Cyclone® V Device Handbook: Volume 1: Device Interfaces and Integration

ID 683375
Date 10/18/2023
Document Table of Contents

8.2. Configuration Error Detection

When the Intel® Quartus® Prime software generates the configuration bitstream, the software also computes a 16-bit CRC value for each frame. A configuration bitstream can contain more than one CRC values depending on the number of data frames in the bitstream. The length of the data frame varies for each device.

When a data frame is loaded into the FPGA during configuration, the precomputed CRC value shifts into the CRC circuitry. At the same time, the CRC engine in the FPGA computes the CRC value for the data frame and compares it against the precomputed CRC value. If both CRC values do not match, the nSTATUS pin is set to low to indicate a configuration error.

You can test the capability of this feature by modifying the configuration bitstream or intentionally corrupting the bitstream during configuration.