GPIO specifications

The two GPIOs (general purpose I/O) can be used as inputs or outputs. This selection is made by software using the corresponding SDK API functions. Please observe the following criteria:

•Input: 3.3 V, max. 5.0 V input voltage

•Output: 3.3 V, max. 4.0 mA

NOTICE! The General Purpose I/Os are not potential-free and have no protective circuit. Faulty wiring (overvoltage, undervoltage) can result in a damage in the electronics.

GPIO wiring as input

The following figures illustrate GPIO wiring examples.

Fig. 537: GPIO input

Fig. 538: GPIO output (1)

Fig. 539: GPIO output (2)