CLOCK CONTROL CIRCUIT

摘要

PURPOSE:To vary a duty and a skew in a processor by providing tri-state elements, and selecting a desired tri-state element and supplying an internal clock. CONSTITUTION:The tri-state elements 51a - 51c, and 52a - 52c output internal clocks phi1A and phi2A which differ in rising time and falling time from applied two-phase clocks phi1 and phi2. Desired tri-state elements are selected among those tri-state elements 51a - 51c and 52a - 52c with element selection signals ES1 - ES3 from an element selecting circuit 6 and the internal clocks phi1A and phi2A which are outputted by the selected tri-state elements 51a - 51c and 52a - 52c and varied in rising time and falling time are supplied to other internal circuits in the processor.