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MX98728EC

GMAC SINGLE CHIP 10/100 FAST ETHERNET CONTROLLER FOR GENERIC APPLICATION

Macronix International 

MX98728EC

NWAY Configuration Register : NWAYC (Reg 30h), R/W, default=84h

Bit

30.0

30.1

30.2

30.[5:3]

30.6

30.7

Symbol

FD

PS100/10

ANE

ANS[2:0]

NTTEST

LTE

Description

Full Duplex Mode: Set 1 to force the full duplex mode. The default is 0, meaning

the half duplex mode. This bit is meaningful only if ANE = 0

Port Select 100/10 bit : Default is 0, meaning the 10 Base-T mode.

Autonegotiation Enable: Set to enable the NWAY function. Default is set. ANS[2:0]

should be written 001 to restart the autonegotiation sequence after ANE is set.

Autonegotiation status bits: Read only for the NWAY status, except when write

001 will restart the autonegotiation sequence. The MSB is the Reg30h.5 bit when

Nway settles down in one network mode, one bit of Reg31.4~Reg 31.7 will be set

to indicate the chosen network mode.

Autonegotiation Arbitration State, arbitration states are defined

000 = Autonegotiation disable

001 = Transmit disable

010 = ability detect

011 = Acknowledge detect

100 = Complete acknowledge detect

101 = FLP link good; autonegotiation complete

110 = Link check

Reserved

Link Test Enable : Default is high, meaning the link check is always enabled.

Reset forces a good link in the 10 Base-T mode for the testing purpose.

NWAY Status Register : NWAYS (Reg 31h), RO, default=00h

Bit

Symbol

Description

31.0

LS10

Physical Link Status of 10 Mbps TP : Set for a good link in 10 Base-T.

31.1

LS100

Physical Link Status of 100 Mbps TP : Set for a good link in 100 Base-TX.

31.2

LPNWAY Link Partner NWAY Status : 1 to indicate the link partner is capable of NWAY

support. Reset for the non-NWAY link partner.

31.3

ANCLPT Auto-negotiation Completion : Set to indicate that a normal NWAY state machine

completion. Reset for incomplete state.

31.4

100TXF NWAY 100 TX Full_duplex Mode : Set to indicate NWAY is settled down in the

100 TX full duplex mode.

31.5

100TXH NWAY 100 TX Half_dulpex Mode : Set to indicate NWAY is settled down in the

100 Base-T half duplex mode.

31.6

10TXF

NWAY 10 TX Full_duplex Mode : Set to indicate NWAY is settled down in the 10

Base-T full duplex mode.

31.7

10TXH

NWAY 10 TX Half_duplex Mode : Set to indicate NWAY is settled down in the 10

Base-T half duplex mode.

P/N:PM0723

REV. 1.0, JUL. 13, 2000

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