【应用手册】Achieving Timing Closure in Basic (PMA Direct) Functional Mode This application note describes the method to achieve timing closure for designs that use transceivers in Basic (PMA Direct) mode in Altera’s Stratix® IV GX or Stratix IV GT FPGAs. It also describes best practices for the Quartus® II software version 9.1 SP1 and earlier and best practices for the Quartus II software version 9.1 SP2 and later. This application note describes techniques for resolving timing violations for paths between the transceiver and the FPGA core only. You must follow general best practices for timing closure in FPGA designs to resolve any timing violations that exist in the FPGA core. Achieving Timing Closure in Basic (PMA Direct) Functional Mode AN-580-3.0 Application Note This application note describes the method to achieve timing closure for designs that use transceivers in Basic (PMA Direct) mode in Altera’s Stratix IV GX or Stratix IV GT FPGAs. It also describes best practices for ……