I can not find the answer to simple questions.
Logical levels of UART VIM2.
Maximum current on GPIO (1.8v, 3.3v, 5v)
Is this some kind of secret knowledge available only to manufacturers?
This is https://docs.khadas.com/vim2/GPIOPinout.html#Pinout-map-V12
Not a pinout map.
This is a hat!
You can refer to our docs How To Access GPIO.
Please tell me where exactly on the page you indicated, is there an explanation about the voltage of the logical levels of UART and the maximum current on pins 1.8v, 3.3v, 5v?
It’s 3.3V level.
@Totti please follow up this.
The logical level of UART is 3.3V/0V(high and low);
The maximum current on GPIO of 1.8V from the power supply chip is 500mA,but you can only use 100 mA at most;
The maximum current on GPIO of 3.3V from the power supply chip is 2A,but you can only use 500 mA at most;
The maximum current on GPIO of 5V from the power supply chip is 3A,but you can only use 500 mA at most;
These are theoretical values,the maximum current on GPIO of then may based on your actual use of the board.
If you want to learn more, you can download the VIM2 Schematic as