21
ENG
ENGLISH
MAKING CONNECTIONS
Speaker Output Setup
(Depending on model)
EXTERNAL
SPEAKER OUT
VOLUME
CONTROL
+
-
UP
DOWN
Control port for Speaker out
RIGHT
LEFT
GND
GND
NOTE
y
Use only with the 3 Pole 3.5mm Stereo
Jack.
y
Do not connect your headphones or
earphones to the port for connecting an
external speaker.
Method of Volume control port
y
Cable Spec.
GND / Up / Down
Each Up /
Down pin is
pulled to 3.3V
with CPU
GPIO.
CPU detects
transition from
3.3V to GND
level for volume
control.
