fclk频率是什么 本文已影响 1.9W人 FCLK为Cpu核供给时钟信号,1/Fclk即为cpu时钟周期。HCLK为AHB bus peripherals供给时钟信号,AHB为advanced high-performance bus。PCLK为APB bus peripherals供给时钟信号,APB为advanced peripherals bus