INTRODUCTION
SN52020 is a 20 seconds single chip 2-channel voice synthesizer IC which contains I/O pins and a tiny controller. By programming through the tiny controller, users’ applications including section combination, trigger modes, output status, high performance melody, multiple voices, and other logic functions can be implemented.

FEATURES
♦ Single power supply 2.4V – 5.5V
♦ Built in a tiny controller
♦ 20 seconds voice capacity are provided
♦ 64*4 bits RAM are provided
♦ ROM Size
   − Maximum 64K*10 bits ROM size
   - 64K program ROM is provided
♦ Readable ROM code data
♦ I/O Ports
   - One 4-bit I/O ports P3
   - The driving/sink current of P3.2 & P3.3 are 8mA/16mA
♦ Built in a high quality speech synthesizer
♦ Two independent voice channels
♦ Adaptive playing speed from 4k-40kHz is provided for all 2 channels individually
♦ A 6-bit*8-bit Multiplier is embed to modulate the volume of synthesized voices
♦ One digital mixers (with saturation control) are provided
♦ Built in an 8-level volume control Analog Push-Pull Direct Drive circuit.
♦ System clock: 2M Hz (RC-type or Crystal Option)
♦ Low Voltage Reset
♦ Built-in WDT function
♦ Built-in Event Mark Function