The official hardware design documentation (schematics, user manuals, and design packages) provided directly by NXP and its authorized distributors exclusively reference the legacy mini-B USB layout (such as the Rev D/E schematics). NXP never released an official hardware revision of the classic FRDM-KL25Z board featuring an onboard USB-C port; all original factory production runs utilized the mini-B physical interface for both OpenSDA debug and MCU USB connectivity.