35.2.7 Pin Pull-Up Figure 35-63. ATmega168PB: I/O Pin Pull-up Resistor Current vs. Input Voltage (VCC = 1.8V) Figure 35-64. ATmega168PB: I/O Pin Pull-up Resistor Current vs. Input Voltage (VCC = 2.7V) Figure 35-65. ATmega168PB: I/O Pin Pull-up Resistor Current vs. Input Voltage (VCC = 5V) Figure 35-66. ATmega168PB: Reset Pull-up Resistor Current vs. Reset Pin Voltage (VCC = 1.8V) Figure 35-67. ATmega168PB: Reset Pull-up Resistor Current vs. Reset Pin Voltage (VCC = 2.7V) Figure 35-68. ATmega168PB: Reset Pull-up Resistor Current vs. Reset Pin Voltage (VCC = 5V)