• Energy Detect Power-Down Mode for Reduced Power Consumption When the Cable is Not Attached • Wake-On-LAN (WOL) Support with Robust Custom-Packet Detection • Programmable LED Outputs for Link, Activity, and Speed • Baseline Wander Correction • LinkMD TDR-Based Cable Diagnostic to Identify Faulty Copper Cabling • Parametric NAND Tree Support to Detect Faults Between Chip I/Os and Board • Loopback Modes for Diagnostics • Automatic MDI/MDI-X Crossover to Detect and Correct Pair Swap at all Speeds of Operation • Automatic Detection and Correction of Pair Swaps, Pair Skew, and Pair Polarity • MDC/MDIO Management Interface for PHY Register Configuration • Interrupt Pin Option • Power-Down and Power-Saving Modes • Operating Voltages - Core (DVDDL, AVDDL, AVDDL_PLL): 1.2V (External FET or Regulator) - VDD I/O (DVDDH): 3.3V, 2.5V, or 1.8V - Transceiver (AVDDH): 3.3V or 2.5V (Commercial Temp.) • AEC-Q100 Grade 3 (KSZ9031RNXUA/UB) and Grade 2 (KSZ9031RNXVA/VB) Qualified for Automotive Applications • 48-pin QFN (7 mm × 7 mm) Package