參數(shù)資料
型號: AP8821
廠商: Aplus Integrated Circuits Inc.
英文描述: 21 sec VOICE OTP
中文描述: 21秒語音檢察官辦公室
文件頁數(shù): 2/13頁
文件大?。?/td> 112K
代理商: AP8821
Integrated Circuits Inc.
a
P8821
21 sec VOICE OTP
2
Features
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21 Sec Voice Length at 6 KHz
Combination of voice building blocks
extends the duration of playback
Voice data re-use saves memory space
Maximum 14 voice groups
4 trigger pins, S1 to S4 for the 4 voice
groups ( group1 ~ 4 )
SBT for sequential playblack for the rest
of voice groups & CPU mode trigger
CPU trigger mode for all 14 voice
groups
Holdable, Unholdable, Edge, Level
triggering option
Debounce time : 21ms ( Key mode ) /
85us (CPU mode ) - 6K sampling rate
IRP interrupt pin for master reset
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3 programmable Outputs for STP stop
pulse, BUSY and LED
Built-in oscillator with a single external
resistor to determine the sampling rate
Built-in D/A converter, EPROM
ADPCM data compression provides
high sound quality
Optional POP noise elimination function
C
OUT
pin drives speaker with a transistor
V
OUT1
and V
OUT2
drives buzzer or
speaker directly
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Auto-power down
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2.4V – 4.8V single power supply
operation
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Low standby current (<5uA at 3V)
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Development Tools Support
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General Description
a
P8821
is a high quality voice synthesizer capable of varying playback duration. A proprietary
ADPCM algorithm is used. The audio message is stored in a 512K bits on-chip EPROM which can
store up to 21 seconds of voice data at 6 KHz sample rate.
The
a
P8821
eliminates the need of complicated circuitry in voice playback but still achieves high
voice quality for different kind of sounds. Combinations in sections achieve longer playback duration.
A pair of PWM output pins, V
OUT1
and V
OUT2
provides direct drive to buzzer or speaker.
A current output pin, C
OUT
, enables the device to drive a speaker through a low cost NPN transistor.
No complex filtering or amplifier circuit is needed. An automatic ramp-down function eliminates
undesired noise at the end of playback.
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