HPS GPIO Interface
The general-purpose I/O (GPIO) interface has debounce circuitry included to remove signal glitches. The debounce clock frequency ranges from 125 Hz to 32 kHz. The minimum pulse width is 1 debounce clock cycle and the minimum detectable GPIO pulse width is 62.5 µs (at 32 kHz).
If the external signal is driven into the GPIO for less than one clock cycle, the external signal is filtered. If the external signal is between one and two clock cycles, the external signal may or may not be filtered depending on the phase of the signal. If the external signal is more than two clock cycles, the external signal is not filtered.
Did you find the information on this page useful?