CLOCK SUPPLY SYSTEM OF INTEGRATED CIRCUIT

摘要

PURPOSE:To reduce clock skew, by providing a clock driver in which wirings of clock signals of each phase are wired for each function block and a circuit constant in matching with a load of the clock wirings is set. CONSTITUTION:Functional blocks (FBs) 2 are placed on an LSI chip 1 and clock signals are applied from a clock driver 5 to the FBs 2 via clock wirings 6. Each FB2 is provided with a basic cell 3 and a clock cell 4 for wave shape. The circuit constant of the driver 5 is set to correct a delay in response to the number of loads in the FBs 2 and the length of wires to the FBs 2.