Casio SK-60 - Block Diagram

— 3 —
CPU
LSI1
MSM6755B-10
Keyboard
Buttons
PG
Q1, X1
Reset IC
IC1
RE5VL40AA
Q103
Voltage Regulator
Q101, Q102, D102
Mic. Amp.
Q105, Q106
Mic. input
VCC  DVDD
AVDD
Power Supply Circuit
APO
MD0 ~ MD7 MA0 ~ MA14
RAM (256 Kbit)
LSI2
HM62256BLSP-8
KI0 ~ KI3
KO0 ~ KO7
KI4 ~ KI7
Amp./Voltage Regulator
IC101
AN8053N
BLOCK DIAGRAM