SPRUJ17I March 2022 – August 2025 AM2631 , AM2631-Q1 , AM2632 , AM2632-Q1 , AM2634 , AM2634-Q1
The ESM can have up to 78 error event inputs, configurable by groups of 32. Error event inputs can be either level (default) or pulse. This device is configured with 2 level group events and 1 pulse group events.
Level error events (active high) are synchronized to the ESM clock. This synchronized value is captured in to a flop. Pulse error events use rising edge detection. Each Pulse Error Event has 3 redundant inputs. Each input has its own edge detection circuit. Multiple transmission protects against Single Event Upsets (SEUs, transient errors) causing a pulse to be lost during transmission and against failure of the edge detection circuit. Once an edge has been detected on any of the three inputs, the raw status is set. Subsequent pulses are likely to come concurrently or quickly enough that software will not have reacted yet. This circuit is intentionally biased against false negatives and towards false positives. An SEU that causes an event where none actually occurred will just cause software to be called in to action. Software will observe that there is no real error and clear the false status.