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32 to 40 SEC INSTANT VOICE ROM
FEATURES
* Voice length at
- 8 KHz sampling is 32 seconds
- 6 KHz sampling is 40 seconds
* Silence compression to save memory
* Eight trigger pins,TG1 to TG8 for 32 sections
* SBT pin play-all or sequential play-all
* 15 ms debounce time suitable for CDS
* IRP interrupt pin stops playback at once
* STP stop pulse generated at end of playback
* BUSY signal for CPU control
* Two LEDs flash at 3 Hz internal
* 3.0V to 6V single power supply operation
* Low standby current (<5 uA at 3V)
* Auto-power down
* Built-in oscillator, D/A converter, EPROM
* ADPCM data compression
* Optional pop noise elimination function
*C
OUT pin drives speaker with a transistor
* Development tools support
*V
OUT1 and VOUT2 drives buzzer directly
* Sampling rate determined by external resistor
* Holdable and unholdable triggering option
* Industrial temperature available
GENERAL DESCRIPTION
API840N is a high-quality voice synthesizer with a capacity
of 32 to 40 seconds. A proprietary ADPCM algorithm is
used. The audio message is stored in a 1024-Kbit on-chip
EPROM.
The API840N eliminates the need of complicated circuitry
in voice playback (Figure 1) but still achieves high voice
quality. Sounds such as human speech, animal sounds,
musical sounds, and even special sound effects can be
synthesized. Devices can be cascaded to achieve longer
voice duration (Figure 3). Two devices can be configured
in parallel (Figure 4) in order to achieve signal mixing
without an external mixer allowing speeches to be mixed
with background music synthesis from two different chips.
The instant programming nature of the API840N allows a
very short production turnaround time. There are no NRE
charges that are usually required with conventional voice
ROMs. Users now can apply a voice synthesis function as
an additional feature to their products even when production
volume is relatively small. It is also ideal for trial or
engineering prototyping. As a result, the initial investment
is minimal and the risk in the product development phase
is reduced.
The API840N provides a wide voltage operating range
from 3.0V to 6.0V. A pair of PWM output pins, V
OUT1 and
VOUT2 provide direct drive to a buzzer (Figure 2). Voice
quality from a buzzer is comparable to speaker output and
power consumption is much lower.
A current output pin, COUT, enables the device to drive a
speaker with a low cost NPN transistor. No complex
filtering or amplifier circuit is needed. An automatic ramp
up/down function eliminates the undesired noise at the
end of playback.
Up to 32 sections are accessible through TG1 to TG8.The
SBT trigger pin can be programmed to playback all 32
sections or sequentially from section 1 to 32. An interrupt
pin (IRP) and stop pulse (STP) or BUSY signals provide
handshaking with microprocessors or other API840N
devices. All trigger pins give 15 ms debounce time and is
ideal for CDS applications as in Figure 6. Two LED drivers
are available, flashing on and off at approximately 3Hz
intervals (Figure 5). The internal voltage compensation
oscillator requires only one external resistor. Different
sampling frequencies are determined by the external
oscillator resistor value.
JUNE 1999
APLUS API840N
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Programmable Options
The API840N provides different control functions for user
specified applications. They include:
* Non-sequential or Sequential Play-all
* Unholdable or Holdable trigger
* STOP or BUSY signal selection
* Automatic ramp-up/ramp-down or no ramp-up/ramp-down
OSCILLATOR
OSC
CLOCK
GENERATOR
CONTROL
LOGIC
TG1
TG8
SBT
IRP
LED
DRIVER
LED2
LED1
STP
POP NOISE
REDUCTION
ADDRESS
SEQUENCER
VOICE
EPROM
ADPCM
DECODER
BUZZER
BUFFER
D/A
C
OUT
V
OUT1
V
OUT2
GND
Vcc
BLOCK DIAGRAM
OPERATING RANGE
Range Ambient Temp. Vcc
Commercial 0°C to +70°C 3.0V to 6.0V
Industrial -40 °C to +85°C 3.0V to 6.0V
ABSOLUTE MAXIMUM RATINGS
(1)
Symbol Parameter Value Unit
VTERM Terminal Voltage with Respect to GND -0.5 to +7.0 V
TBIAS Temperature Under Bias -40 to +85 °C
TSTG Storage Temperature -55 to +125 °C
Notes:
1. Stress greater than those listed under ABSOLUTE MAXIMUM RATINGS may cause permanent damage to the
device. This is a stress rating only and functional operation of the device at these or any other conditions above
those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum
rating conditions for extended periods may affect reliability.
Silence Compression
If a particular sound sequence includes periods of silence,
the API840N will automatically compress the silence to
save memory space. This compression will not affect
playback of the sound sequence.
