Pin Pull-up

Figure 1. I/O Pin Pull-up Resistor Current vs. Input Voltage (VCC = 5V)
Figure 2. I/O Pin Pull-up Resistor Current vs. Input Voltage (VCC = 2.7V)
Figure 3. Reset Pull-up Resistor Current vs. Reset Pin Voltage (VCC = 5V)
Figure 4. Reset Pull-up Resistor Current vs. Reset Pin Voltage (VCC = 2.7V)