Table 483: Auto-Negotiation Link Partner Ability Register (Phy_Addr = 0X1, Reg_Addr = 05H) - Broadcom BCM5722 Programmer's Manual

BCM5722
A -N
UTO EGOTIATION
05 )
H
The values contained in the Auto-negotiation Link Partner Ability Register are only guaranteed to be valid once auto-
negotiation has successfully completed, as indicated by bit 5 of the MII status register.

Table 483: Auto-Negotiation Link Partner Ability Register (PHY_Addr = 0x1, Reg_Addr = 05h)

Bit Field
15 Next Page
14 Acknowledge
13 Remote Fault
12 Reserved
Technologies
11 Asymmetric Pause
10 Pause Capable
9 100BASE-T4
Capability
8 100BASE-TX Full-
Duplex Capability
7 100BASE-TX Half-
Duplex Capability
Page 421 Transceiver Registers
L P A
INK ARTNER BILITY
Description
The BCM5722 Ethernet controller returns a 1 on bit 15 of the Link Partner
Ability register when the link partner wishes to transmit Next Page
information.
• 1 = Link partner has Next Page ability
• 0 = Link partner does not have Next Page ability
The BCM5722 Ethernet controller returns a 1 on bit 14 of the Link Partner
Ability register when the link partner has acknowledged reception of the
link code word, otherwise, it returns a 0.
• 1 = Link partner has received link code word
• 0 = Link partner has not received link code word
The BCM5722 Ethernet controller returns a 1 on bit 13 of the Link Partner
Ability register when the link partner has advertised detection of a remote
fault, otherwise, it returns a 0.
• 1 = Link partner has detected remote fault
• 0 = Link partner has not detected remote fault
Bit 12 of the Link Partner Ability register is reserved for future versions of
the auto-negotiation standard and should be ignored when read. Write as
0, ignore on read.
The BCM5722 Ethernet controller returns a 1 on bit 11 of the Link Partner
Ability register when the link partner has advertised asymmetric pause,
otherwise, it returns a 0.
• 1 = Link partner desires asymmetric pause
• 0 = Link partner does not desire asymmetric pause
The BCM5722 Ethernet controller returns a 1 on bit 10 of the Link Partner
Ability register when the link partner has advertised pause capability,
otherwise, it returns a 0.
• 1 = Link partner is capable of pause operation
• 0 = Link partner not capable of pause operation
The BCM5722 Ethernet controller returns a 1 on bit 9 of the Link Partner
Ability register when the link partner has advertised 100BASE-T4
capability, otherwise, it returns a 0.
• 1 = Link partner is 100BASE-T4 capable
• 0 = Link partner is not 100BASE-T4 capable
The BCM5722 Ethernet controller returns a 1 on bit 8 of the Link Partner
Ability register when the link partner has advertised 100BASE-TX full-
duplex capability, otherwise, it returns a 0.
• 1 = Link partner is 100BASE-TX full-duplex capable
• 0 = Link partner is not 100BASE-TX full-duplex capable
The BCM5722 Ethernet controller returns a 1 on bit 7 of the Link Partner
Ability register when the link partner has advertised 100BASE-TX half-
duplex capability, otherwise, it returns a 0.
• 1 = Link partner is 100BASE-TX half-duplex capable
• 0 = Link partner not 100BASE-TX half-duplex capable
Bro adco m C orp or atio n
R (PHY_A
EGISTER DDR
Programmer's Guide
10/15/07
= 0 1, R _A =
X EG DDR
Init Access
0 RO
0 RO
0 RO
0 RO
0 RO
0 RO
0 RO
0 RO
0 RO
Document 5722-PG101-R