE-T receive threshold must be lowered in
order to detect incoming signals.
1b = Lower 10BASE-T receive threshold.
0b = Normal 10BASE-T receive threshold.
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