Visible to Intel only — GUID: dqb1673368191217
Ixiasoft
Visible to Intel only — GUID: dqb1673368191217
Ixiasoft
5.14.5.2. Debounce Operation
The GPIO modules provided in the HPS include optional debounce capabilities. The external signal can be debounced to remove any spurious glitches that are less than one period of the external debouncing clock, gpio_db_clk.
When input signals are debounced using the gpio_db_clk debounce clock, the signals must be active for a minimum of two cycles of the debounce clock to guarantee that they are registered. Any input pulse widths less than a debounce clock period are filtered out. If the input signal pulse width is between one and two debounce clock widths, it may or may not be filtered out, depending on its phase relationship to the debounce clock. If the input pulse spans two rising edges of the debounce clock, it is registered. If it spans only one rising edge, it is not registered.