APLUS API8108A Datasheet
API8108AAPLUS
VOICE ROM
FEATURES
inimum 10 second voice length at 6 KHzM *
ersatile features for playbackV*
ombination of voice building blocksC*
extends the duration of playback
oice data re-use saves memory spaceV*
Four trigger pins,TG1 to TG4 for eight groups*
SBT for sequential play-all*
oldable and unholdable, edge and levelH#
triggering option
15 ms debounce time suitable for CDS*
RP interrupt pin for master resetI*
Three programmable output pins for STP Stop*
Pulse, BUSY Signal, and LED
ANTTILE 10 SEC INSTVERSA
JUNE 1999
uilt-in oscillator with variable sample rateB*
ingle external resistor to determine sample rateS*
uilt-in D/A converter, EPROMB*
ADPCM data compression provides high sound*
quality
ptional pop noise elimination functionO*
*C
pin drives speaker with a transistorOUT
drives buzzer or speaker2OUT and V1OUT#V
directly
uto-power downA*
3.0V-6V single power supply operation*
A at 3V)mLow standby current (<5 *
evelopment tools supportD*
GENERAL DESCRIPTION
API8108A is a high quality voice synthesizer capable of
varying playback duration. A proprietary ADPCM algorithm
is used. The audio message is stored in a 256K bits onchip EPROM which can store up to ten seconds of voice
data at 6 KHz sample rate.
The API8108A eliminates the need of complicated circuitry
in voice playback but still achieves high voice quality.
Sounds such as human speech, animal sounds, musical
sounds and even special sound effects can be synthesized.
Versatile combinations in sections achieve longer playback
duration. In addition, devices can be cascaded to achieve
longer voice duration. Two devices can be configured in
parallel in order to achieve signal mixing without an external
mixer in which speech can be mixed with background
music each from one of two different chips.
The API8108A provides wide operating voltage range
feom 2.8Vto6.0V.PWM digital amplifier output pins,VOUT1
provides direct drive to buzzer or speaker.2OUTand V
OUTA current output pin, C
, enables the device to drive a
speaker through a low cost NPN transistor. No complex
filtering or amplifier circuit is needed. An automatic rampdown function eliminates undesired noise at the end of
playback.
Group of sections
The voice data memory area of the API8108A can be
subdivided into 124 sections. Any combination of these
sections will form an individual group for data playback. A
maximum of eight groups are available with activation
controlled by TG1 to TG4 pins. The SBT pin can be used to
trigger multiple groups playback in sequence.
Group Configuration
Voice within each group are combinations of different fixed
memory sections of up to 124 sections. These sections are
the fundamental voice building blocks for arranging
playback without limiting sequencing. This provides
flexibility and allows data to be re-used, beneficial for
applications with many repeated sounds or words.
An example of group configuration is illustrated below:
Section EntryGroup No.
Sec 1 + Sec 2 + Sec 3 -----. Sec 1091Group
Sec 3 + Sec 2Group 2
Sec 10 + Sec 11 + Sec 12Group 3
Sec110 + Sec 10 + Sec 5Group 4
1
APLUS API8108A
Group Configuration
The entry of sections for each group is truly random and
without limitation. However, there is a limit in the total
number of entries for eight groups, which is 992 in the
API8108A It is acceptable to allocate all entries into only
one group or distribute out to other groups. It depends on
how many groups of messages are required.
(continued)
Programmable Options
Groups in API8108A can have independent options. They
include:
* Edge or Level trigger
* Unholdable or Holdable trigger
* Retriggerable or non-retriggerable
* LED1, LED2, Busy, and Stop pulse are configurable
* Four selections in playback frequency
Selections in Triggering
The API8108A can be triggered in different ways, Edge or
Level trigger, Holdable or Unholdable, Retriggerable or
Non-retriggerable. The combinations of the triggering options provide versatile playback.
By enabling Retrigger, the playback can be controlled in
Stop and Start mode. A trigger on any trigger pin will stop the
content message and start the next message immediately.
Selections in Playback Frequency
This option provides four choices for each group in frequency
which implies it is possible to have four different sampling
rates in one chip or one sample rate with a different playback
frequency. As a matter of fact, the available choices are also
dependent on the pullup resistor value at the OSC pin. For
example, if the fundamental frequency choice is F, it can
provide choices in x1, x1-1/2, x2, x3.
Selections in Output Buffer
There are three independent output pins, OUT1, OUT2, and
OUT3, available for several combinations of LED1, LED2,
Stop Pulse, and Busy Signal for each group. The following
table illustrates the four different combinations.
OUT1 OUT2 OUT3
1. LED1 Busy LED2
2. Stop LED2 LED1
3. Busy LED1 Stop
4. LED2 Stop Busy
LED1 and LED2 are complemented outputs flashing at
approximately a 3 Hz rate. Stop pulse (STOP) gives a 15 ms
positive pulse at the end of the playback for each Group with
option have or do not have the Stop pulse.
Busy is active high and Section dependent but not Group
dependent. Even if same section in different group may
have different output in Busy output. For instance, BUSY
can be high for Section 4 in Group 1 but low in Group 4.
BUSY can be used as a synchronous signal. During standby
mode all three outputs must be low.
Software Support
APLUS provides dedicated software to the customer. With this
tool, the customer can compose their own messages and
configure the chip to fit intor their applications very easily.
2
APLUS API8108A
BLOCK DIAGRAM
¨
OSC
TG1
TG2
TG3
TG4
SBT
IRP
OUT1
OUT2
OUT3
OSCILLATOR
CLOCK
GENERATOR
CONTROL
LOGIC
OUTPUT
DRIVER
ADDRESS
SEQUENCER
POP NOISE
REDUCTION
VOICE
EPROM
ADPCM
DECODER
D/A
BUZZER
BUFFER
CC
V
GND
C
OUT
V
OUT1
V
OUT2
3
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