36.2.1 GPIO Input Characteristics Figure 36-16. I/O Pin Input Hysteresis vs. VDD Figure 36-17. I/O Pin Input Threshold Voltage vs. VDD (T = 25°C) Figure 36-18. I/O Pin Input Threshold Voltage vs. VDD (VIH) Figure 36-19. I/O Pin Input Threshold Voltage vs. VDD (VIL)