FT232H Pins used in an MPSSE 13 : TCK/SK 14 : TDI/DI 15 : TDO/DO 16 : TMS/CS On the Adafruit FT232H Breakout / CJMCU (clone) Breakout FT232H Function D0 (13) ADBUSS0 TCK/SK D1 (14) ADBUSS1 TDI/DI D2 (15) ADBUSS2 TDO/DO D3 (16) ADBUSS3 TMS/CS