Do Cyclone II device user I/O pins have Schmitt triggers? - Do Cyclone II device user I/O pins have Schmitt triggers? Description No, the Cyclone® II device user I/O pins do not have a Schmitt trigger option. The JTAG and configuration pins that have Schmitt triggers are: TMS, TCK, TDI, nCONFIG, nCE, DATA0, nSTATUS, CONF_DONE and DCLK. The Schmitt trigger hysteresis varies with VCCIO. VCCIO=3.3V, hysteresis ~ 250mV VCCIO=2.5V, hysteresis ~ 200mV VCCIO=1.8V, hysteresis ~ 150mV VCCIO=1.5V, hysteresis ~ 120mV These are based on simulation data for reference only. Related Articles Do Altera device input buffers have built-in Schmitt triggers? Custom Fields values: ['novalue'] Troubleshooting novalue False ['novalue'] ['novalue'] novalue novalue ['Cyclone® II FPGAs'] ['novalue'] ['novalue'] ['novalue']