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BUTTON MATRIX
KO0
KO1
KO2
KO3
KO4
POWER SUPPLY CIRCUIT
The power supply circuit generates four voltages as shown in the following table.
Name
VDD
AVDD
AVCC
AVFF
KI0
Piano2
E. Piano
Piano1
Strings
Vibraphone
Pipe organ
Song A
Song B
Control
Tune up
Voltage
+5 V
CPU, Reset IC, Working storage RAM, DSP, Key touch LSI, Sound
source ROM, Effect RAM, Gate array
+5 V
DAC
+12 V
Filter, Mixer
-12 V
Filter, Mixer
KI1
KI2
Harpsichord
Choir
Reverb
Record
Tune down
For operation of
— 11 —
KI3
W. Bass
E. Bass
Start/Stop
Demo
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