Data Sheet

Programming Interface — Ethernet Controller I210
563
11 Downshift Enable R/W 0x0 Update
Changes to these bits are disruptive to the normal operation. As a
result, any changes to these registers must be followed by
software reset to take effect.
1b = Enable downshift.
0b = Disable downshift.
10
Force Copper Link
Good
R/W 0x0 Retain
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.
9:7 Energy Detect R/W Update
0xxb = Off.
100b = Sense only on receiver (energy detect), auto wake up.
101b = Sense only on receiver (energy detect), SW wake up.
110b = Sense and periodically transmit NLP (energy detect and
TM), auto wake up.
111b = Sense and periodically transmit NLP (energy detect and
TM), software wake up.
6:5
MDI Crossover
Mode
R/W
See
Descr.
Update
Changes to these bits are disruptive to the normal operation. As a
result, any changes to these registers must be followed by a
software reset to take effect.
Upon hardware reset or auto-negotiation restart, this field takes its
default value from the setting of IPCNFG.Enable Automatic
Crossover bit, either 00b or 11b.
00b = Manual MDI configuration.
01b = Manual MDIX configuration.
10b = Reserved.
11b = Enable automatic crossover for all modes.
4
Energy Detect
wake up control
R/W or
RO, SC
0x0 0x0
This bit controls how PHYG wakes up from the energy detect state.
If 16_0.7 = 0b (software wake up), this register bit is in R/W
mode. When software writes a 1b to this bit , it wakes up the PHYG
from the energy detect state. If 16_0.7 = 1b, PHYG wakes up from
the energy detect state automatically based on the energy
detected from line. This bit self clears after PHYG leaves the energy
detect state.
3
Copper Transmitter
Disable
R/W 0x0 Retain
1b = Transmitter disable.
0b = Transmitter enable.
2 Power Down R/W 0x0 Retain
Power down is controlled via register 0_0.11 and 16_0.2. Both bits
must be set to 0b before the PHY transitions from power down to
normal operation.
When the port is switched from power down to normal operation,
software reset and restart auto-negotiation are performed even
when bits Reset (0_0.15) and Restart Auto-Negotiation (0_0.9) are
not set by the user.
1b = Power down.
0b = Normal operation.
1
Polarity Reversal
Disable
R/W 0x0 Retain
If polarity is disabled, then the polarity is forced to be normal in
10BASE-T.
1b = Polarity reversal disabled.
0b = Polarity reversal enabled The detected polarity status is
shown in register 17_0.1, or in 1000BASE-T mode, 21_5.3:0.
0 Disable Jabber R/W 0x0 Retain
Jabber has effect only in 10BASE-T half-duplex mode.
1b = Disable jabber function.
0b = Enable jabber function.