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,
