HT3421A piano equivalent, 41 matrix key multi-function piano.
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Operating voltage: 2.4V~5V System operating frequency: 512KHz 12 × 7 matrix input keys Auto power-off Power ON/OFF toggle input.
The HT3421A is a 41-key musical instrument LSI implemented in the CMOS technology. The chip provides 8 rhythms, 8 timbres, 4 pulsatile sounds, 12 demo songs, and a 62-note memory storage function. The 12 × 7 matrix control keys of the HT3421A control.
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