Embedded module en tqma7x TQMa7x arm Linux Linux ptxdist PTXdist \\ \\ ===== Known Issues ===== ===== U-Boot BSP Rev.0105 ====== ==== U-Boot ==== ^ 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 | \\ ---- ===== Linux BSP Rev.0101 ====== ==== U-Boot and Linux ==== ^ '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 | \\ ---- ===== MBa7x ====== ==== RS485 ==== ^ RS485 bus block in half-duplex mode ^^ ^ Affects | RS485 via UARTx | ^ Issue | During i.MX7 reset the UARTx.CTS# pin is low by default (CPU internal pull down) | ^ Effect | Using the MBa7x RS485 circuitry in a half-duplex slave device or half-duplex multi-master environment may block the RS485 bus during i.MX7 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 |