35.2.9 Pin Threshold and Hysteresis Figure 35-73. ATmega168PB I/O Pin Input Threshold Voltage vs. VCC (VIH, I/O Pin read as ‘1’) Figure 35-74. ATmega168PB I/O Pin Input Threshold Voltage vs. VCC (VIL, I/O Pin read as ‘0’) Figure 35-75. ATmega168PB I/O Pin Input Hysteresis vs. VCC Figure 35-76. ATmega168PB Reset Input Threshold Voltage vs. VCC (VIH, I/O Pin read as ‘1’) Figure 35-77. ATmega168PB Reset Input Threshold Voltage vs. VCC (VIL, I/O Pin read as ‘0’) Figure 35-78. ATmega168PB Reset Pin Input Hysteresis vs. VCC