INTRODUCTION
SN6A511B 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 384k*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 SN6A511B 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