Amir Salama

Input Capture maximum frequency measurements

Discussion created by Amir Salama on Dec 3, 2019
Latest reply on Dec 17, 2019 by Daniel Martynek
I am working on NXP S32K1xx ICU module and i faced a critical issue, at Dual Edge mode as the maximum frequency could be measured is around 100 ~ 120 kHz (regarding to using filter or FTM prescaler) after that the interrupt doesn't come (with 1 prescaler 48MHz timer clock), but with single channel mode (both edges) i can measure till 20 KHz (good accuracy till 10kHz) and after that i can not sense the IO pin to know if the edge which fired the interrupt is rising or failing (CHIS bit).