Datasheet

High Performance Single-Chip 10/100 Non-PCI Ethernet Controller
Datasheet
SMSC LAN9118 65 Revision 1.5 (07-11-08)
DATASHEET
Note 4.1 The LAN9118 10/100 PHY CRS signal operates in two modes: Active and Low. When in
Active mode, CRS will transition high and low upon line activity, where a high value
indicates a carrier has been detected. In Low mode, CRS stays low and does not indicate
carrier detection. The CRS signal cannot be used as a verification method of transmitted
packets when transmitting in 10 or 100 Mbps in full-duplex mode.
Table 4.2 CRS Behavior
MODE SPEED DUPLEX ACTIVITY
CRS BEHAVIOR
(Note 4.1)
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