Per the WIZnet W5100S reference schematic (note 4: "to avoid the 100M
overshoot, place the 49.9 resistors and 0.1uF capacitor near the MDI
pin"): R26/R27 (49.9R 1%) from TXOP/TXON to a common node bypassed by
C18 (100nF) to GND, and R28/R29 + C19 likewise for RXIP/RXIN. Attached
on the PHY-side nets (chip side of D4/D5). BOM fields populated
(UNI-ROYAL 0402WGF4999TCE / LCSC C25120, Samsung CL05B104KO5NNNC /
C1525). Optional 3.3R series dampers deliberately omitted.
Schematic only - the 6 footprints still need placing/routing next to
U11 pins 2/3/5/6 (Update PCB from Schematic). DRC parity reports
exactly those 6 missing footprints and nothing else.
Verified: ERC 0, netlist 107->113 components, termination nets match
the reference topology.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Roflin
8e364a4655