Galvanically Isolated RS-485 / CAN / SPI Barrier CMTI Immunity & Stitching-Cap EMI Auditor

Deterministic Common-mode transient displacement current I_cm = C_barrier * (dV_cm / dt) vs receiver comparator latch threshold + embedded PCB inter-plane overlap stitching capacitance C_stitch = eps_0*eps_r*A/d engine (.json, .gbr, .kicad_pcb) built for Texas Instruments (ISO77xx/UCC12050), Analog Devices (iCoupler/ADM), Skyworks (Si86xx), Broadcom — zero-upload ephemeral Wasm RAM execution.