| 摘要 |
<p>PURPOSE:To read out the count value of a timer, etc., with no mistake by applying the control of a control signal to decide whether the signal should be supplied directly to the external terminal of a microcomputer or synchronously with a clock of the microcomputer. CONSTITUTION:An external input signal supplied directly to an external terminal 1 or an external input signal synchronized with a system clock phi is obtained at a contact 9 under the control of a control signal 5. Therefore the count value of a timer can be read out in the timing where the timer counting is through by supplying the synchronized external input signal to the timer after the signal 5 is set at a high level in case a microcomputer is not set in a stand-by mode. Then the correct count value of the timer is read out.</p> |
