LU82551QM Intel, LU82551QM Datasheet - Page 46

• Manufacturer Part Number: LU82551QM
• Manufacturer: Intel

Specifications of LU82551QM

• Operating Supply Voltage (typ): 3.3V
• Operating Supply Voltage (min): 3V
• Operating Supply Voltage (max): 3.6V
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Pin Count: 196
• Lead Free Status / RoHS Status: Compliant

82551QM — Networking Silicon
6.4
40
Figure 11. Auto-Negotiation and Parallel Detect
LED Description
The PHY unit supports three LED pins to indicate link status, network activity and network speed.
Each pin can source 10 mA.
MDI register 27 in
information for LED function mapping and support enhancements.
Figure 12
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•
•
Link: This LED is off until a valid link has been detected. After a valid link has been detected,
the LED will remain on (active-low).
Activity: This LED blinks on and off when activity is detected on the wire.
Speed: This LED will be on if a 100BASE-TX link is detected and off if a 10BASE-T link is
detected. If the link fails while in Auto-Negotiation, this LED will keep the last valid link
state. If 100BASE-TX link is forced this LED will be on, regardless of the link status. This
LED will be off if the 10BASE-T link is forced, regardless of the link status.
provides possible schematic diagrams for configurations using two and three LEDs.
Auto-Negotiation capable = 0
Section 11.3.12, “Register 27: PHY Unit Special Control Register”
Look at Link Pulse;
Parallel Detection
100Base-TX Link
10Base-T or
Ready
Auto-Negotiation Complete bit set
parallel detect or auto-
Ability detect either by
negotiation.
LINK PASS
Force_Fail
FLP capable
Auto-Negotiation
Auto-Negotiation capable = 1
Ability Match
Datasheet
details the