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TMS570LS1227: NHET external rising edge Interrupt latency

Part Number: TMS570LS1227

Hi Team,

how long is the NHET external rising edge Interrupt latency? I didn't find the spec talking about this.

my customer are using GPIO toggle to measure the Interrupt latency and found it have about 2 us latency.  that is when enter in the ISR, then toggle the GPIO,then measure the waveform between the external event and the gipo toggle event.