Function display circuit and method thereof in an electronic system

A function display method for a device having a plurality of function parts, a function selecting switching part, a first display part and a second display part, said function display method comprising the steps of:

• determining with logic control means comprising a first microcomputer and a second microcomputer, and with said first microcomputer controlling said second microcomputer according to said function selecting switching part so as to provide a function display signal to said second display part, whether a user has designated a selected function part by using a function decision process comprising conducting a first decision step for deciding if the switching state of said function selecting switching part is for a first function part and if said function selecting switching part is not for said first function part then conducting a second decision step for deciding if the switching state of said function selecting switching part is for one of either a second function part and a third function part;
• preventing display of a non-selected function part with a function stop process of said logic control means for stopping said first display part and said second display part from indicating an operating state and the function of said non-selected function part;
• and
• displaying said selected function part on a basis of said function display signal, with a function display process for displaying the operating state and the function of said selected function part on said first display part and said second display part, respectively.

A display circuit for a device having a plurality of selectable functions, comprising:

• means for selecting one of said functions,
• first display means for indicating the selected function,
• second display means for displaying an operating condition of said selected function,
• control means operatively connected to said selecting means and said first display means, comprising a first microcomputer and a second microcomputer, said first microcomputer controlling said second microcomputer according to said switching means so as to provide a function display signal to said first display means for altering said first display means to indicate the identity of said selected one of said functions.