| 摘要 |
PURPOSE:To make performance inherent in a microprocessor bring into full play, by letting the microprocessor, doing program control over an automatic transmission system, perform discrimination of a speed reducing ratio with one terminal alone. CONSTITUTION:A voltage discrimination circuit 9c of a microprocessor 9a is connected to an external voltage terminal via one pin Pi among n pieces of pins P1-Pn. This voltage discrimination circuit 9c discriminates the voltage inputted via the pin Pi be stages, and discrimination information corresponding to the value is delivered to a circuit 9d. During program control over an automatic transmission system, this information is utilized as selective information in the case where program selection takes place in relation to a speed reducing ratio in a speed change gear part. |
