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HT813D0 Datasheet(PDF) 1 Page - Holtek Semiconductor Inc |
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HT813D0 Datasheet(HTML) 1 Page - Holtek Semiconductor Inc |
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1 / 12 page  HT813D0 5.6 Second LOG-PCM Speech Features • Operating voltage: 2.4V~5.0V • Directly drives an external transistor • Low standby current (1 µA typ. for VDD=3V) • Minimal external components • 380 words table ROM for key functions • Programmable silence length and end-pulse width (minimal end-pulse width is 330 µs at a 6kHz sampling rate) • 5.6-second voice capacity (based on a 6kHz sampling rate) • Controllable volume • FLAG1 options: – End-pulse output – 3HzB flash – 6HzB flash – Voice output indication – Busy output • FLAG2 options: – 3Hz flash – 6Hz flash – Busy output • 8 keys • Key options: – Stop key: KEY8 – Random (only for KEY1) – Sequential (only for KEY1) – Repeat (for all KEYs) – Key debounce time (for all KEYs): 700 µs, 22ms, 45ms, 180ms (based on a 6kHz sam- pling rate) – One shot (for all KEYs) – Level-trigger – Pull-high resistance (for all KEYs) • Section options: – Retriggerable – Non-retriggerable • Dice form or 16-pin DIP/SOP General Description The HT813D0 is a single-chip LOG-PCM voice synthesizer LSI with 5.6-second voice capacity at 6kHz sampling rate. The chip when triggered 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 HT813D0 provides 8 key inputs and 2 pro- grammable FLAG outputs. With 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 instructions of section playback arrangement of each key are stored in the table ROM. The key features are also programmable. With such a flexible structure, the HT813D0 is excellent for versatile voice applications. Applications • Toys • Alarm clocks • Public address system • Alert & warning system • Sound effect generators 1 5th May ’98 |
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