| 摘要 |
<p>PROBLEM TO BE SOLVED: To accurately determine the real operating time of a semiconductor device from real operating frequency. SOLUTION: The semiconductor device has a non-volatile memory (A) 4, on which information regarding operating frequency is recorded, a volatile memory (B) 5, on which information regarding operating frequency is rewritten, and a control means 6 transmitting information regarding operating frequency recorded on the memory (A) 4 to the memory (B) 5, rewriting the information on the memory (B) 5 and resetting it to the memory (A) 4.</p> |
