asm25512c Aplus Integrated circuits Inc., asm25512c Datasheet - Page 2

• Manufacturer Part Number: asm25512c
• Description: Very Low-cost Voice Synthesizer With 4-bit Microprocessor
• Manufacturer: Aplus Integrated circuits Inc.

ASM25512C –
1.0 General Description
The ASM25512C 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 20-bit DPR can access up to 768K x 10 bits data memory space
Data Registers:
I/O Ports:
On-chip clock generator:
Timer: 1
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
• PRA: 4-bit I/O Port A (2Bh)
• PRB: 4-bit Output Port B (2Dh)
• PRC: 4-bit Input Port C (2Fh)
• 96 x 4-bit data RAM (00-1Fh plus 40h-7Fh)
• Unbanked special function registers (SFR) range: 20h-3Fh
• Timer0: a 9-bit auto-reload timer/counter
• One 8-bit COUT output for ASM25512C
VERY LOW-COST VOICE SYNTHESIZER WITH 4-BIT MICROPROCESSOR
Resistive Clock Drive(RM)
1
Rev 1.1
ASM25512C
2002/10/29