OLIMEX© 2015
A13-SOM user's manual
Note that signals PIN6/PWM0, PIN7, PIN8, PIN9 (respectively pins 36, 33, 34, 35) are also
available at the LCD_TR connector. Avoid multiplexing.
6.6 Jumper description
The board has a couple of hardware SMT jumpers which are used during the testing of the board.
It is not recommended to change the position of any jumpers located on A13-SOM.
Board jumpers
Jumper name
Type
Default position
Function
1.5V_E
SMT
CLOSED
If open disables 1.5V to the A13
1.2V_E
SMT
CLOSED
If open disables 1.2V to the A13
6.7 Additional hardware components
The components below are mounted on the A13-SOM but are not discussed above. They are listed
here for completeness:
Reset button –
used to reset the board
Power button –
used to reset the board
A13-SOM-256 has 256MB RAM = 1×[2Gb(128M x 16)] DDR3 SDRAM –
the exact memory
used in the board revision mentioned is Hynix 5TQ2G63BFR
A13-SOM-512 has 512MB RAM = 1×[4Gb(256M x 16b)] DDR3 SDRAM –
the exact memory
used currently in the board is SAMSUNG K4B4G1646D-BCK0
The DDR3 memory part name in the schematic might be outdated. We have used a number of
different but fully compatible DDR3 memories due to supply unavailability. It is always
recommended to check the exact memory name printed on the component itself.
LED1 – green – user-programmable LED, turns after a successful boot.
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