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    • 4. 发明授权
    • Clock control system and clock control method
    • 时钟控制系统和时钟控制方式
    • US07340624B2
    • 2008-03-04
    • US10716479
    • 2003-11-20
    • Hiroshi Kurakane
    • Hiroshi Kurakane
    • G06F1/00
    • G06F1/3218G06F1/08G06F1/3203G06F1/324H03L7/18Y02D10/126Y02D50/20
    • This invention relates to a clock control system including a CPU, a peripheral functional block for the CPU, a frequency multiplication circuit which multiplies the frequency of an input system clock and outputs the multiplied system clock, a plurality of frequency division circuits which divide the frequency of a signal output from the frequency multiplication circuit to generate clocks to be supplied to the CPU and peripheral functional block, and a clock controller which changes the frequency multiplication ratio of the frequency multiplication circuit to 1/N (positive integer) and then changes the frequency division ratio of the frequency division circuit arranged on the input stage of the peripheral functional block to 1/N in order to set the CPU to a low-power consumption mode, and a method of controlling the clock control system.
    • 本发明涉及一种时钟控制系统,包括CPU,用于CPU的外围功能块,乘法电路,其将输入系统时钟的频率相乘并输出相乘的系统时钟;多个分频电路,其将频率 从频率倍增电路输出的信号,生成要提供给CPU和外围功能块的时钟;以及时钟控制器,其将倍频电路的倍频比改变为1 / N(正整数),然后将 为了将CPU设置为低功耗模式,配置在周边功能块的输入级上的分频电路的分频比为1 / N,以及控制时钟控制系统的方法。