AM2434: Does USB-MSC-Host boot support hubs?

Weijian Tang

Part Number: AM2434

Tool/software:

Hi Experts,

(1) On AM2434-EVM, I successfully booted the AM2434 using USB backup mode without a USB hub. The boot configuration is 11000010 01100100.

USB BOOT Backup Mode Selection

However, when an external USB hub is connected to AM2434-EVM, it fails to boot AM2434.

(2) In custom board, a USB-HUB chip was integrated. The AM2434 only boots successfully when this HUB chip is removed.

(3) I have received technical assistance from MCCI regarding the USB-MSC-Host software driver; however, the issue with USB-MSC-Host booting remains unresolved.

Is USB BOOT for AM243x compatible with hubs? I would appreciate any technical support from experts.

Best Regards,

Weijian

8 days ago

0 Tushar Thakur 7 days ago

TI__Mastermind 26153 points

Hi Weijian,

Thanks for your query.

Weijian Tang said:
Is USB BOOT for AM243x compatible with hubs? I would appreciate any technical support from experts.

The USB MSC host mode is not supported by our current MCU+SDK offering. Please reach out to MCCI for further help.

Please refer USB_DEVICE_DRIVER for supported/non-supported USB feature.

Regards,

Tushar

+1 Tony Tang 6 days ago in reply to Tushar Thakur

TI__Mastermind 26961 points

From this thread, BOOT ROM should not support USB-MSC boot over HUB:

https://e2e.ti.com/support/processors-group/processors/f/processors-forum/1391920/am625-usb-msc-boot-over-hub

Tushar Thakur

Can you help to double confirm with ROM code team?

0 Terrill Moore 6 days ago in reply to Tushar Thakur

Prodigy 30 points

As Tony mentions, MCCI's stack is not used in the TI boot ROM. We can run both device and host from a second stage boot loader if that's relevant, and that would give full hub support. Contact MCCI if you have a requirement.

Best regards,
--Terry / MCCI

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AM2434: Does USB-MSC-Host boot support hubs?