Abstract: An apparatus, program product and method are provided for use in automating the design of a custom DSP integrated circuit from a preexisting DSP core block and one or more additional circuit blocks interfaced with the DSP core block. An input display is displayed to a user, and is utilized to receive user input from the user for use in automatically building a custom DSP integrated circuit. The input display includes at least one selection input component for use in selecting at least one optional circuit block for inclusion in the custom DSP integrated circuit, and at least one configuration input component for use in customizing a customizable circuit block to be included in the custom DSP integrated circuit. The user input received from the user through the input display selects the optional circuit block and customizes the customizable circuit block.