Datasheet

Page 6
Jumpers
SmartMP3™ also contains several jumpers
which provide you with options below:
This jumper is used to select whether
3.3V or 5V voltage level will be used (3.3V
position by default). In case that Easy
development board uses 5V power supply,
it is necessary to place jumper J1 in 5V
position. Otherwise, jumper J1 should be
left in its default position (3.3V).
These jumpers are used to select
whether microphone or LINE input
will be used (MIC position by default).
In case that you want to use 3.5mm
stereo audio connector as LINE input, it
is necessary to place jumpers in LINE IN
position. Otherwise if you want to use it as
microphone input, jumpers should be left in
its default position (MIC).
These jumpers are used to select
whether built-in speaker (ON) or
headphones output (OFF) will be used
(ON position by default). In case that you
want to use 3.5mm stereo audio connector
as headphones output, it is necessary to
place jumpers in OFF position. Otherwise
if you want to use built-in speaker, jumpers
should be left in its default position (ON).
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