The following table is the pin functions of the CPU

5V source for internal ADC (Analog to Digital Converter) Chip enable signal for memory devices. LOW active. Output enable signal for memory devices. LOW active. Write enable signal for RAM. LOW active. Write enable signal for Percussion generator. LOW active. ROM pack's chip select signal. LOW active. Ground (OV) source for internal digital circuit Ground (OV) source for internal analog circuit Demo Music ROM's data address change signal. Data bus for Demo Music ROM becomes data or address in...

Tc4066 Wiring Diagram

Diagrama Tc4066

RESET amp POWER ON OFF DETECTION CIRCUIT When the power switch is turned on, terminal Ml receives a differential pulse which triggers CPU operation. By receiving signal K09 from Kl 1 KI4, or KI8 terminal, CPU descriminates the Mode switch position. Since VA stays at 5V even power switch is turned off or at the APO Auto Power Off , the reset signal appears only when new batteries are set or an AC adaptor is inserted. The noise killer circuit eliminates...

Pin Function of Percussion Generator

Casio Trigger

The terminal holds LOW level at power switch on for initializing the internal circuit The LSI reads the percussion data from the CPU when the terminal is LOW level. Chip select signal input. Fixed at LOW level. Ground 0V source for internal digital circuit 5V source for internal digital circuit CPU outputs four each of pitch and envelope signals. Normally all the signals are for melody sounds however, when the demonstration music is played, each pitch and envelope signals become obbligato,...