| 摘要 |
<p>PURPOSE:To ensure the effective actuation of an IC by selecting the contents of input for start of an interruption according to the state set previously to an FF and forms an interruption controlling signal. CONSTITUTION:An IC1 has a stand-by mode where all circuits stop their operations excepting for a clock generator 4 and a liquid crystal display circuit 3. Then the stopped circuits are started again via a start control circuit 5 when an exclusive OR output obtained between key inputs K1-K5 applied from a gate circuit 7 and an output signal C of an FF6 is set at ''1''. The state of the FF6 is controlled by a program and set before a stand-by mode is set. Then a state ''1'' or ''0'' is decided for the IC1. In other words, a start mode is set in case the signal C is ''0'' and either one of inputs K1-K5 is set at ''1'' or in case the inputs K1-K5 are all set at ''0'' with the signal C set at ''1'' respectively.</p> |