APLUS API840N
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SECTION TRIGGERING
TG1 TG2 TG3 TG4 TG5 TG6 TG7 TG8 Section
HIGH NC NC NC NC NC NC NC 1
NC HIGH NC NC NC NC NC NC 2
NC NC HIGH NC NC NC NC NC 3
NC NC NC HIGH NC NC NC NC 4
NC NC NC NC HIGH NC NC NC 5
NC NC NC NC NC HIGH NC NC 6
NC NC NC NC NC NC HIGH NC 7
NC NC NC NC NC NC NC HIGH 8
HIGH HIGH NC NC NC NC NC NC 9
NC HIGH HIGH NC NC NC NC NC 10
NC NC HIGH HIGH NC NC NC NC 11
NC NC NC HIGH HIGH NC NC NC 12
NC NC NC NC HIGH HIGH NC NC 13
NC NC NC NC NC HIGH HIGH NC 14
NC NC NC NC NC NC HIGH HIGH 15
HIGH NC NC NC NC NC NC HIGH 16
HIGH HIGH HIGH NC NC NC NC NC 17
NC HIGH HIGH HIGH NC NC NC NC 18
NC NC HIGH HIGH HIGH NC NC NC 19
NC NC NC HIGH HIGH HIGH NC NC 20
NC NC NC NC HIGH HIGH HIGH NC 21
NC NC NC NC NC HIGH HIGH HIGH 22
HIGH NC NC NC NC NC HIGH HIGH 23
HIGH HIGH NC NC NC NC NC HIGH 24
HIGH HIGH HIGH HIGH NC NC NC NC 25
NC HIGH HIGH HIGH HIGH NC NC NC 26
NC NC HIGH HIGH HIGH HIGH NC NC 27
NC NC NC HIGH HIGH HIGH HIGH NC 28
NC NC NC NC HIGH HIGH HIGH HIGH 29
HIGH NC NC NC NC HIGH HIGH HIGH 30
HIGH HIGH NC NC NC NC HIGH HIGH 31
HIGH HIGH HIGH NC NC NC NC HIGH 32
APLUS API840N
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PIN DESCRIPTIONS
Name I/O Function
TG8 I Trigger Switch 8, Internal Pull LOW,
Active HIGH
O Drives First LED Flash at 3 Hz,
Active LOW
VOUT1 O PWM Audio Signal Output for
Buzzer
VOUT2 O Compliment PWM Audio Signal
Output for Buzzer
GND - Power Ground
STP/BUSY O Generate 30 ms Pulse or Busy
Signal After Voice Playback
O Drives Second LED Flash at 3 Hz,
Active LOW
COUT O Current Output from Internal DAC
for Speaker Playback
OSC I Oscillator Resistor Pin to Control
Sampling Frequency
TG5
I Trigger Switch 5, Internal Pull LOW,
Active HIGH
TG6
I Trigger Switch 6, Internal Pull LOW,
Active HIGH
VPP - Program Power Supply, No
Connect When Voice Playback
TG1 I Trigger Switch 1, Internal Pull LOW,
Active HIGH
TG2
I Trigger Switch 2, Internal Pull LOW,
Active HIGH
VCC - Positive Power Supply
TG3
I Trigger Switch 3, Internal Pull LOW,
Active HIGH
TG4
I Trigger Switch 4, Internal Pull LOW,
Active HIGH
SBT I One Key or Sequential Trigger,
Internal Pull LOW, Active HIGH
IRP I Interrupt to Stop Playback, Internal
Pull LOW, Active HIGH
TG7 I Trigger Switch 7, Internal Pull LOW,
Active HIGH
Note:
1. The following pins are used to program data into the memory on the chip:
pins 5, 6, 7, 9, 12, 15, 18 and 19.
