Microprocessor

Details Microprocessor Microprocessor

1998-11-13

2000-11-28

Donaghue, Larry D.

Electrical computers and digital processing systems: processing

Instruction fetching

712 38, 712 35, G06E 1500

Patent

active

061548308

ABSTRACT:
On a microprocessor chip mounting a central processing unit (CPU) for controlling the entire operation of electronic equipment and a digital signal processor (DSP) for processing a specific signal in the electronic equipment, an instruction cache for temporarily storing a DSP program and a cache controller are additionally mounted, and the DSP program and a CPU program are stored in an externally provided instruction memory. The cache controller controls the DSP to wait and interrupts the CPU when a cache miss occurs. The CPU executes a predetermined interrupt processing routine so as to supplement an instruction block including the instruction code from the instruction memory to the instruction cache. Thus, an on-chip memory used for storing instruction codes to be decoded and executed by the DSP can be reduced.

REFERENCES:
patent: 5487173 (1996-01-01), Greiss et al.
patent: 5754878 (1998-05-01), Asghar et al.
patent: 5768613 (1998-06-01), Asghar

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