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

BCM5722 Programmer’s Guide
10/15/07
Broadcom Corporation
Page 421 Transceiver Registers Document 5722-PG101-R
AUTO-NEGOTIATION LINK PARTNER ABILITY REGISTER (PHY_ADDR = 0X1, REG_ADDR =
05H)
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 Description Init Access
15 Next Page 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
0RO
14 Acknowledge 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
0RO
13 Remote Fault 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
0RO
12 Reserved
Technologies
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.
0RO
11 Asymmetric Pause 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
0RO
10 Pause Capable 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
0RO
9 100BASE-T4
Capability
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
0RO
8 100BASE-TX Full-
Duplex Capability
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
0RO
7 100BASE-TX Half-
Duplex Capability
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
0RO