Patent ID: 6636938
Filing Date: 2003-10-21
Classification: G10H

Abstract:
A sound generator, comprising:a CPU interface and clock generating unit connected with a central processing unit (CPU) for synchronizing a signal received from the CPU with a main clock of the sound generator, storing instructions of the CPU, and supplying an internal clock signal; an operation code memory for generating an operation code which is needed for an operation of the sound generator in accordance with an operation signal outputted from the CPU interface and clock generating unit; a memory controlling unit for outputting an address of parameters, necessary for each signal processing, in accordance with the operation code outputted from the operation code memory; a data memory for storing the parameters which are needed for each signal processing, such as a filter coefficient, an envelop index number, and an algorithm information; a signal processing unit for receiving the operation code outputted from the operation code memory and performing a signal processing in accordance with the parameters outputted from the data memory; an external memory address generating unit for generating an address of an external memory storing sound data in accordance with the operation code outputted from the operation code memory; and a DRAM download control unit for downloading data to a DRAM at high speed in accordance with a DRAM download signal outputted from the CPU.