AP8842 Datasheet, PDF (2/14 Pages) Aplus Intergrated Circuits – 42 sec VOICE OTP

Integrated Circuits Inc. aP8842
42 sec VOICE OTP
„ Features
z 42 Sec Voice Length at 6 KHz
z Combination of voice building blocks
extends the duration of playback
z Voice data re-use saves memory space
z Maximum 30 voice groups
z 8 trigger pins, S1 to S8 for the 8 voice
groups ( group1 ~ 8 )
z SBT for sequential playblack the rest of
voice groups & for CPU mode trigger
z S1 to S5 in CPU trigger mode to trigger
all 30 voice groups
z Holdable, Unholdable, Edge, Level
triggering option
z Debounce time : 22ms for both Key and
CPU mode @ 6K sampling rate
z IRP interrupt pin for master reset
z 3 programmable Outputs for STP stop
pulse, BUSY and LEDs
z Built-in oscillator with a single external
resistor to determine the sampling rate
z Built-in D/A converter, EPROM
z ADPCM data compression provides
high sound quality
z Optional POP noise elimination function
z C_OUT pin drives speaker with a transistor
z V_OUT1 and V_OUT2 drives buzzer or
speaker directly
z Auto-power down
z 2.7V – 3.8V single power supply
operation
z Low standby current (<5uA at 3V)
z Development Tools Support
„ General Description
aP8842 is a high quality voice synthesizer capable of varying playback duration. A proprietary
ADPCM algorithm is used. The audio message is stored in a 1M bits on-chip EPROM which can
store up to 42 seconds of voice data at 6 KHz sample rate.
The aP8842 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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