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HT813D0 Datasheet

  • HT813D0

  • 5.6 Second LOG-PCM Speech

  • 12頁

  • HOLTEK

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HT813D0
5.6 Second LOG-PCM Speech
Features
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Operating voltage: 2.4V~5.0V
Directly drives an external transistor
Low standby current (1
碌
A 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
碌
s at a
6kHz sampling rate)
5.6-second voice capacity (based on a 6kHz
sampling rate)
Controllable volume
FLAG1 options:
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End-pulse output
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3HzB flash
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6HzB flash
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Voice output indication
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Busy output
FLAG2 options:
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3Hz flash
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6Hz flash
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Busy output
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8 keys
Key options:
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Stop key: KEY8
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Random (only for KEY1)
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Sequential (only for KEY1)
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Repeat (for all KEYs)
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Key debounce time (for all KEYs): 700
碌
s,
22ms, 45ms, 180ms (based on a 6kHz sam-
pling rate)
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One shot (for all KEYs)
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Level-trigger
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Pull-high resistance (for all KEYs)
Section options:
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Retriggerable
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Non-retriggerable
Dice form or 16-pin DIP/SOP
Applications
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Toys
Alarm clocks
Public address system
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Alert & warning system
Sound effect generators
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鈥檚 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.
1
5th May 鈥?8

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