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OLIMEX© 2015
AM3352-SOM user's manual
3.3 Powering the board
The powering requirements of the AM3352-SOM are different depending on whether you use it in
stand-alone mode or mounted atop AM3352-SOM-EVB. The sub-chapters below deal with both
scenarios.
3.3.1 Stand-alone powering
If you use the board in stand-alone mode (e.g. it is neither attached to AM3352-SOM-EVB nor to
any other board of peripherals) there are fewer options for powering it. Consider that you might
need additional cables or connectors. You have the following options of powering the board:
1. provide +5V DC voltage to pin "+5V" at the UART0 header; connect ground to pin "GND" of
the same header
2. provide +5V DC voltage to pin 1 and GND to pin 2 of any of the following headers – AM_CON-
LCD header; AM_CON-GPIO1; AM_CON-GPIO2; AM_CON-GPIO3. IMPORTANT – provide
power supply to only one of the mentioned pins, providing 5V to more than one header
simultaneously would lead to over-voltage!
The default way of powering the board is using external power supply. In that case you would need
to provide +5V DC to the "+5V" pin of the UART0 (DEBUG) connector. You would also need to
connect the GND line of you supply to one of the GND pins of the same connector. The minimum
power that your supply should be able to prove is 2.5W (equivalent of 0.5A of current at 5V of
voltage). Note that there is no standard jack for the powering circuit but you might add own DC
power jack.
Do not provide AC voltage to the AM3352-SOM board! Do not provide more than 5V of voltage
directly to the AM3352-SOM board! Providing 12V would instantly cause permanent hardware
damage!
Page 12 of 36
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