原创 FPGA配置过程的一点笔记

楼主，看到这个有点晚了，现在碰见的问题是上电后nSTATUS一拉高，高电平持续40ms左右就又变低了，此时auto_restart configuration after errors没有使能，当使能时，nSTATUS是低电平持续20us，高电平持续72ms的脉冲，手册上If an error occurs during configuration, the Cyclone II device drives the nSTATUSsignal low to indicate a data frame error, and the CONF_DONE signal stays low. If you enable the Auto-restart configuration after error option in the Quartus II software from the Generaltab of the Device & Pin Optionsdialog box, the Cyclone II device resets the serial configuration device by pulsing nCSO, releases nSTATUSafter a reset time-out period (about 40 μs), and retries configuration. If the Auto-restart configuration after erroroption is turned off, the external system must monitor nSTATUSfor errors and then pull nCONFIGlow for at least 2 μs to restart configuration. 这说明data出错了，可为什么as模式烧进去是成功的，电路硬件也检查好几遍了，引脚连接没有问题啊，求教啊！！！！

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