Infineon ERU Interrupt 1 Manual page 3

Introduction
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The External Request Unit (ERU) is a versatile event and pattern
detection unit.
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Its main task is the generation of interrupts based on selectable
trigger events at different inputs, e.g. to generate external interrupt
requests if an edge occurs at an input pin.
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The detected events can also be used by other modules to trigger or to
gate module specific actions.
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