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PYu2's avatar
PYu2
Icon for New Contributor rankNew Contributor
6 years ago

关于Cyclone10LP CRC_ERROR报错问题

客户使用10CL016YUU256I7G，需要CRC_ERROR报错功能，现在出现想象是CRC_ERROR​在配置过程一直为高 ，一直到CONF_DONE拉高后400us左右时间，才拉低。由于使用CRC校验功能，FPGA输出使FPGA重新配置，出现循环状态。FPGA无法正常工作，现在解决办法是通过LC滤波将CRC_ERROR去除，不输出，这样FPGA可以正常工作。Active high sign...
JohnT_Altera's avatar
JohnT_Altera
Icon for Regular Contributor rankRegular Contributor
6 years ago

Hi,

Sorry for the confusion on the CRC_ERROR pin. The CRC_ERROR pin is an optional pin where when it is disable then it will be tri-state with weak-pull up. During configuration, if there is any CRC error then the configuration will failed and nStatus will be triggered. The CRC_ERROR pin will only be used to monitor the SEU during usermode. The pin cannot be used during configuration.

The device will need at least 3192 clock cycle for it to enter usermode.