ASM4112C

ASM3112C/4112C DATA SHEET ASM3112C/4112C ASM3112C/4112C – VERY LOW-COST VOICE SYNTHESIZER WITH 4-BIT MICROPROCESSOR 1.0 General Description The ASM3112C/4112C 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). 1.1 Feature Single power supply can operate from 2.4V through 5.5V Internal Program ROM: 4K x 10-bit 1 sets of 17-bit DPR can access up to 128K x 10 bits data memory space Data Registers: 96 x 4-bit data RAM (00-1Fh plus 40h-7Fh) Unbanked special function registers (SFR) range: 20h-3Fh I/O Ports: PRA: 4-bit I/O Port A (2Bh) PRB: 4-bit Output Port B (2Dh) PRC: 4-bit Input Port C (2Fh) 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 micro...