2395171_en-US

FRDM-i.MX95 Board Not Booting from SD Card or Entering USB Serial Downloader Mode

Issue Summary

Flashed the provided base image to the microSD card using Win32DiskImager.
Set SW1 = 11 for SD card boot.
Connected the board to the PC using one USB-C cable, first through J1 (Debug UART) and later through J3 (USB Device) for USB download testing. The board is powered through J25.
The board powers on successfully (power LED is ON).

SD Boot Mode

Connected J1 to the PC.
Opened PuTTY at 115200, 8N1, No Flow Control.
Tried all detected COM ports (COM3, COM4, COM5, COM6).
Pressed RESET and power-cycled the board multiple times.
No boot logs or serial output are displayed.

USB Serial Downloader Mode

Changed SW1 = 01 for USB Serial Downloader mode.
Disconnected J1 and connected J3 to the PC.
Windows detects an Unknown USB Device (Device Descriptor Request Failed) with Code 43.
uuu.exe -lsusb does not detect the board.

Can anyone please help. FRDM-IMX95 #NXP iMX95

Re: FRDM-i.MX95 Board Not Booting from SD Card or Entering USB Serial Downloader Mode

Hi @shuru_2604

Your computer does not appear to have successfully updated its USB driver automatically. You can click the following link to download the CH344 driver and install it yourself.

https://file.wch.cn/download/file?id=312https://www.wch.cn/downloads/CH343CDC_ZIP.html

B.R