| 摘要 |
<p>PURPOSE:To secure the even action timing among circuits by stopping a reference clock for a prescribed period to the corresponding circuit constitution part when the deviation of the action timing is detected among the circuit constitution parts. CONSTITUTION:A clock pulse 21 is applied to a clock inhibiting circuit 41 and also to NAND circuits 43 and 44 via an inverter 42 respectively. While a clock pulse 22 is applied to the circuit 41. The circuit 41 incorporates a control means to supply the status signals 25a and 25b showing the working state of a CPU as well as the status signals 26a and 26b showing the working state of a DMAC 15. Thus the control means monitors the deviation of the action timing between the CPU and the DMAC. If the deviation of the action timing is detected, a reference clock is stopped for one period to the corresponding device.</p> |
