Jetson AGX Xavier Test 40 pin header on Jetpack4.5

[edward1_lin]

Hi Trumany,

I have another question, I saw the P2822 schematic, the UART1_CTS is conneting on the level shift, when it is input pin, it can change the value by VCC/GND.

What is the different between pin11 and pin36??

[Trumany]

Pin 36 is set to input only by same level shift.

[edward1_lin]

Hi Trumany,

I set the Pin 36 to input, but Pin 36 couold be changed its value by VCC/GND

This is my step:

1. sudo su
2. cd /sys/class/gpio
3. echo 429 > export
4. cd gpio429
5. cat direction
6. echo in > direction
7. connect pin36 to 3.3V
8. cat value
9. connect pin36 to GND
10. cat value

[Trumany]

I dont get what you mean… pin 36 can be as input only, do you mean you can’t get the correct value on it by connecting it to high or low?

[edward1_lin]

Hi Trumany,

I am sorry that I got a mistake, so Pin11 only can be output and Pin36 only can be the input, Do I have the ability to modify the state? If Yes, how to change?

[Trumany]

No, you can’t change that on devkit as there is a level shift that limit pins direction.