OLIMEX© 2015
A13-SOM user's manual
CHAPTER 6: CONNECTORS AND PINOUT
6. Introduction to the chapter
In this chapter are presented the connectors that can be found on the board all together with their
pinout and notes about them. Jumpers functions are described. Notes and info on specific
peripherals are presented. Notes regarding the interfaces are given.
6.1 Communication with A13-SOM
There is only one way to communicate with A13-SOM without hardware modifications – it is via a
serial cable. If A13-SOM-WIFI is also used, you might also interface the setup via a display or via
SSH.
The direct communication method is via the serial interface. Through male UART1 connector
capable of delivering some information on the COM port of your computer – and then use your
favorite terminal program (puTTy, teraterm, etc) to receive the data/send commands. You can use
USB-SERIAL-CABLE-F with the UART1 interface allowing you to connect to a personal
computer with a free USB port.
Note that the levels at board's UART1 are in CMOS levels (3.3V) and you would need a MAX232
convertor to bring them to TTL ones! This includes the RX and TX line.
It is highly recommended to have an USB-SERIAL-CABLE-F (or similar product) even if you
intend to use the board with a monitor or display. Serial cables usually have built-in MAX232
convertor. In case you set wrong display settings you would be able to recover the settings via the
UART1 connection.
For more information please refer to chapter “2.5 Interacting with the board”.
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