Can we connect external ADC/DAC(analog to digital & digital to analog converter) to ORIN AGX

Robotics & Edge Computing Jetson & Embedded Systems Jetson AGX Orin
1

I am trying to connect an external ADC/DAC (PCF8591 ADC/DAC) through pins shown in the “Jetson AGX Orin Developer Kit User Guide - Hardware | NVIDIA Developer”
but the orin wouldn’t recognize or read the adc/dac while I’m using I2C buses for the connections.

I’m using the following connections:

Connecting the known I2C device to the Jetson Orin:

  • SDA pin to the SDA pin on the Jetson (e.g., Pin 3 - I2C5_DAT).
  • SCL pin to the SCL pin on the Jetson (e.g., Pin 5 - I2C5_CLK).
  • GND pin to a ground pin on the Jetson.
  • VCC pin to a suitable power source (3.3V or 5V depending on the device).

but the orin cant read the address when I’m connecting the following pins to the adc/dac module.

i need help with the connections and idk if the external adc/dac is compatible with the orin !!

i tried running various commands like:
i2cdetect - ran on all the available busses but couldn’t find the device address on any bus

can anyone please help me with this!

4

Maybe probe the i2c signal to confirm if device ack for the I2C broadcasting command.

5

thanks for the reply, i was just using wrong bus found the solution in some website that i2c pin 3 and 5 are connected to bus 7

6

the command tht i used is i2cdetect -y -a busnumber and found the adc register 48 on the bus 7

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