SN6A297

SN6A297 LCD Controller with Voice/Dual Tone Melody „ 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 Š Š Š Š Š Š Š Š Š Š Š Š Š Š 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 1 May 24, 2001 SN6A297 LCD Controller with Voice/Dual Tone Melody „ PIN ASSIGNMENT Symbol SEG1-SEG40 COM8-COM1 GND P23-P20 P33-P30 P43-P40 VO RESET OSC TEST XIN,XOUT VDD VLCDR VLC1, VLC2, VLC3, VLC4 I I/O O O I I/O I/O O O I I I Function Description Segment 1~40 for LCD drive...