【应用笔记】理解Altera器件的I/O输出时序(Understanding I/O Output Timing for Altera Devices) 本应用笔记描述了Altera器件的输出时序参数，解释了Altera如何定义tCO，并为你的系统提出了计算输出时序的技巧。 This application note describes the output timing parameters for Altera® devices, explains how Altera defines tCO results, and presents techniques for calculating the output timing for your system. In addition, a sample DDR2 interface link is presented and analyzed for calculating output timing. Understanding I/O Output Timing for Altera Devices July 2006, ver. 1.0 Application Note 366 Introduction This application note describes the output timing parameters for Altera devices, explains how Altera defines tCO results, and presents techniques for calculating the output timing for your system. In addition, a sample DDR2 interface link is presented and analyzed for calculating output timing. Detailed timing information is available in the device handbooks and from the Quartus II soft……