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APLUS
VERSATILE 20 SEC INSTANT VOICE ROM
FEATURES
* Minimum 20 second voice length at 6 KHz * Versatile features for playback * Combination of voice building blocks extends the duration of playback * Voice data re-use saves memory space * Four trigger pins, TG1 to TG4 for eight groups * SBT for sequential play-all or random play * Holdable and unholdable, edge and level triggering option * 15 ms debounce time suitable for CDS * IRP interrupt pin for master reset * Three programmable output pins for STP Stop Pulse, BUSY Signal, and LED * Built-in oscillator with variable sample rate * Single external resistor to determine sample 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 VOUT2 drives buzzer or speaker directly * Auto-power down * 3.0V-6V single power supply operation * Low standby current (<5 A at 3V) * Development tools support
API8208A
GENERAL DESCRIPTION
API8208A 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 20 seconds of voice data at 6 KHz sample rate. The API8208A 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 API8208A provides wide operating voltage range from 3.0V to 6.0V. PWM digital amplifier output pins, VOUT1 and VOUT2 provides direct drive to buzzer or speaker. A current output pin, COUT, 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.
Group of sections
The voice data memory area of the API8208A can be subdivided into 126 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 toTG4 pins. The SBT pin can be used to trigger multiple groups playback in sequence.
11/15/99
1
APLUS
Group Configuration
Voice within each group are combinations of different fixed memory sections of up to 126 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: Group No. Group 1 Group 2 Group 3 Group 4 Section Entry Sec 1 + Sec 2 + Sec 3 ....... Sec 109 Sec 3 + Sec 2 Sec 10 + Sec 11 + Sec 12 Sec110 + Sec 10 + Sec 5
API8208A
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 Playback Mode
There are two playback modes, Sequential and Random in the API8208A If the chip is programmed in Sequential Mode, messages will playback in the order from Group 1 to Group 8 by triggering the SBT pin. If the chip is programmed in Random Mode, messages will be played back randomly by triggering the SBT pin.
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 API8208A 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.
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 1. 2. 3. 4. LED1 Stop Busy LED2 OUT2 Busy LED2 LED1 Stop OUT3 LED2 LED1 Stop Busy
Programmable Options
Groups in API8208A can have independent options. They include: * * * * * * Edge or Level trigger Unholdable or Holdable trigger Retriggerable or non-retriggerable Sequential or Random playback LED1, LED2, Busy, and Stop pulse are configurable Four selections in playback frequency
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.
Selections in Triggering
The API8208A 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 current message and start the next message immediately.
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 into their applications very easily.
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APLUS
BLOCK DIAGRAM
OSC OSCILLATOR ADDRESS SEQUENCER CLOCK GENERATOR
API8208A
VCC
VOICE EPROM
GND
TG1 TG2 TG3 TG4 SBT IRP OUT1 OUT2 OUT3
ADPCM DECODER CONTROL LOGIC POP NOISE REDUCTION OUTPUT DRIVER BUZZER BUFFER VOUT1 VOUT2
D/A
COUT
PIN CONFIGURATIONS
300-mil PDIP
PIN DESCRIPTION
OUT1 OUT2 OUT3 VOUT1 VOUT2 GND COUT OSC VPP
TG1 TG2 VCC TG3 TG4
Programmable output 1 Programmable output 2 Programmable output 3 PWM audio signal output for buzzer and speaker PWM audio signal output for buzzer and speaker Power ground Current output from internal DAC for speaker playback Oscillator resistor pin to control sampling frequency Program power supply, no connect when voice playback Trigger switch 1, internal pull low, active high Trigger switch 2, internal pull low, active high Positive power supply Trigger switch 3, internal pull low, active high Trigger switch 4, internal pull low, active high Sequential trigger, internal pull low, active high Interrupt to stop playback, internal pull low, active high
OUT1 VOUT1 VOUT2 GND OUT2 OUT3 COUT OSC
1 2 3 4 5 6 7 8
16 15 14 13 12 11 10 9
IRP SBT TG4 TG3 VCC TG2 TG1 VPP
SBT IRP
Note: 1. The following pins are used to program data into the memory: pins 4, 5, 6, 8, 9, 12, 15 and 16.
3
APLUS
BONDING DIAGRAM
Pin 1 2
12 11 10 9 8 7 6 5
NC
API8208A
BONDING PARAMETERS
Name OUT1 VOUT1 VOUT2 GND OUT2 OUT3 COUT OSC VPP TG1 TG2 VCC TG3 TG4 SBT IRP X -6 297 803 1058 927 697 199 -103 -358 -566 -810 -1059 -934 -689 -444 -200 Y -1017 -1017 -1017 -1017 1017 1017 1017 1017 1017 1017 1017 1017 -1017 -1017 -1017 -1017
3 4 5 6 7 8 9 10 11 12 13 14 15 16
Y X (0,0)
13 14
15
16
NC
1
2
3
4
Note: Substrate must be connected to GND Pad size = 80 m x 80 m Die size = 2350 x 2260 m 92.5 x 88.97 mil
Note: Programming requires connection to pins 4, 5, 6, 8, 9, 12, 15, and 16.
