Parallella UART Connection

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The UART can be used to provide access to a hardware console and is particularly useful when Parallella is being used "headless".

Header and signal levels

The UART 3-pin header (J2) provides Transmit (Tx), Receive (Rx) and Ground (Gnd). It is located in the corner near the Ethernet port.

0v and 3.3v logic level are used.

Connection to another host

Cabling depends on the interface/adapter, but the port is DTE and when connected to another host or a something such as a USB to serial adapter, it will almost certainly have to be crossover/null-modem wired. I.e.:

  • Ground to Ground
  • Tx to Rx
  • Rx to Tx

The default port parameters are:

  • 115,200 bits per second
  • eight data bits, no parity, one stop bit (8N1).