MTD981AG Ver la hoja de datos (PDF) - Myson Century Inc

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componentes Descripción

Fabricante

MTD981AG

10/100 Ethernet Transceiver

Myson Century Inc 

MYSON

TECHNOLOGY

MTD981A

REGISTER DESCRIPTIONS

Register 0. Control Register

Bit Name

R/W Def

15 RST

RW,S 0

C

14 LPBK

RW 0

13 SPEED RW 1

12 ANEN

RW 1

11 PWDN RW 0

10 ISO

RW 1

9 RESTART_ RW,S 0

AN

C

8 DUPLEX RW 0

7 COLTST RW 0

6:0 -

--

Description

Reset

1 = reset.

0 = Normal operation.

Loopback select.

1 = Loopback

0 = Normal operation.

Speed select.

1 = 100Mbps selected.

0 = 10Mbps selected.

Autonegotiation enable.

1 = Enabled.

0 = Disabled.

Power down enable.

1 = Power down.

0 = Normal operation.

MII isolation.

1 = Isolation.

0 = Normal operation.

Restart autonegotiation.

1 = Restart.

0 = Normal operation.

Duplex mode select.

1 = Full Duplex.

0 = Half Duplex.

Collision test enable.

1 = Enable.

0 = Disable.

reserve

Register 1. Status Register

Bit Name

R/W Def

15 T4

R0

14 TXFD

R1

13 TXHD

R1

12 TPFD

R1

11 TPHD

R1

10:7 -

--

6 SPREM R 1

5 ANC

R0

4 RF

R,LH 0

3 AN

2 LINK

R1

R/LL 0

1 JAB

R/LH 0

0 EXT

R1

Description

Not capable of T4 operation.

Capable of 100-TX full duplex operation.

Capable of 100-TX half duplex operation.

Capable of 10-TP full duplex operation.

Capable of 10-TP half duplex operation.

Reserved.

Accepting MII frames with preamble suppressed.

1 = Auto-Negotiation complete.

0 = Auto-Negotiation not complete.

1 = Remote fault detected.

0 = No remote fault.

1 = Capable of Auto-Negotiation operation.

1 = Link established.

0 = Link not established.

1 = Jabber detected.

0 = Jabber not detected.

1 = Extended registers exist.

10

MTD981A Revision 1.2 02/19/2001

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