Computing methods are described below. Please calculate for your device using its specifications.
(1) Pull-Up Resistance
When Vcc is 5 V and IIL of port PXx in pull-up is the value indicated in the following table, the built-in pull-up resistance value is obtained using Ohm's Law as shown below.
Therefore, the built-in pull-up resistance values for this device are max. 250kΩ, standard 83.3kΩ and min. 41.7kΩ.
|IIL||"L" input current PXx |
(2) Pull-Down Resistance
When Vcc is 5V and IIH of port in pull-down is the value indicated in the following table, the built-in pull-down resistance value is obtained using Ohm's Law as shown below.
Therefore, this built-in pull-down resistance values for this device are max.
166.7kΩ, standard 71.4kΩ and min. 35.7kΩ.
|IIH||"H" input current PXx |