Patent ID: 6314508
Filing Date: 2001-11-06
Classification: G06F

Abstract:
A one-chip microcomputer, comprising:a RISC type microprocessor, said RISC type microprocessor being a pipeline processor and including a bypass circuit for generating a flag corresponding to a result of a comparison instruction so that the result of the comparison instruction is available for use in the same pipeline cycle in which the comparison instruction was executed;a data bus of said RISC type microprocessor;a coprocessor having a plurality of general purpose registers and a plurality of dedicated control registers, wherein one or more of said control registers are mapped as internal registers for said RISC type processor; andtransferring means provided independently from said data bus of the RISC type microprocessor, dedicatedly used by the coprocessor, and adapted for transferring data between a shared system memory and said coprocessor independent of said RISC type microprocessor.