PIN CONFIGURATION
20-Pin 300-mil PDIP
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
TG8
LED1
V
OUT1
V
OUT2
GND
STP
LED2
C
OUT
OSC
TG5
TG7
IRP
SBT
TG4
TG3
V
CC
TG2
TG1
V
PP
TG6
APLUS API840N
LED 1
LED 2
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DC CHARACTERISTICS
Symbol Parameter Description Condition Min. Typ. Max. Unit
VCC Operating Voltage 3.0 4.5 6.0 V
ISB Standby Current VCC = 3.0V, I/O Open - 1 5 mA
IOP Operating Current Vcc = 3.0V, I/O Open - - 100 mA
VIH Input HIGH Voltage Vcc = 3.0V 2.5 3.0 3.5 V
VIL Input LOW Voltage Vcc = 3.0V -0.3 0 0.3 V
IOH VOUT LOW O/P Current Vcc = 3.0V, VOUT = 0V - -12 - mA
IOL VOUT HIGH O/P Current Vcc = 3.0V, VOUT = 3.0V - 12 - mA
ICO COUT O/P Current Vcc = 3.0V, VCOUT = 0.7V - - 2 - mA
ISTPH STP LOW O/P Current Vcc = 3.0V, VSTP = 0V - - 5 - mA
TSTPL STP HIGH O/P Current Vcc = 3.0V, VSTP = 3.0V - 5 - mA
ILED Output Current LED Vcc = 3.0V - 6.0V 6 8 10 mA
DF/F Frequency Stability FOSC(3V) - F OSC(3.5V) - - 5 %
FOSC (3V)
BONDING PARAMETERS
Pin Name X Y
1
TG8
3451.9 1599.7
2 3451.9 1861.0
3VOUT1 3451.9 2147.6
4VOUT2 3451.9 2444.5
5 GND 3368.10 2803.35
6 STP 137.18 2795.93
7 100.4 2486.3
8COUT 100.4 2245.0
9 OSC 100.4 1790.0
10
TG5
100.4 1469.5
11 TG6 100.4 1230.0
12 VPP 100.4 989.6
13 TG1 100.4 662.3
14 TG2 100.4 422.7
15 VCC 187.05 113.78
16
TG3
3372.5 141.8
17 TG4 3451.9 581.5
18 SBT 3451.9 836.0
19 IRP 3451.9 1090.6
20
TG7
3451.94 1345.13
BONDING DIAGRAM
(0,0)
X
Y
Note: Substrate must be connected to GND
Pad size = 100 mm x 100 mm
5
4
3
2
1
20
19
18
17
16
6
7
8
9
10
11
12
13
14
15
APLUS API840N
LED1
LED2
Die size:3628mm x 3797mm
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PULSE TRIGGERED.
a. Trigger is shorter than a phrase output b. Trigger is longer than a phrase output
TG1
Phrase 2
TG2
C
OUT
Phrase 1 Phrase 2 Phrase 2
SINGLE BUTTON TRIGGER, NON-SEQUENTIAL PLAY-ALL (SBT)
a. Pulse Triggered
b. Level Triggered
Phrase 1
SBT
C
OUT
Phrase 2 Phrase N Phrase 1 Phrase N Phrase 1
Phrase 1
SBT
C
OUT
Phrase 2 Phrase 1 Phrase N Phrase 1
LEVEL TRIGGERED
a. Trigger is shorter than a phrase output b. Trigger is longer than a phrase output
TG1
Phrase 2
TG2
COUT
LED
Phrase 1 Phrase 2
Phrase 2
APLUS API840N
TIMING DIAGRAM
STP
LED
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SINGLE BUTTON TRIGGER, SEQUENTIAL (SBT)
a. Pulse Triggered
b. Level Triggered
Phrase 1
SBT
C
OUT
Phrase 2 Phrase 2 Phrase 2 Phrase N Phrase 1
Phrase 1
SBT
C
OUT
Phrase 2 Phrase 2 Phrase 2 Phrase N Phrase 1
APLUS API840N
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APPLICATION CIRCUITS
Vcc
GND
TG1
TG2
TG3
TG4
TG5
TG6
TG7
TG8
SBT
IRP
OSC
C
OUT
SP
R
OSC
Vcc
GND
SBT
IRP
OSC
C
OUT
SP
ROSC
Vcc
GND
SBT
IRP
OSC
ROSC
COUT
STP
Figure 1. Typical Application with Speaker
Figure 3. Cascade Application
Figure 2. Typical Application with Piezo Buzzer
Vcc
GND
TG1
TG2
TG3
TG4
TG5
TG6
TG7
TG8
SBT
IRP
OSC
V
OUT2
R
OSC
V
OUT1
PIEZO
BUZZER
APLUS API840N
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APPLICATION CIRCUITS
Vcc
GND
TG1
TG2
TG3
TG4
TG5
TG6
TG7
TG8
SBT
IRP
TG1
TG2
TG3
TG4
TG5
TG6
TG7
TG8
SBT
IRP
OSC
C
OUT
SP
ROSC
Vcc
GND
OSC
C
OUT
ROSC
Vcc
GND
TG1
TG2
TG3
TG4
TG5
TG6
TG7
TG8
SBT
IRP
OSC
C
OUT
SP
ROSC
LED2
LED1
Figure 5. LED Application
Figure 4. Parallel Application
(Mixing two speeches or speech with background music)
APLUS API840N
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Notes:
The following are typical values:
1. R
OSC = 2.0 MW.
2. B for N (NPN transistor) > 130.
3. SP = 8W. 1/4W.
4. Piezo buzzer resonant frequency = 1 KHz.
APPLICATION CIRCUITS
Vcc
GND
TG1
TG2
TG3
TG4
OSC
C
OUT
SP
ROSC
ROSC
Vcc
GND
OSC
CDS
IRP
SBT
C
OUT
SP
SW4
SW3
SW7
SW6
SW5
SW8
SW2
SW1
Figure 6. CDS Application and Additional Trigger
APLUS API840N
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