HT81003_02 Datasheet, PDF (1/8 Pages) Holtek Semiconductor Inc – EasyVoiceTM 3-Second Speech

HT81003
EasyVoice^TM 3-Second Speech
Features
· Operating voltage: 2.4V~5V
· 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 sampling
rate)
· Controllable volume
· FLAG1 options
- End-pulse output
- 3Hz, 3HzB flash
- 6Hz, 6HzB flash
- Busy output
- OFF
· 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
· Leisure products
· Alarm clocks
· Public address system
· Alert and warning system
· Sound effect generators
General Description
The HT81003 is a Mask ROM type. The HT81003 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 provides 2-key inputs and 2 programma-
ble 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 section 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 programma-
ble. With such a flexible structure, the HT81003 is excel-
lent for versatile voice applications.
EasyVoice^TM is a trademark of Holtek Semiconductor Inc.
Rev. 1.10
1
January 22, 2002