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LAN89730 Fiches technique(PDF) 83 Page - Microchip Technology

No de pièce LAN89730
Description  Implements Reduced Power Operating Modes
PDF  218 Pages
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Fabricant  MICROCHIP [Microchip Technology]
Site Internet  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

LAN89730 Fiches technique(HTML) 83 Page - Microchip Technology

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 2013-2015 Microchip Technology Inc.
DS60001348A-page 83
LAN89730
Note 4-25
The device’s 10/100 PHY internal CRS signal operates in two modes: Active and Low. When in Active
mode, the internal CRS will transition high and low upon line activity, where a high value indicates a
carrier has been detected. In Low mode, the internal CRS stays low and does not indicate carrier
detection. The internal CRS signal and No Carrier (bit 10 of the TX Status Word) cannot be used as
a verification method of transmitted packets when transmitting in 10/100 Mbps full-duplex mode.
TABLE 4-55:
CRS BEHAVIOR
Mode
Speed
Duplex
Activity
CRS Behavior
Note 4-25
Manual
10 Mbps
Half-Duplex
Transmitting
Active
Manual
10 Mbps
Half-Duplex
Receiving
Active
Manual
10 Mbps
Full-Duplex
Transmitting
Low
Manual
10 Mbps
Full-Duplex
Receiving
Active
Manual
100 Mbps
Half-Duplex
Transmitting
Active
Manual
100 Mbps
Half-Duplex
Receiving
Active
Manual
100 Mbps
Full-Duplex
Transmitting
Low
Manual
100 Mbps
Full-Duplex
Receiving
Active
Auto-Negotiation
10 Mbps
Half-Duplex
Transmitting
Active
Auto-Negotiation
10 Mbps
Half-Duplex
Receiving
Active
Auto-Negotiation
10 Mbps
Full-Duplex
Transmitting
Low
Auto-Negotiation
10 Mbps
Full-Duplex
Receiving
Active
Auto-Negotiation
100 Mbps
Half-Duplex
Transmitting
Active
Auto-Negotiation
100 Mbps
Half-Duplex
Receiving
Active
Auto-Negotiation
100 Mbps
Full-Duplex
Transmitting
Low
Auto-Negotiation
100 Mbps
Full-Duplex
Receiving
Active



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