Method of controlling a set point

摘要

A set point control method and apparatus for controlling many set points of an electronic apparatus by using a simple switch is disclosed. A switch condition is repeatedly detected, and a difference of the switch conditions is obtained when a former switch condition is different from the present switch condition. If a switch is a rotary digital switch for selecting one of a plurality of digital words, the difference is defined by the rotation direction of the switch and a difference of the former and present digital words. A memory stores a plurality of set information, and is addressed in accordance with the difference for controlling the set point of the electronic apparatus.