| 摘要 |
<p>PROBLEM TO BE SOLVED: To improve the flexibility of a processor by restoring a desired mode after the end of an exceptional processing routine by deciding whether or not a clock stopping instruction is executed when exceptional processing is generated. SOLUTION: At the time of executing a clock stop instruction, a clock stop controlling part 12 sets 1 in an F/F 13, and stops the supply of a clock CLK to a processor core 11. When an exception detection processing part 16 detects the generation of exceptional processing, a clock stop controlling part 12 copies the 1 of the F/F 13 to an F/F 14, and sets 0 in the F/F 13, and supplies the clock CLK to the processor core 11. The processor core 11 checks the value of the F/F 14, and when the value is 1, the processor core 11 decides that the clock stop state is obtained when the exceptional processing is generated, and executes the clock stop instruction for restoring the clock stop state after the exceptional processing is ended.</p> |
