SLXT973QC Cortina Systems Inc, SLXT973QC Datasheet - Page 34

• Manufacturer Part Number: SLXT973QC
• Manufacturer: Cortina Systems Inc

Specifications of SLXT973QC

• Lead Free Status / Rohs Status: Not Compliant

LXT973 Transceiver
Datasheet
249426, Revision 6.0
13 July 2007
3.6.1.5
Figure 8
3.7
3.7.1
Cortina Systems
Parallel Detection
In parallel with auto-negotiation, the LXT973 Transceiver also monitors for 10 Mbps
Normal Link Pulses (NLP) or 100 Mbps IDLE symbols. If either is detected, the device
automatically reverts to the corresponding operating mode. Parallel detection allows the
LXT973 Transceiver to communicate with devices that do not support auto-negotiation.
The established link is always set at half-duplex.
Auto-Negotiation Operation
Network Media/Protocol Support
The LXT973 Transceiver supports both 10BASE-T and 100BASE-TX Ethernet over
twisted-pair, or 100 Mbps Ethernet over fiber media (100BASE-FX).
10/100 Mbps Network Interface
The network interface port consists of five external pins (two differential signal pairs and a
signal detect pin). The differential signal pins are shared between twisted-pair and fiber.
Refer to
The LXT973 Transceiver output drivers generate either 100BASE-TX, 10BASE-T, or
100BASE-FX output. When not transmitting data, the LXT973 Transceiver generates
IEEE 802.3-compliant link pulses or an IDLE code. Input signals are decoded either as a
100BASE-TX, 100BASE-FX, or 10BASE-T input, depending on the mode selected. Auto-
negotiation/parallel detection or manual control is used to determine the speed of this
interface.
®
LXT973 10/100 Mbps Dual-Port Fast Ethernet PHY Transceiver
Auto-Negotiation
Go To Forced
Settings
Figure 3 on page 24
Disable
Done
0.12 = 0
Power-Up, Reset,
for specific pin assignments.
Link Failure
Check Value
Attempt Auto-
Start
0.12
Negotiation
0.12 = 1
YES
Listen for 100TX
Auto-Negotiation/Parallel Detection
Idle Symbols
Link Set?
3.7 Network Media/Protocol
Enable
NO
Listen for 10T
Link Pulses
Support
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