Microsd Card Connector - OLIMEX AM3352-SOM User Manual

OLIMEX© 2015
The UART0 header can also be used to power a stand-alone AM3352-SOM. This is the
recommended way of powering a standalone AM3352 board. The voltage input pin (+) is named
"+5V" and it is suitable for 5V DC external power supply unit. One of the two GND pins can be
used as ground (-). The required current may vary depending on the peripherals connected to the
board. The power supply should be capable of providing at least 2.5W. For the powering, we are
only interested in the +5V (+) pin and the GND (-) pin.
The signal names are printed near the pins, make sure to inspect the names before connecting the
supply.
More info about the power supply can be found in chapter 5 of this manual.
Pin # Printed name
1 TX
2 RX
3 GND
4 GND
5 +5V

6.3 MicroSD card connector

The micro SD card slot is primarily used for booting the operating system.
The board works with micro SDHC cards up to 32GB of storage. Note that the speed class rating of
the card used affect the performance of the operating system. Higher speed class class rating is
better.
As a general precaution be careful with the SD cards you purchase. There is a big percentage of
fake cards due to the low effort required to counterfeit popular brands and the big demand for SD
cards worldwide. When in doubt – try the same operation with another card from another brand.
Olimex sells microSD cards with Linux that have been tested – please refer to chapter "3.2
Requirements". Of course, if you already have a large enough microSD card you can download the
official Linux image from the wiki pages: https://www.olimex.com/wiki/AM3352-SOM.
When removing the card, please make sure that you release it from the connector by pushing and
NOT by pulling the card directly (this can damage both the connector and the microSD card).
UART0
Signal name
P1_11/UART0_TX
P1_10/UART0_RX
GND
GND
+5V
Page 22 of 36
AM3352-SOM user's manual
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