Datasheet

ENC424J600/624J600
DS39935C-page 114  2010 Microchip Technology Inc.
REGISTER 12-6: PHANLPA: PHY AUTO-NEGOTIATION LINK PARTNER ABILITY REGISTER
R-0 R-0 R-0 R-0 R-0 R-0 R-0 R-0
LPNP LPACK LPFAULT
r LPPAUS1 LPPAUS0 LP100T4 LP100FD
bit 15 bit 8
R-0 R-0 R-0 R-0 R-0 R-0 R-0 R-0
LP100 LP10FD LP10 LPIEEE4 LPIEEE3 LPIEEE2 LPIEEE1 LPIEEE0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15
LPNP: Link Partner Next Page Ability bit
1 = Link partner PHY supports auto-negotiation next page abilities
0 = Link partner PHY does not support auto-negotiation next page abilities
bit 14
LPACK: Link Partner Acknowledge Local PHY Code Word Status bit
1 = Link partner PHY has successfully received the local PHY abilities saved in PHANA
0 = Link partner PHY has not received the local PHY abilities saved in PHANA
bit 13
LPFAULT: Link Partner Remote Fault Condition bit
1 = Link partner PHY has a Fault condition present
0 = Link partner PHY does not have a Fault condition present
bit 12
Reserved: Ignore on read
bit 11-10
LPPAUS<1:0>: Link Partner PAUSE Flow Control Ability bits
11 = Link partner supports both symmetric PAUSE and asymmetric PAUSE toward local device. Link
partner generates and responds to PAUSE control frames. Alternatively, if the local device only
supports asymmetric PAUSE, the link partner will respond to PAUSE control frames, but not
generate any.
10 = Link partner supports asymmetric PAUSE toward local device only; it can transmit PAUSE control
frames, but cannot act upon PAUSE frames sent to it
01 = Link partner supports symmetric PAUSE only, and generates and responds to PAUSE control
frames
00 = Link partner does not support PAUSE flow control
bit 9
LP100T4: Link Partner 100Base-T4 Ability bit
1 = Link partner PHY is capable of operating in 100Base-T4 mode
0 = Link partner PHY is incapable of operating in 100Base-T4 mode
bit 8
LP100FD: Link Partner 100Base-TX Full-Duplex Ability bit
1 = Link partner PHY is capable of 100Base-TX full-duplex operation
0 = Link partner PHY is incapable of 100Base-TX full-duplex operation
bit 7
LP100: Link Partner 100Base-TX Half-Duplex Ability bit
1 = Link partner PHY is capable of 100Base-TX half-duplex operation
0 = Link partner PHY is incapable of 100Base-TX half-duplex operation
bit 6
LP10FD: Link Partner 10Base-T Full-Duplex Ability bit
1 = Link partner PHY is capable of 10Base-T full-duplex operation
0 = Link partner PHY is incapable of 10Base-T full-duplex operation
bit 5
LP10: Link Partner 10Base-T Half-Duplex Ability bit
1 = Link partner PHY is capable of 10Base-T half-duplex operation
0 = Link partner PHY is incapable of 10Base-T half-duplex operation
bit 4-0
LPIEEE<4:0>: Link Partner IEEE Standard Selector Field bits
00001 = IEEE 802.3 Std.
All other values are reserved by IEEE. Remote node should also specify this as the selector value.