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HT815D0 Datasheet(PDF) 1 Page - Holtek Semiconductor Inc |
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HT815D0 Datasheet(HTML) 1 Page - Holtek Semiconductor Inc |
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1 / 15 page  HT815D0 11.2-Second LOG-PCM Speech 1 March 15, 2000 Features · Operating voltage: 2.4V~5.0V · Directly drives an external transistor · Low standby current (1mA typ. for VDD=3V) · Minimal external components · 508 words table ROM for key functions · Programmable silence length and end-pulse width (minimal end-pulse width is 330msata 6kHz sampling rate) · 11.2-second voice capacity (based on a 6kHz sampling rate) · FLAG1 options – End-pulse output – 3HzB flash – 6HzB flash – Voice output indication – Busy output · FLAG2 options – 3Hz flash – 6Hz flash – Busy output · Controllable volume · 12 keys · Key options – Stop key: KEY12 – Random (only for KEY1) – Sequential (only for KEY1) – Repeat (for all KEYs) – Key debounce time (for all KEYs): 700ms, 22ms, 45ms, 180ms (based on a sampling rate of 6kHz) – One shot (for all KEYs) – Level-trigger – Pull-high resistance (for all KEYs) · Section options – Retriggerable – Non-retriggerable · Dice form or 16/20/24-pin DIP, 20/24-pin SOP package General Description The HT815D0 is a single chip LOG-PCM voice synthesizer LSI with 11.2-second voice capacity at 6kHz sampling rate. The chip when trig- gered drives a speaker through an external transistor with a current switch D/A converter output. Negligible current will be consumed in the standby state. The HT815D0 provides 12 key inputs and 2 pro- grammable FLAG outputs. With a 2.4V~5.0V power supply, a complete synthesized voice playback system can be easily built with very few external components. The customer¢s voice sources are recorded sec- tion by section into an internal mask ROM. The sectional playback arrangement instructions of each key are stored in the table ROM. The key features are also programmable. With such a flexible structure, the HT815D0 is excellent for versatile voice applications. Applications · Leisure products · Alarm clocks · Public address system · Alert & warning system · Sound effect generators |
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