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<label product_type>PRODUCT_TYPE</label> TQMa7x - PTXdist Linux BSP documentation



USB devices cannot be recognized after resetting the USB Bus
Affects USB highspeed Host
Issue USB devices cannot be recognized after using command usb reset or usb stop
Effect USB devices cannot be recognized after using command usb reset or usb stop
Solution / Workaround TDB



'USB does not work with TQMa7S with MBa7x
Affects USB highspeed Host
Issue USB highspeed Host does not work with TQMa7S
Effect USB highspeed Host does not work with TQMa7S
Solution / Workaround Will be fixed in the next BSP revision



RS485 bus block in half-duplex mode
Affects RS485 via UARTx on MBa57xx Revsion 01xx
Issue During AM57xx reset the UARTx.CTS# pin is low by default (CPU internal pull down)
Effect Using the AM57xx RS485 circuitry in a half-duplex slave device or half-duplex multi-master environment may block the RS485 bus during AM57xx reset.
The bus is released as soon as the UARTx.CTS# pin is properly configured by software (e.g. U-Boot, Linux, etc.)
Solution / Workaround Add a 10k pull up to the UARTx.CTS# signal on carrier board
This behaviour will be fixed with MBa57xx REV.02xx
  • Last modified: 2022/08/04 15:04