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General Description

The ASM5206C is very low cost voice synthesizer with 4-bit microprocessor. It has various features 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 technology and halt function can minimize power dissipation. Its architecture is similar to RISC, with two stages of instruction pipeline. It allows all instructions to be executed in a single cycle, except for program branches and data table read instructions (which need two instruction cycles).

Feature

Single power supply can operate from 2.4V through 5V

Internal Program ROM: 4K x 10-bit

1 sets of 18-bit DPR can access up to 160K x 10 bits data memory space

Data Registers:

? 64 x 4-bit data RAM (00-1Fh plus 40h-5Fh)

? Unbanked special function registers (SFR) range: 20h-3Fh

I/O Ports:

? PRA: 4-bit I/O Port A (2Bh)

? PRB: 2-bit Output Port B (2Dh)

On-chip clock generator: Resistive Clock Drive(RM)

Timer: 1

? Timer0: a 9-bit auto-reload timer/counter

Stack: 2-level subroutine nesting

HALT and Release from HALT function to reduce power consumption

Watch Dog Timer (WDT)

Instruction: 1-cycle instruction except for table read and program branches which are 2-cycles

Number of instruction: 22

The Voice function can be implemented by microprocessor instruction

? One 8-bit COUT output for ASMxxxxx