INTRODUCTION
SN6A297 is a single chip voice/dual tone melody synthesizer IC with 8*40 direct drive capability which contains two 4-bit I/O ports, one 4-bit output port 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 are provided, one 4-bit output ports are provided
◆ 272*4 bits RAM for programming usage are provided (page0~15, m8~m15 of page18 and page21)
◆ 80*4 bits RAM for LCD display usage are provided
◆ Maximum 108k*10 program ROM is provided
◆ Readable ROM code data
◆ Built in direct 8*40 LCD driver
◆ LCD 1/4 bias; 1/4 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 SN6A297 can play speech and dual tone melody simultaneously
◆ Fixed current D/A output is provided to drive external connected transistor for sound output