时钟到输出延时 时钟到输出延时：从时钟信号有效沿到数据有效的时间间隔。 tCO = Clock Delay + MicrotCO + Data Delay tCO (Clock to output delay) : The maximum time required to obtain a valid output at an output pin that is fed by a register after a clock signal transition on an input pin that clocks the register. This time always represents an external pin-to-pin delay. tCO = + + tCO slack = -