RTS903 Description
RTS903 DUAL-TONE MELODY GENERATOR .RTS903 Features
* - Wide operating voltage range: 2.4V to 5.0V Low Stand-by current 768-note ROM memory Direct LED drive, where LED flash is programmable. Typical oscillator frequency: 128 KHz Built-in digital envelope 1 sequence trigger key Audio output drives speaker directly. Power-ON Reset; melody begins from theRTS903 Applications
* Pin Assignment Block Diagram OSCI OSCO Tone Generator Oscillator Circuit Modulator OUT PEN PLED NC NC OUT PEN PTB TRB NC NC 1 2 3 4 5 6 7 8 16 15 14 13 GND NC OSCO OSCI VDD PLED NC NC Rhythm Generator Address Counter Tempo Generator ROM Ripple Counter RTS90312 11 10 9 TRB PTB Control Logic
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