| 摘要 |
<p>PURPOSE:To reduce furthermore the power consumption of the microprocessor using the complementary metal oxide semiconductor CMOS, by switching the internal clock velocity within the microprocessor between the high and low speeds. CONSTITUTION:Fixed memory unit ROM program region is divided into region 1 requiring no high-speed process and region 2 requiring the high-speed process each for programming. When the process jumps from region 1 to 2, bit B is supplied through input terminal 14. Thus the basic clock of the external clock is selected to terminal 11 to perform the high-speed process. In case the jump is given from region 2 to 1, the low-speed clock in which the basic clock is divided is selected to terminal 11 to perform the low-speed process.</p> |
