OLIMEX© 2017
A20-OLinuXino-LIME2 user's manual
6.11 Jumper description
Please note that most the jumpers on the board are SMT type. If you feel insecure of your
soldering/cutting technique it is better not to try to adjust the jumpers since it is possible to damage the
board.
Board jumpers
Jumper name
Type
Default position
Function
NAND_E
SMT
Either CLOSED or
OPEN, depending
whether the board
has 4GB NAND MEMORY
MODULE
Controls whether the NAND memory
module is enabled or disabled.
If the jumper is closed than the NAND
memory is operational.
PC3/PB8
SMT
PC3
Controls which processor pin should
be used for SATA power enabling
signal. By default the SATA powering
control uses processor pin L22 which
is port PC3.
Changing this jumper also changes the
availability of PC3 and PB8 at GPIO-1
pin 29 and GPIO-3 pin 16.
Please note that if you change the
position of the jumper from PC3 to
PB8 then you might block one of the
processor pins responsible for I2S
and AC97 audio output.
PB9/PH7_USB
SMT
PB9
Controls which processor pin should
be used for the USB_OTG. By default
the USB_OTG uses processor pin C12
which is port PB9. The same pin/port
is used for I2S audio. In case you
want to access the I2S capabilities
of the board you would need to change
the default position.
PB9/PH7_GPIO
SMT
PH7_GPIO
PB9/PH7_GPIO jumper controls which of
the two ports (PB9 or PH7) should be
lead out to pin 9 of GPIO3 connector
for easier access.
Changing this jumper also changes the
signal available at GPIO-3
connector's pin 9.
By default this jumper is in PH7_GPIO
position and PH7 is lead to pin 9 of
GPIO3.
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