1.5.2 On-Demand Digest Check

The on-demand digest check recalculates and compares digests of selected non-volatile memories with the stored digests. A failure of any digest results in the tamper event being triggered. The on-demand digest check is invoked by calling digest check design system service. The status of the fabric digest check must be monitored by a state machine (for example, CoreABC IP core) implemented in the fabric. After checking the status of the fabric digest check, the state machine needs to issue a design reset or device reset depending on the design requirements. For more information about system services, see System Services chapter of UG0753: PolarFire FPGA Security User Guide.