| 摘要 |
<p>PURPOSE:To attain effective utilization for one-chip CPU, etc., by eliminating the need to assign a characteristic terminal to an electric power feed flag, by inputting the state of the electric power feed flag and that of a existent special flag to CPU through its common terminal. CONSTITUTION:For CPU104 of one-chip constitution, etc., input terminal (input- output pin) PIN (IN) assigned to existent special flag 101 provided after the operation start of CPU104 is used in common to input the state of electric power feed flag 102 in an initialization routine or that of flag 101 after the CPU operation start to CPU104. In the constitution like this, CPU104 refers to flag 102 only in the initialization routine and is reset without fail after the end of the initialization routine. Consequently, there is no problem in managing with one input terminal PIN(IN) and the need to assign a characteristic terminal to flag 102 is eliminated.</p> |
