HT3494

HT3494 Multi-Function Keyboard Instrument Features Operating voltage: 3.3V~5.1V On-chip crystal oscillator: 3.58MHz 49-key instrument and compass range from C2~C6 15 outputs for key scanning 8 inputs for key scanning 32 percussion/voice space for rhythm programming 100 timbers 100 rhythms 5 percussions/voices 10 melodies 8-bit D/A audio outputs 4 percussion/voice channels output 8 melody channels output Tempo adjustable Memory function with 26 notes recordable Auto-bass-chord function Transpose function 5-chord effect Vibrato function Sustain effect Fill-in effect Chord with single or multi-keys pressed Chord with a key synchronously pressed 2 seven-segment LEDs to display operation status Indicator for chord operation 40 DIP enclosed General Description The HT3494 is a CMOS VLSI designed for musical instruments, especially 49-key multi-function instruments. The HT3494 is built-in with a controller and an ETS (Electrical Tone Synthesizer). The HT3494 provides built-in melodies, rhythms, timbers and percussion/voice outputs. The status of operating system is displayed through 2 seven-segment LEDs. The HT3494 also provides an auto-bass-chord function, memory function as well as programmable rhythm in addition to basic playing functions. 1 15 Aug ’96 Free Datasheet http://www.datasheet4u.com/ HT3494 Pin Assignment Pad Assignment Chip size: 3920 × 3730 (µm)2 * The IC substrate should be connected to VSS in the PCB layou...