AM79C976 datasheet(297/309 Pages) AMD

297 / 309 page

8/01/00

Am79C976

B-2

P R E L I M INARY

Status Register (Register 1)

The MII Management Status Register identifies the

physical and auto-negotiation capabilities of the PHY.

This register is read only; a write will have no effect.

See Table 3.

Table B-3. MII Management Status Register (Register 1)

1RWH

52 5HDG 2QO\ /+ /DWFKLQJ +LJK// /DWFKLQJ /RZ

Bits

Name

Description

Read/Write

(Note 1)

100BASE-T4

1 = PHY able to perform 100BASE-T4

0 = PHY not able to perform 100BASE-T4

100BASE-X Full Duplex

1 = PHY able to perform full-duplex 100BASE-X

0 = PHY not able to perform full-duplex 100BASE-X

100BASE-X Half Duplex

1 = PHY able to perform half-duplex 100BASE-X

0 = PHY not able to perform half-duplex 100BASE-X

10 Mbps Full Duplex

1 = PHY able to operate at 10 Mbps full-duplex mode

0 = PHY not able to operate at 10 Mbps full-duplex mode

10 Mbps Half Duplex

1 = PHY able to operate at 10 Mbps half-duplex mode

0 = PHY not able to operate at 10 Mbps half-duplex mode

10-7

Reserved

Ignore when read

MF Preamble Suppression

1 = PHY will accept management frames with preamble

suppressed

0 = PHY not able to accept management frames with

preamble suppressed

Auto-Negotiation Complete

1 = Auto-Negotiation process completed

0 = Auto-Negotiation process not completed

Remote Fault

1 = remote fault condition detected

0 = no remote fault condition detected

RO, LH

Auto-Negotiation Ability

1 = PHY is able to perform Auto-Negotiation

0 = PHY is not able to perform Auto-Negotiation

2Link Status

1 = link is up

0 = link is down

RO, LL

Jabber Detect

1 = jabber condition detected

0 = no jabber condition detected

Extended Capability

1 = extended register capabilities

0 = basic register set capabilities only

AM79C976 Datasheet(PDF) 297 Page - Advanced Micro Devices

AM79C976 Datasheet(HTML) 297 Page - Advanced Micro Devices

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL