Data Sheet

Programming Interface — Ethernet Controller I210
557
8.27.3.6 Copper Link Partner Ability Register (Base Page) - Page 0, Register 5
6
10BASE-TX Full-
Duplex
R/W Update
A write to this register bit does not take effect until any one of the
following occurs:
• Software reset is asserted (register 0_0.15).
• Restart auto-negotiation is asserted (register 0_0.9).
• Power down (register 0_0.11, 16_0.2); transitions from power
down to normal operation and the copper link goes down.
If register 0_0.12 is set to 0b and speed is manually forced to 1000
Mb/s in registers 0_0.13 and 0_0.6, then auto-negotiation will still
be enabled and only 1000BASE-T full-duplex is advertised if
register 0_0.8 is set to 1b, and 1000BASE-T half-duplex is
advertised if 0_0.8 set to 0b.
Registers 4_0.8:5 and 9_0.9:8 are ignored.
Auto-negotiation is mandatory per IEEE for proper operation in
1000BASE-T. 1b = Advertise.
0b = Not advertised.
5
10BASE-TX Half-
Duplex
R/W Update
A write to this register bit does not take effect until any one of the
following occurs:
• Software reset is asserted (register 0_0.15).
• Restart auto-negotiation is asserted (register 0_0.9).
• Power down (register 0_0.11, 16_0.2); transitions from power
down to normal operation and the copper link goes down.
If register 0_0.12 is set to 0b and speed is manually forced to 1000
Mb/s in registers 0_0.13 and 0_0.6, then auto-negotiation will still
be enabled and only 1000BASE-T full-duplex is advertised if
register 0_0.8 is set to 1b, and 1000BASE-T half-duplex is
advertised if 0_0.8 set to 0b.
Registers 4_0.8:5 and 9_0.9:8 are ignored.
Auto-negotiation is mandatory per IEEE for proper operation in
1000BASE-T. 1b = Advertise.
0b = Not advertised.
4:0 Selector Field R/W 0x01 Retain
Selector Field Mode.
00001b = 802.3.
Bits Field Mode HW Rst SW Rst Description
15 Next Page RO 0x0 0x0
Received Code Word Bit 15.
1b = Link partner capable of next page.
0b = Link partner not capable of next page.
14 Acknowledge RO 0x0 0x0
Acknowledge Received Code Word Bit 14.
1b = Link partner received link code word.
0b = Link partner does not have Next Page ability.
13 Remote Fault RO 0x0 0x0
Remote Fault Received Code Word Bit 13.
1b = Link partner detected remote fault.
0b = Link partner has not detected remote fault.
12
Technology Ability
Field
RO 0x0 0x0 Received Code Word Bit 12.
11 Asymmetric Pause RO 0x0 0x0
Received Code Word Bit 11.
1b = Link partner requests asymmetric pause.
0b = Link partner does not request asymmetric pause.
10 Pause Capable RO 0x0 0x0
Received Code Word Bit 10.
1b = Link partner is capable of pause operation.
0b = Link partner is not capable of pause operation.
9
100BASE-T4
Capability
RO 0x0 0x0
Received Code Word Bit 9.
1b = Link partner is 100BASE-T4 capable.
0b = Link partner is not 100BASE-T4 capable.