Functional Safety Errors

Versal ACAP Technical Reference Manual (AM011)

Document ID
AM011
Release Date
2022-04-26
Revision
1.4 English

A safety error occurs when logic or a memory cell changes state due to a physical anomaly. The system can detect these anomalies. When a safety error occurs, it is important to ensure that the system remains in a safe state. This can include any of a number of actions. Broadly, responses fall into two categories.

Correctable Error
A bit error is detected and corrected, usually by the hardware. The event is recorded and an interrupt is signaled.
Note: The typical response is for the platform loader and manager (PLM) to report the event to the system safety software so it can be monitored and analyzed.
Uncorrectable Error
An error that is detected but cannot be corrected. The event is recorded and an interrupt is signaled.
Note: The typical response is for the PLM to indicate that a system-level intervention is required, which might include a partial or complete system reset.