| 摘要 |
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.
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