Timeout error when flashing IMX8Mplus using UUU

[Talal]

I built a custom board and used IMX8M plus processor. When the firmware team tried to upload the prebuilt image of the EVK dev board using UUU they encounter this issue:

Fail HID(W):LIBUSB_ERROR_TIMEOUT(1s)

There are a few differences between the custom board design and the EVK dev board, and the differences are:

1/ To upload the image I connected the Micro-b USB 2.0 directly to USB1 of IMX8M plus, whilst in the dev board the USB is connected to USB-to-Serial IC and then connected two UART signals to UART 2 and 4 of IMX8M plus

2/ DRAM:

We used 2GB LPDDR4 PN:MT53D512M32D2DS-053 AAT:D

Dev Board 6GB LPPDR4 PN:MT53E1536M32D4DT-046 WT:A

3/ Same PMIC

4/eMMC:

We used 8GB eMMC 5.1 PN:SDINBDG4-8G-XA

Dev Board 32GB eMMC5.1 PN:SDINBDG4-32G-I1

Any idea what seems to be the problem?

[Rita_Wang]

Here maybe caused by the usb, for the usb USB 2.0 design you need to see the

https://community.nxp.com/t5/i-MX-Processors-Knowledge-Base/i-MX8MM-i-MX8MQ-USB2-0-Design-Without-US...

To see if this section will be OK.

For the DDR you also need to configure proper parameters.