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HT81003 Datasheet

  • HT81003

  • EasyVoiceTM 3-Second Speech

  • 11頁

  • HOLTEK

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Preliminary
Features
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HT81003/HT81R03
TM
EasyVoice 3-Second Speech
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Operating voltage: 2.4V~3.6V
Directly drives an external transistor
PWM function directly driver speaker
Low standby current (1mA typ. for V
DD
=3V)
Minimal external components
240 notes table ROM for key functions
Programmable silence length and end-pulse
width (minimal end-pulse width is 1.3ms at
8kHz sampling rate)
3-sec voice capacity (based on a 5kHz sam-
pling rate)
Controllable volume
FLAG1 options
-
End-pulse output
-
3Hz, 3HzB flash
-
6Hz, 6HzB flash
-
Busy output
-
OFF
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FLAG2 options
-
3Hz flash
-
6Hz flash
-
Busy output
-
OFF
2 keys
Key options
-
Sequential/Directed
-
Repeat (KEY2)
-
STOP key (KEY2)
-
Key debounce time: 1.2ms, 22ms, 45ms
(based on a 8kHz sampling rate)
-
One shot/Normal
-
Pull-high resistance: 0, 50kW,
100kW, 200kW
Section options
-
Retriggerable
-
Non-retriggerable
Dice form or 16-pin DIP package
Applications
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Leisure products
Alarm clocks
Public address system
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Alert and warning system
Sound effect generators
General Description
The HT81003 is a Mask ROM type and
HT81R03 is an OTP type. The HT81003/
HT81R03 is a single-chip voice synthesizer LSI
with 3-second voice capacity at 5kHz sampling
rate. The chip when triggered drives a speaker
through an external transistor with a PWM
output. Negligible current is consumed in the
standby state.
The HT81003/HT81R03 provides 2-key inputs
and 2 programmable FLAG outputs. With
2.4V~5.0V power supply, a complete synthe-
sized voice playback system can be easily built
with very few external components.
The customer壟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 HT81003/HT81R03 is ex-
cellent for versatile voice applications.
EasyVoice
TM
is a trademark of Holtek Semiconductor Inc.
1
July 24, 2000

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