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:
|
Symbol |
Min. |
Typ. |
Max. |
Unit |
---|---|---|---|---|---|
IO voltage range |
VCCIO |
0 |
- |
3.3 |
V |
Input high range |
VIH |
1.7 |
- |
3.3 |
V |
Input low range |
VIL |
-0.3 |
- |
0.8 |
V |
Input leakage current |
II |
- |
- |
- |
µA |
Output high range |
VOH |
- |
- |
3.15 |
V |
Output low range |
VOL |
- |
- |
0.2 |
V |
Output current high |
IOH |
- |
- |
8 |
mA |
Output current low |
IOL |
- |
- |
8 |
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
The following figures illustrate GPIO wiring examples.
Fig. 567: GPIO input
GPIO wiring as output
Fig. 568: GPIO output (1)
Fig. 569: GPIO output (2)