INTRODUCTION
SN6A509B is a series of single chip voice/dual tone melody synthesizer IC with 16*64/8*64 LCD direct drive capability which contains two 4-bit I/O ports, two optional 4-bit output ports and a tiny controller. By programming through the tiny controller, user’s application including LCD display, section combination, trigger modes, output status, voice/melody playing and other logic functions and then be easily implemented.

FEATURES
◆ Single power supply 2.4V – 5.1V
◆ Built in a tiny controller
◆ Two 4-bit I/O ports, two optional 4-bit output ports are provided
◆ 256*4 bits RAM for programming usage are provided
◆ 256*4 bits RAM for LCD display usage are provided
◆ Maximum 96k*10 program ROM is provided
◆ Readable ROM code data
◆ Built in direct 16*64/8*64 LCD driver
◆ LCD 1/4 bias, 1/5 bias; 1/8 duty, 1/16 duty
◆ Built in a high quality speech synthesizer
◆ Adaptive playing speed from 2.5k-40kHz is provided
◆ Built in a dual tone melody generator
◆ Speech/Dual tone melody mixer is provided which SN6A509B series can play speech and dual tone melody simultaneously
◆ Fixed current D/A output is provided to drive external connected transistor for sound output
◆ PWM output is provided to drive external connected piezo buzzer