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LAN89218 Datasheet(PDF) 68 Page - Microchip Technology

Part # LAN89218
Description  High-Performance Single-Chip 10/100 Ethernet Controller for Automotive Applications
PDF  148 Pages
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Manufacturer  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

LAN89218 Datasheet(HTML) 68 Page - Microchip Technology

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LAN89218
DS60001255B-page 68
 2008-2015 Microchip Technology Inc.
Note 1:
The LAN89218 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 4-2:
CRS BEHAVIOR
Mode
Speed
Duplex
Activity
CRS Behavior
(see Note 1)
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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