很菜鸟，网上没查到。TCLK和HCLK

没弄明白两个词！<br />TCLK是Timer&nbsp;Clock，在datasheet中，它一般可以表示从振荡器那里得到的时钟？<br />而HCLK是各个controller的输入时钟，HCLK是TCLK经过一些分频或其他操作得到的？<br /><br />哪位帮我解答下呢！3ks<br />

您可以参考“Clock&nbsp;Generator&nbsp;Block&nbsp;Diagram”，外部输入时钟经PLL倍频，分频得到&nbsp;FCLK:HCLK:PCLK．<br /><br />FCLK&nbsp;is&nbsp;used&nbsp;by&nbsp;ARM920T.<br />HCLK&nbsp;is&nbsp;used&nbsp;for&nbsp;AHB&nbsp;bus,&nbsp;which&nbsp;is&nbsp;used&nbsp;by&nbsp;the&nbsp;ARM920T,&nbsp;the&nbsp;memory&nbsp;controller,&nbsp;the&nbsp;interrupt&nbsp;controller,&nbsp;the<br />LCD&nbsp;controller,&nbsp;the&nbsp;DMA&nbsp;and&nbsp;USB&nbsp;host&nbsp;block.<br />PCLK&nbsp;is&nbsp;used&nbsp;for&nbsp;APB&nbsp;bus,&nbsp;which&nbsp;is&nbsp;used&nbsp;by&nbsp;the&nbsp;peripherals&nbsp;such&nbsp;as&nbsp;WDT,&nbsp;IIS,&nbsp;I2C,&nbsp;PWM&nbsp;timer,&nbsp;MMC&nbsp;interface,<br />ADC,&nbsp;UART,&nbsp;GPIO,&nbsp;RTC&nbsp;and&nbsp;SPI.<br /><br />TCLK是由外围时钟（PCLK）分频得到的，作为定时器的记数时钟，说白了就是当TCLK震荡一次，定时器的计数值就递增１