ABSOLUTE MAXIMUM RATINGS
Symbol VCC - GND VIN VOUT TA TSTG Parameter Terminal Voltage with Respect to GND Value -0.5 to +7.0 GND - 0.3 < VIN < VCC + 0.3 GND < VOUT < VCC -10 to +85 -55 to +125 Unit V V V C C
Operating Temperature Storage Temperature
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APLUS
DC CHARACTERISTICS
Symbol VCC ISB IOP VIH VIL IOH IOL ICO ISTPH ISTPL ILED F/F Parameter Description Operating Voltage Standby Current Operating Current Input HIGH Voltage Input LOW Voltage VOUT HIGH Operating Current VOUT LOW Operating Current COUT Operating Current STP HIGH Operating Current STP LOW Operating Current LED Output Current Frequency Stability Test Conditions Vcc = 3.0V, I/O Open Vcc = 3.0V, I/O Open Vcc = 3.0V Vcc = 2.0V Vcc = 3.0V, VOUT = 3.0V Vcc = 3.0V, VOUT = 0V Vcc = 3.0V, VCOUT = 0.7V Vcc = 3.0V, VSTP = 3.0V Vcc = 3.0V, VSTP = 0V Vcc = 2.2V - 6.0V (FOSC [3V] - FOSC [3.5V]) / FOSC (3.0V)
API8208A
Min. 3.0 -- -- 2.5 -0.3 -- -- -- -- -- 6 -- Typ. 4.5 1 -- 3.0 0 -12 12 -2 -5 5 8 -- Max. 6.0 5 100 3.5 0.3 -- -- -- -- -- 10 5 Unit V A A V V mA mA mA mA mA mA %
SAMPLING FREQUENCY vs ROSC FOR API8208A
Common Sampling Rate vs. Oscillator Resistor Sampling Frequency KHz 5.0 5.5 6.0 6.5 7.0 7.5 8.0 8.5 9.0 9.5 10.0 10.5 11.0 12.0 ROSC Kohm 290 262 240 220 201 187 174 162 153 143 135 127 120 108
SAMPLING FREQUENCY vs ROSC FOR API8208A
Common Resistors vs. Sampling Rate Sampling Frequency KHz 13.0 14.0 16.0 22.0 Rosc KOhm 100 91 82 54
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APLUS
TIMING WAVEFORMS
1. Level, Unholdable, Non-retriggerable a. Trigger is shorter than a Group output
API8208A
b. Trigger is longer than a Group output
TG1 TG2 COUT LED STP
Group 2 Group 1 Group 2 Group 2
2. Level Holdable a. Trigger is shorter than a Group output
b. Trigger is longer than a Group output
TG1 TG2 COUT LED
Group 2 Group 1 Group 2 G roup 2
3. Single Button Trigger (SBT), Sequential a. Level Unholdable
SBT COUT
Group 1 Group 2 Group 2 Group 2 Group N Group 1
b. Level Holdable
SBT COUT
Group 1 Group 2 Group 2 Group 2 Group N Group 1
Where N is up to 8.
6
APLUS
4. Edge, Unholdable, Non-retriggerable a. Trigger is shorter than a Group output
API8208A
b. Trigger is longer than a Group output
TG1 TG2 COUT STP LED
Grroup 2 Group 1 Grouup 2
5. Edge Holdable a. Trigger is shorter than a Group output
b. Trigger is longer than a Group output
TG1 TG2
Group 2 Group 1 Group 2
COUT LED
6. Single Button Trigger (SBT), Sequential a. Edge Unholdable
SBT COUT
Group 1 Group2 Group N Group 1
b. Edge Holdable
SBT COUT
Group 1 Group 2 Group N Group 1
Where N is up to 8.
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APLUS
APPLICATION CIRCUITS TYPICAL APPLICATION
API8208A
ROSC OSC TG1 TG2 TG3 TG4 SBT IRP
Vcc SP COUT R
ROSC OSC TG1 TG2 TG3 TG4 SBT IRP
Vcc VOUT1 VOUT2
C
PIEZO BUZZER OR 32/64 OHM SPEAKER
GND
GND
CASCADE APPLICATION
ROSC
Vcc
ROSC OSC
Vcc SP COUT
OSC COUT SBT IRP SBT OUT3 GND IRP
R
GND
Notes: 1. To direct dirve a speaker or buzzer, C is needed (C = 0.1 F). 2. R = 330 Ohm (if using transistor 8050 and Vcc = 4.5V). 3. SP = 8 Ohm speaker. 4. To determine the value of ROSC, refer to the Sampling Frequency vs. ROSC tables on page 5.
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APLUS
PARALLEL APPLICATION
Vcc OSC TG1 TG2 TG3 TG4 SBT IRP GND COUT Vcc
API8208A
ROSC
ROSC OSC TG1 TG2 TG3 TG4 SBT IRP
SP COUT R
GND
LED APPLICATION
ROSC OSC TG1 TG2 TG3 TG4 SBT IRP
Vcc COUT R
SP
OUT2 OUT1 GND
Notes: The following are typical values: 1. B of NPN transistor > 130. 2. SP = 8W. 1/4W. 3. Piezo buzzer resonant frequency = 1 KHz.
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APLUS
CDS APPLICATION
ROSC CDS OSC Vcc
API8208A
SP COUT R SBT IRP GND
8-SEGMENT TRIGGER APPLICATION
SW8
ROSC
SW5 SW1 SW6 SW2
Vcc SP OSC TG1 TG2 COUT R
SW7
SW3 SW4
TG3 TG4 GND
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