| 摘要 |
PURPOSE:To generalize the circuit constitution of a fixed part, and to change a simplified variable part corresponding to a form, a purpose to be used, and the price of a device, by constituting the device by separating into two parts setting a circuit, the change of whose principle or fundamental rule is not required as the fixed part, and setting the circuit varied by a model, etc., as a variable part. CONSTITUTION:An entire circuit is made into a chip by separating it to the fixed part 50 not varied if the principle or the fundamental rule is unchanged, and the variable part 51 desired to be changed or converted at need, and also, at the fixed part 50, plural program ROMs can be switched with one CPU 59. In such a way, it is possible to exchange the variable part 51 corresponding to the model or the purpose to be used, etc., and also, since the number of variable parts 51 is suppressed at necessary minimum, it is possible to generalize the device, and also, since plural program ROMs 60-62 are switched and con trolled by the CPU 59 in a data processing circuit, a control system can be easily constituted, and the circuit constitution can be simplified.
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