asm0402c Aplus Integrated circuits Inc., asm0402c Datasheet - Page 3

• Manufacturer Part Number: asm0402c
• Description: Very Low-cost Voice Synthesizer With 4-bit Microprocessor
• Manufacturer: Aplus Integrated circuits Inc.

COUT
FIGURE 1.1 : Block Diagram of ASM0402C
(ADDR[13:12])
=00b
DLATCH(10)
DPR3,2,1
PCLATCH(8)
( Voice synthesizer )
PCH(8)
One-Channel
Register(4)
Data Bus[3:0]
ALU(4)
COUT
Accumlator(4)
PC[11:0]
PCL(4)
ADDR[13:0]
DPR[13:0]
enter test mode
P1,P2,P3,P4
Data Bus[3:0]
Reset Chip
Reset Chip
Immediate(4)
ROM_Data[9:0]
0
1
ROM_ADDR[13:0]
Clock Generator
Power on Reset
Stack(12)
(2-Level)
Test select
RESET pin
40h-4Fh
00h-1Fh
SRAM
(48 x 4)
Program
(Data)
ROM
2
Instruction Bus [9:0]
Instruction Bus [9:0]
Timer0(9)
VDD/GND
OSC
Control Signal
ROM Latch
Instruction
Instruction
Decoder
Latch
ASM0402C
PRA(2)
PRASL(2)
Rev 1.0
weak or strong
pull-low for PRA