Electronic tone generator system with CPU and DSP

Details Electronic tone generator system with CPU and DSP Electronic tone generator system with CPU and DSP

1994-06-10

1996-10-22

Witkowski, Stanley J.

Music

Instruments

Electrical musical tone generation

G10H 118

Patent

active

055679005

ABSTRACT:
A tone signal control system for controlling a tone signal supplied from a tone generator. The tone signal control system includes a CPU for executing a computational and control operation in accordance with an externally stored program, a DSP for executing a computational and control operation in accordance with an internally stored program, a memory accessible by both CPU and DSP, and an access controller for controlling an access by CPU and DSP to the memory. The access controller calculates a logical product of a clock signal, an access signal from CPU, and an access signal from DSP, and outputs the logical product as a CPU wait signal. The tone signal control system is not required to increase the number of pins too many even if CPU and DSP are assembled on a single chip.

REFERENCES:
patent: 5200564 (1993-04-01), Usami et al.
patent: 5376750 (1994-12-01), Takeda et al.

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