including 4-bit ALU, ROM, RAM, I/O ports, timers, clock generator, watchdog timer(WDT), voice synthesizer, etc. It consists of 22 instructions in the device. With CMOS te.

: Item VDD VSS A0-A3 B0-B3 C0-C3 COUT PWM1 PWM2 Explain Power supply during operation Ground Potential 4 bit I/O ( PRA) 4 bit output (PRB) 4 bit input (PRC) Current output PWM1 ( Connect to speaker and buzzer ) PWM2 ( Connect to speaker and buzzer ) .

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