1. INTRODUCTION
SNC21085 is a one-channel voice synthesizer IC with Push-Pull direct drive circuit. It
built in a 4-bit tiny controller with three 4-bit I/O ports. By programming through the tiny
controller in SNC21085, user’s varied applications including voice section combination,
key trigger arrangement, output control, and other logic functions can be easily
implemented.
2. FEATURES
Single power supply 2.4V – 5.5V
System Clock is 2MHz, the instruction cycle is 4us
85 seconds voice capacity are provided (@6KHZ sample rate)
Built in a 4-bit tiny controller
I/O Port
Three 4-bit I/O ports P1, P2 and P3 are provided
The driving/sink current of P3.2 & P3.3 is up to 8mA/16mA
The IO pins P3.3 or P2.3 can be modulated with 38.5Khz carry signal to
implement IR function.
PWM output for IO (P3.0~P3.3ATChip.com)
128*4 bits RAM are provided
Maximum 16k program ROM is provided
256K*10 shared ROM for voice data and program
Readable ROM code data
Built-in one channel High Quality speech synthesizer
Adaptive playing speed from 2.5k-20kHz is provided
Automatic repetition
Support 5-bit ADPCM and 10 bit PCM format
Built in an 8-level volume control Push-Pull Direct Drive circuit output, can directly
connected to Speaker for sound output
Push-Pull DAC with 12 bits resolution (Direct Drive)
Event Mark function supported
Low-Voltage Detect circuit
Watch Dog Timer Reset function.
SNC21340,SNC21301,SNC21300,SNC21269,SNC21268,SNC21201,SNC21200,
SNC21169,SNC21168,SNC21121,SNC21120,SNC21085,SNC21060,SNC21040,
SNC21030,SNC20AS,SNC209S,SNC208S,SNC207S,SNC206S,SNC205S,SNC204S,
SNC203S,SNC202S,SNC201S,
