| 摘要 |
<p>PURPOSE:To optionally specify the waiting time by starting counting operation from an initial value by a counter as soon as the reset release is requested to a CPU, specifying the address of a program memory and permitting the execution of the reset release command when the CPU is in reset condition. CONSTITUTION:The count value of the program counter instructs the address storing a return time setting command WAKE of a program memory 10, then the command WAKE is executed by an instruction decoder 11. A reset circuit 12 makes a reset signal having been outputted fall to release the reset state of the CPU 1. By the fall of the reset signal, a program counter 9 is reset and starts counting from the initial value again. Thus, the restriction of execution permission for only the command WAKE which is performed for the decoder 11 is released. Thus, the waiting time of an oscillation circuit 5 can be arbitrarily set by changing the address of the memory 10 to which the command WAKE is to be written.</p> |
