AXEL Lite SOM/AXEL Lite Hardware/Peripherals/UART

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ID# Issue Date Notes


27/10/2020 New documentation layout

Peripheral UART[edit | edit source]

Universal Asynchronous Receiver/Transmitter (UART) provides serial communication capability with external devices through a level converter like RS-232 or RS-485.

Description[edit | edit source]

The UART interface available on AXEL Lite is based on i.MX6 SoC.

The UART ports support the following standards and features:

  • One of the five UARTs (UART1) supports 8-wire while others four supports 4-wire
  • High-speed TIA/EIA-232-F compatible, up to 4.0 Mbit/s
  • Serial IR interface low-speed, IrDA-compatible (up to 115.2 Kbit/s)
  • 9-bit or Multidrop mode (RS-485) support (automatic slave address detection)
  • 7 or 8 data bits for RS-232 characters, or 9 bit RS-485 format
  • 1 or 2 stop bits
  • Programmable parity (even, odd, and no parity)
  • Hardware flow control support for request to send (RTS_B) and clear to send (CTS_B) signals
  • RS-485 driver direction control via CTS_B signal
  • Auto baud rate detection (up to 115.2 Kbit/s)
  • Two independent, 32-entry FIFOs for transmit and receive

Pin mapping[edit | edit source]

The Pin mapping is described in the Pinout table section