APLUS ASM0402C Datasheet

PLUS MAKE YOUR PRODUCTION A-PLUS

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ASM0402C

DATA SHEET

PLUS INTEGRATED CIRCUITS INC.

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Address:

3 F-10, No. 32, Sec. 1, Chenggung Rd., Taipei,

Taiwan 115, R.O.C.
(115)台北市南港區成功路㆒段 32 號 3 樓之 10.

TEL: [phone]

FAX: [phone]

WEBSITE : http: //www.aplusinc.com.tw

Sales E-mail: Mr. Jason

[e-mail]

Technology E-mail: Mr. George

[e-mail]

ASM0402C – VERY LOW-COST VOICE SYNTHESIZER WITH 4-BIT MICROPROCESSOR

ASM0402C

1.0 General Description

The ASM0402C 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

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Single power supply can operate from 2.4V through 5V

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Internal Program ROM: 2K x 10-bit

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1 sets of 14-bit DPR can access up to 16K x 10 bits data memory space

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Data Registers:

• 48 x 4-bit data RAM (00-1Fh plus 40h-4Fh)

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

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I/O Ports:

• PRA: 2-bit I/O Port A (2Bh)

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

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Timer: 1

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

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Stack: 2-level subroutine nesting

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HALT and Release from HALT function to reduce power consumption

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Watch Dog Timer (WDT)

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

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Number of instruction: 22

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The Voice function can be implemented by microprocessor instruction

• One 8-bit COUT output for ASMxxxxx

1

Rev 1.0

FIGURE 1.1 : Block Diagram of ASM0402C

(12)

]

(4)

)

ASM0402C

Data Bus[3:0]

(ADDR[13:12])

=00b

COUT

PCLATCH(8)

PCH(8) PCL(4)

DPR3,2,1

DLATCH(10)

Data Bus[3:0

Accumlator

ALU(4)

Register(4)

One-Channel

( Voice synthesizer )

COUT

PC[11:0]

ADDR[13:0]

DPR[13:0]

P1,P2,P3,P4

enter test mode

Reset Chip

Reset Chip

ROM_Data[9:0]

Immediate(4

Stack

(2-Level)

ROM_ADDR[13:0]

Program

(Data)

ROM

SRAM

(48 x 4)

00h-1Fh

40h-4Fh

Clock Generator

Tes t s el ect

Power on Reset

RESET pin

Instruction Bus [9:0]

Instruction Bus [9:0]

Timer0(9)

OSC

VDD/GND

PRA0

ROM Latch

Instruction

Latch

Instruction

Decoder

Control Signal

Instruction Bus [9:0]

PRA(2)

weak or strong
pull-low for PRA

PRASL(2)

2

Rev 1.0