最近开始看fpga的datasheet,原文中有“The DLL seeks to align the rising-edge of feedback signal at the CLKFB input with the rising-edge of CLKIN input” 和 "Once the DLL has brought the CLK0 signal in phase with the CLKIN signal..."
前一句是说dll是为了对齐clkfb和clkin;后一句说clk0和clkin相位对齐。dll的作用到底是什么sa????时钟对齐的目的何在???