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PDF HT84192 Data sheet ( Hoja de datos )
| Número de pieza | HT84192 | |
| Descripción | Magic VoiceTM | |
| Fabricantes | Holtek Semiconductor Inc | |
| Logotipo |  |
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HT84XXX
Magic VoiceTM
Features
· Operating voltage: 2.4V~5.0V
· Programmable tone melody generator
· ADPCM or m-law PCM, PCM synthesis
· Wide range of sampling rate for voice
synthesis
· Minimum sampling rate step: 100Hz
· Voice melody mixed output
· Programmable 2 channels of melody mixed
output
· Programmable 2 channels of voice mixed
output
· 13 kinds of melody beats
· 5 octaves of tone level and 18 tempos
· 16 levels of digital volume control
· Two current type D/A outputs
· Eight programmable I/O pins
· Four programmable input pins
· Provides 36 sec to 384 sec of voice capacity
· Timer controller
· Voice fill-in function
· Powerful user-defined functions
· Power-on initial setting
· 28-pin SKDIP package
Applications
· High-end educational leisure products
· Alert and warning systems
· Speech synthesizers and sound effect
generators
General Description
The HT84XXX family is a series of programma-
ble speech synthesizers and tone generators de-
signed for user-defined voice and melody
applications. It provides various sampling
rates and beats, tone levels, tempos for the
speech synthesizer and melody generator. The
HT84XXX series has two built-in high quality,
current type D/A outputs with 16 levels of vol-
ume control. The user¢s commands enable the
user to program the powerful custom function
such as to build-in a tiny controller. The Magic
VoiceTM provides various operational functions
similar to arithmetic operation, logic operation,
branch decision, random counter, and a pro-
grammable timer. The Magic VoiceTM series
are suitable for versatile voice and sound effect
applications.
The HT84XXX Magic VoiceTM is Easy For-
matTM supported.
ROM Selection Table
The HT84XXX series provides various voice capacity as shown below:
Part No.
ROM
Voice
Length
HT84036
768Kb
36 sec
HT84072
1536Kb
72 sec
HT84144
3072Kb
144 sec
HT84192
4096Kb
192 sec
Note: The voice capacity is based on a sampling rate of 21Kb/s
HT84384
8192Kb
384 sec
Magic VoiceTM is a trademark of Holtek Semiconductor Inc.
Easy FormatTM is a trademark of Grow With Me, Inc.
1
April 26, 2000
1 page  
HT84144
HT84XXX
(0 , 0 )
VDD 1
18 O S C
AUD0 2
3
17 V S S
16 V S S
4 5 6 7 8 9 10 11 12 13 14 15
Chip size: 2735 ´ 3735 (mm)2
* The IC substrate should be connected to VSS in the PCB layout artwork.
5 April 26, 2000
5 Page 
HT84XXX
Functional Description
The Magic VoiceTM series is a series of program-
mable speech synthesizers and melody genera-
tors. It provides various sampling rates and
beats, tone levels, tempos for speech synthe-
sizer and melody generator. For voice synthe-
sizer, the Magic VoiceTM provides 8-bit PCM,
6-bit m-law PCM and 4-bit ADPCM synthesis.
In HT84XXX series, a mixed output of two
channels PCM synthesis is allowed but only
one channel ADPCM synthesis is allowed. For
melody generator, the Magic VoiceTM supports
a tone melody and PCM melody generator and
two channels mixed output for the whole series.
The Magic VoiceTM series build-in 8 program-
mable I/O pins and 4 programmable input pins
along with powerful user¢s command. The
user¢s instructions are employed to develop
new and customized functions for a wide vari-
ety of innovative applications.
Speech and melody analysis
The speech and melody sources of the Magic
VoiceTM can be recorded and edited from the PC
sound card and media tools. Holtek¢s CAD tools
first load a speech source file as .WAV or .PCM
format, then transfer the speech file as PCM,
LOG-PCM or ADPCM format, and finally save
it to the internal mask ROM by changing a
layer of the mask. The PCM format generates a
higher sound quality whereas the ADPCM for-
mat brings about a longer recording capacity.
The melody source can either be in the .MID or
in the .MLD format.
The .MID file is the standard format of the win-
dows media tools. The .MLD file is a text for-
mat. After the .MID file is compiled, the .MLD
file is automatically generated.
The Magic VoiceTM can support the following
compression format of the voice .WAV and
.PCM file: AD4, PCM8, m-law PCM.
Current type D/A output
The HT84XXX series supply two high accuracy
current type D/A output pins for audio output.
The output volume is changeable from 0 to 15
digital levels by writing a value to the VOL-
UME_n (n=1 or 2) registers. The D/A pins are
PMOS open drain structure and ouput synthe-
sized signals for driving a speaker through an
external NPN transistor when the chip is ac-
tive. However, it becomes floating when the
chip is in the standby state. An 8050 type tran-
sistor with hFE=150 is recommended for the
output driver of the D/A output pin.
Melody/Tone generator
The HT84XXX family has a built-in mel-
ody/tone generator. The generator can generate
13 different kinds of melody beats, 5 octaves of
tone level, 18 tempos, and 2 channels mixed
output. Of these components, the melody tempo
is changeable and generates sound effects by
writing a control value to the TEMPO register.
The chip provides the following 18 tempos, 13
beats, and 5 octaves for user¢s programming.
· 18 tempos (Beats/Min.)
68 78 82 93 100 105
109 114 119 125 132 139
147 156 179 192 227 310
· 13 beats
1 1 1 1 1 1 1 2 3 1, 4 3 2
24, 12, 8, 6, 4, 3, 2, 3, 4, 3, 2,
· 5 octaves
C1~B1, C2~B2, C3~B3, C4~B4, C5~B5
PCM/ADPCM synthesizer
The HT84XXX family contains a PCM and
ADPCM synthesizer. The synthesizer offers a
wide range of sampling rates from 4kHz to
24kHz for PCM synthesis and 4kHz to 16kHz
for ADPCM synthesis. The sampling rate of the
synthesizer can be changed by writing a control
value to the sampling rate register. It also sup-
ports a small variety of 100Hz. For a higher
performance sound quality, the PCM coding is
required. But for a longer recording capacity,
the ADPCM coding is recommended.
11 April 26, 2000
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet HT84192.PDF ] | |
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