Intel® Cyclone® 10 LP Core Fabric and General Purpose I/Os Handbook

ID 683777
Date 2/15/2023
Document Table of Contents Error Detection Timing

When the error detection CRC feature is enabled through the Intel® Quartus® Prime software, the device automatically activates the CRC process upon entering user mode, after configuration and initialization is complete.

The CRC_ERROR pin remains low until the error detection circuitry has detected a corrupted bit in the previous CRC calculation. After the pin goes high, it remains high during the next CRC calculation. This pin does not log the previous CRC calculation. If the new CRC calculation does not contain any corrupted bits, the CRC_ERROR pin is driven low. The error detection runs until the device is reset.

The error detection circuitry is clocked by an internal configuration oscillator with a divisor that sets the maximum frequency. The CRC calculation time depends on the device and the error detection clock frequency.