Button Matrix
KI1
KO0
Registration
Transpose/
KO1
Tune
Magical
KO2
Preset
KO3
KO4
KO5
ScaleMode
Tempo
KO6
Down
KO7
C up
KO8
C down
KO9
Mode
Scale
KO10
Memory 1
Reset Circuit
Initial reset
When batteries are set or an AC adapter is connected, the reset IC provides a low pulse to the CPU.
The CPU then initializes its internal circuit and clears the working strage RAM.
Power ON reset
When the power switch is pressed, the CPU receives a low pulse of POWER signal. The CPU provides
APO signal to the power supply circuit, then provides RESET signal to the DSP, the key touch LSI and
the KO signal generators.
Battery set
VDD
RESET
Reset IC
IC104
RE5VA35AA
POWER
From power switch
KI2
KI3
Song
Memory
Touch
Control
Response
Tone
Rhythm
Digital
Accomp
Effect
G# down
ScaleTune
B up
Tempo
Synchro/
Up
Ending
C# up
D up
C# down
D down
Pad B
Pad D
Scale
Rec
Memory 2
VDD
CPU
-RESET
LSI102
HD6433298A36P
-NMI
KI4
KI5
3
2
Demo
Layer
9
8
6
5
A down
A# down
A# up
A up
Variation/
Normal/
Fill-In
Fill-In
D# up
E up
D# down
E down
Pad A
Pad C
Scale
Scale
Memory 3
Memory 4
DVDD
KO Signal Generator
IC303/304
TC74HC174P
VDD
Working Strage RAM
LSI104
SRM2264LC90,10
— 5 —
KI6
KI7
1
0
Split
7
+
4
-
B down
G down
G# up
G up
Intro
Start/Stop
F up
F# up
F down
F# down
DVDD
DSP
LSI105
HG51B155FD
DVDD
Key Touch LSI
LSI106
HG52E35