HT81XXX
EasyVoice
TM
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
·
FLAG2 options
3Hz flash
6Hz flash
Busy output
OFF
·
6 keys (Directed)
·
8 keys (Matrix key)
·
Key options
-
-
-
-
(minimal end-pulse width is 1.3ms at 8kHz sampling
rate)
·
Controllable volume
·
FLAG1 options
-
-
-
-
-
End-pulse output
3Hz, 3HzB flash
6Hz, 6HzB flash
Busy output
OFF
Sequential/Directed
Repeat (KEY2~KEY6)
STOP key (KEY6)
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
·
Alert and warning system
·
Sound effect generators
General Description
The EasyVoice
TM
is a single-chip voice synthesizer LSI .
The chip when triggered drives a speaker directly or
through an external transistor with a PWM output. Negli-
gible current is consumed in the standby state.
The HT81XXX provides direct key or Matrix key input
and 2 programmable FLAG outputs. With 2.4V~5.0V
power supply, a complete synthesized voice playback
system can be easily built with very few external compo-
nents.
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 EasyVoice
TM
is
excellent for versatile voice applications.
Selection Table
Mask
Part No.
Voice Capacity
Note:
OTP
HT81003
HT81R03
3 sec
6 sec
HT81006
HT81009
HT81R09
9 sec
12 sec
HT81012
HT81018
HT81R18
18 sec
HT81R36
36 sec
The voice capacity is calculated based on 5kHz sampling rate.
For 3-second capacity HT81003/HT81R03 devices, refer to the its relevant data sheet.
EasyVoice
TM
is a trademark of Holtek Semiconductor Inc.
Rev. 1.50
1
November 21, 2006
HOLTEK [ HOLTEK SEMICONDUCTOR INC ]
