USB Voltage Level for Verdin IMX8M-Mini

Technical Support
1

What is the voltage level for the Verdin IMX8M-Mini USB ports?

2

Hi @cwea

I’m not sure if I understood your question correctly.
The USB ports are on the carrier board.

Do you want to use the USB-C port to power your device and want to know the power supply voltage?
Which carrier board are you using?

Or do you want to use the USB-A port on the carrier board to power a peripheral?
The output should be 5V.

3

Hi Allan,

Apologies for the vague question. I mean specifically the USB_2_D_N/P pins on the Verdin IMX8M-Mini module. I am designing my own carrier board.

For USB 2.0, my understanding is that the positive and negative thresholds are 0-400mV for HS and ~0-3.3V for FS operation. At FS, will the IMX8M-Mini levels be 0-3.3V or 1.8V?

Thanks,
Calviin

4

The USB_2_D_N/P pins on the Verdin iMX8M-Mini module are routed directly to the corresponding balls on the iMX8M-Mini SoC. They are 5V tolerant and comply with the Universal Serial Bus Specification, Revision 2.0.

The USB transmitter block contains drivers for all three speed modes in the USB protocol:

  • High-Speed (HS): 480 Mbps
  • Full-Speed (FS): 12 Mbps
  • Low-Speed (LS): 1.5 Mbps

This block also includes:

  • Automatically tuned 45Ω resistors for setting HS input and output impedance
  • 1.5kΩ D+ device pull-up resistor for FS operation
  • 15kΩ D+ and D– host pull-down resistors for FS and LS operations

For additional details, please refer to the iMX8M-Mini SoC documentation.

5

Thanks, alex.tx. That answers my question!