Page 1
PLUS MAKE YOUR PRODUCTION A-PLUS
A
ASM0402C
DATA SHEET
PLUS INTEGRATED CIRCUITS INC.
A
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: 886-2-2782-9266
FAX: 886-2-2782-9255
WEBSITE : http: //www.aplusinc.com.tw
Sales E-mail: Mr. Jason
sales@aplusinc.com.tw
Technology E-mail: Mr. George
service@aplusinc.com.tw
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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
Single power supply can operate from 2.4V through 5V
Internal Program ROM: 2K x 10-bit
1 sets of 14-bit DPR can access up to 16K x 10 bits data memory space
Data Registers:
• 48 x 4-bit data RAM (00-1Fh plus 40h-4Fh)
• Unbanked special function registers (SFR) range: 20h-3Fh
I/O Ports:
• PRA: 2-bit I/O Port A (2Bh)
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
1
Rev 1.0
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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
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FIGURE 1.2 : External ROM Map of ASM0402C
g
ASM0402CASM0402C
00000h-03FFFh
12bit x 2 STACK
14-bit Data Pointer
Reserved for Testing
ram and data ROM
Pro
PC[11:0]
Reset Vector
00000h
00080h
00080h-003FFh
00400h
00000h-007FFh
007FFh(2K)
Data ROM
03FFFh(16Kx10-bits)
3
Rev 1.0
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1.2 Pin-Out
ASM0402C
ASM0402C
ASM0402C Pin-Out
VDD
PRA1
PRA0/RESET
OSC
COUT
GND
TEST
I - Power supply during operation
I/O STI
I/O STI
I - RM mode Oscillator input
O - Current Output of Audio
I - Circuit Ground Potential
O - Enter Test Mode. ( TEST = High )
1.3 Application circuit
Std./O.D.
Std./O.D.
I/O port with programmable strong pull-low or weak pull-low or fix-inputfloating capability
Output type with standard or Open-Drain output
I/O port with programmable strong pull-low or weak pull-low or fix-inputfloating capability
Output type with standard or Open-Drain output
Mask option selected as an external RESET pin with weak pull-low capability
4
Rev 1.0
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1.4 Bonding Diagram
ASM0402C
X = 1560+100(um)
Y=1030+100 (um)
16K x 10 bit ROM
ASM0402C
CHIP SIZE: X= 1560+100(um) , Y= 1030+100(um)
4 5 6 7 3 2 1
ASM0402C Pad Location Chip Size: X=1560+100 (um), Y=1030+100 (um)
PAD # PAD Name X Y PAD # PAD Name X Y
1COUT
2RA_PAD[1]
3RA_PAD[0]/RESET
4OSC_PAD
5GND
-509.92 -430.32
-203.2 -430.32
-9.04 -430.32
117.25 -430.32
-347.6 -430.32
6 TEST_PAD
7VDD
507.6 -430.32
677.52 -430.32
5
Rev 1.0
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1.5 DC Characteristics for ASMxxxxx
ASM0402C
SYMBOL PARAMETER VDD MIN. TYP. MAX. UNIT CONDITION
VDD
Isb
Iop
Iih
Ioh
Iol
dF/F
dF/F Fosc VARIATION -20 20 %
OPERATING
VOLTAGE
SUPPLY
CURREN
T
INPUT CURRENT
/Internal pull low
OUTPUT HIGH
CURRENT
OUTPUT LOW
CURRENT
FREQUENCY
STABILITY
STANDBY
OPERATING
2.4 3 5 V depending on Freq.
31
51
32
57
33
59
5 -5.2
3-3
5-8
37
520
-10 10 %
uA
mA
uA
mA
4MHz, RM
in HALT Mode
4MHz, RM
IO Floating
4MHz, RM
in HALT Mode
(IO Ports with
weak pull-high
4MHz, RM
(IO ports)
Fosc(3v)-
Fosc(2.4v)
VDD=3V,
Rosc=910k, 4MHz
pull-low)
Fosc (3v)
FIGURE 1.3 : Frequency Range for Rosc in RM mode
Resistor(k ohm) 1200 1000 820 470
3v Freq.(MHz) 3.125 3.785 4.445 7.2
Rosc & Freq.
8
7.2
6
4
Freq. MHz
2
0
0 200 400 600 800 1000 1200 1400
Rosc k ohm
4.445
3.785
3.125
6
Rev 1.0
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