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10Base-T PHY Registers
A-45
Register Definitions
A.4.4 Autonegotiation Advertisement Register–AN_adv @ 0x4
Selector fieldTechnology ability fieldTLRFLTReserved0
Byte 0Byte 1
01234567
89101112131415
Table A–21. Autonegotiation Advertisement Register Bits
Bit Name Function
15 0 Autonegotiation next page: Reception/transmission of autonegotiation next pages is
optional and not supported by this PHY.
14 Reserved For internal use of the autonegotiation process.
13 TLRFLT TLAN remote fault: This bit enables TLAN to indicate a remote fault condition to the link
partner.
12–5 Technology
ability field
Autonegotiation advertised technology ability: This 8-bit value is sent to the link-partner
to indicate the abilities of the TLAN PHY. Unsupported abilities cannot be advertised,
which for this PHY means only two bits have meaning when set:
Bit 6: PHY supports full-duplex 10Base-T
Bit 5: PHY supports half-duplex 10Base-T
Bits 12 through 7 are read only, and set to 0.
4–0
Selector field Autonegotiation selector field code: This field has a hardwired value of 0001, meaning
the PHY only supports 802.3 format link code words.