Digital system, clock signal adjusting method for digital system, recording medium recording processing program executed in the adjusting method

摘要

A digital system ( 1 ) which performs a digital processing according to a single or a plurality of clock signals to deliver a specified basic function, and which comprises a plurality of delay elements ( 4 ) respectively inserted into a plurality of clock circuits for supplying clock signals in a digital system, and respectively constituted by circuit elements for changing delay times according to values indicated by a control signal, and a plurality of holding circuits ( 5 ) for holding a plurality of control signals to be given to a plurality of delay elements. The plurality of holding circuits have a plurality of control signal values, held by these holding circuits, changed by external devices ( 6 - 8 ) according to a probabilistic search method with the digital system ( 1 ) supplied with power from a variable-output-voltage power supply ( 14 ) so that the basic function of the digital system satisfies specified specifications.