The purpose of this application note is to provide STR73x family device users with a number of recommendations on the HW circuitry connected to the main special pins. It covers the pins for power supply (digital and analog), reset, crystal oscillator, the decoupling of the internal voltage regulator, boot modes, test pin, RC oscillator biasing pin and the JTAG debug port. Detailed reference design schematics of the STR730-EVAL board are also contained in this document with descriptions of the main components, interfaces and modes.