Hardware manual

2.7 Volume
It can output variable voltage (0V-IO voltage) to A/D terminal of CPU by variable resistor of 10KΩ.
JP38 VR2
JP38
ADCA0I0 1-2
ADCA0I1 3-4
ADCA0I2 5-6
ADCA0I3 7-8
ADCA0I4 9-10
ADCA0I5 11-12
P10_6/ADCA0I6 13-14
P10_7/ADCA0I7 15-16
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