OLIMEX© 2012
A13-OLinuXino user's manual
6.8 Jumper description
Please note that all the jumpers on the board are SMD type. If you feel insecure of your
soldering/cutting technique it is better not to try to adjust the jumpers. The only really important
jumper on the board is CE_NAND_E, which needs to be closed if you have board variant with
NAND flash memory but you wish to boot OS from SD card.
6.8.1 CE_NAND_E
When cut this board disconnects the NAND flash. Note that it is not a requirement to boot from the
SD card since the processor has a routine of detecting such.
The default position is closed.
6.8.2 3.3V_OPTION, 1.5V_E
Both jumpers provide a test pad during production and debugging checking the supply voltages. It
is not recommended to change their default positions.
The default positions are closed.
6.8.3 5V_E
The jumper provide a test pad during production and debugging checking the supply voltages. It is
not recommended to change its default position. It is also useful if you remove the whole battery
part of the board.
The default position is open.
6.8.4 HOST_EN, 5V_E_WIFI, WIFI-3.3V/5V_USB
These jumper provide options to setup the WIFI module to work on 3.3V, and/or the USB host to
work on 3.3V. It is strongly not recommended to change the default positions, since then they will
be directly powered from source which might cause faults of USB devices when disconnecting
them from the hub.
Default positions are:
HOST_EN – open;
5V_E_WIFI – open;
WIFI-3.3V/5V_USB in 5V_USB position.
6.9 Additional hardware components
The components below are mounted on OLinuXino but are not discussed above. They are listed
here for completeness:
Page 28 of 37
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