ISSI ® IS22C022 VERSATILE 20 SEC INSTANT VOICE ROM SEPTEMBER 1999 FEATURES GENERAL DESCRIPTION • Minimum 20 second voice length at 6 KHz IS22C022 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. • Versatile features for playback • Combination of voice building blocks extends the duration of playback • Voice data re-use saves memory space • Four trigger pins, S1 to S4 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 • COUT pin drives speaker with a transistor • VOUT1 and VOUT2 drives buzzer or speaker directly • Auto-power down • 2.4V-6V single power supply operation The IS22C022 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 IS22C022 provides wide operating voltage range from 2.4V 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 IS22C022 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 S1 to S4 pins. The SBT pin can be used to trigger multiple groups playback in sequence. • Low standby current (<5 µA at 3V) • Development tools support This specification contains ADVANCE INFORMATION data. ISSI reserves the right to make changes to its products at any time without notice in order to improve design and supply the best possible product. We assume no responsibility for any errors which may appear in this publication. © Copyright 1999, Integrated Silicon Solution, Inc. Integrated Silicon Solution, Inc. — 1-800-379-4774 Rev. A 11/15/99 1 ISSI IS22C022 ® Group Configuration Selections in Playback Frequency 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. 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. An example of group configuration is illustrated below: Group No. Section Entry Selections in Playback Mode Group 1 Sec 1 + Sec 2 + Sec 3 ……. Sec 109 Group 2 Sec 3 + Sec 2 Group 3 Sec 10 + Sec 11 + Sec 12 Group 4 Sec110 + Sec 10 + Sec 5 There are two playback modes, Sequential and Random in the IS22C022. 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 Selections in Output Buffer 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 IS22C022. 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. 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 Programmable Options 1. LED1 LED2 Busy Groups in IS22C022 can have independent options. They include: 2. STOP LED1 LED2 3. Busy Stop LED1 4. LED2 Busy Stop • 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 Selections in Triggering The IS22C022 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. 2 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 ISSI 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. Integrated Silicon Solution, Inc. — 1-800-379-4774 Rev. A 11/15/99 ISSI IS22C022 ® BLOCK DIAGRAM OSC OSCILLATOR VCC VOICE EPROM ADDRESS SEQUENCER GND CLOCK GENERATOR ADPCM DECODER S1 S2 S3 S4 SBT IRP CONTROL LOGIC D/A COUT POP NOISE REDUCTION OUT1 OUT2 OUT3 BUZZER BUFFER OUTPUT DRIVER VOUT1 VOUT2 PIN DESCRIPTION PIN CONFIGURATIONS 300-mil PDIP OUT1 Programmable output 1 OUT2 Programmable output 2 OUT3 Programmable output 3 OUT1 1 16 IRP VOUT1 PWM audio signal output for buzzer and speaker VOUT1 2 15 SBT VOUT2 PWM audio signal output for buzzer and speaker VOUT2 3 14 S4 GND Power ground GND 4 13 S3 COUT Current output from internal DAC for speaker playback OUT2 5 12 VCC OSC Oscillator resistor pin to control sampling frequency OUT3 6 11 S2 VPP Program power supply, no connect when voice playback COUT 7 10 S1 S1 Trigger switch 1, internal pull low, active high OSC 8 9 VPP S2 Trigger switch 2, internal pull low, active high VCC Positive power supply S3 Trigger switch 3, internal pull low, active high S4 Trigger switch 4, internal pull low, active high SBT Sequential trigger, internal pull low, active high IRP Interrupt to stop playback, internal pull low, active high Note: 1. The following pins are used to program data into the memory: pins 4, 5, 6, 8, 9, 12, 15 and 16. Integrated Silicon Solution, Inc. — 1-800-379-4774 Rev. A 11/15/99 3 ISSI IS22C022 BONDING DIAGRAM 12 11 BONDING PARAMETERS Pin Name 1 OUT1 -6 –1017 2 VOUT1 297 –1017 3 VOUT2 803 –1017 4 GND 1058 –1017 5 OUT2 927 1017 6 OUT3 697 1017 7 COUT 199 1017 8 OSC –103 1017 9 VPP –358 1017 Pad size = 80 µm x 80 µm 10 S1 –566 1017 Die size = 2350 x 2260 µm 11 S2 –810 1017 92.5 x 88.97 mil 12 VCC –1059 1017 13 S3 –934 –1017 14 S4 –689 –1017 15 SBT –444 –1017 16 IRP –200 –1017 10 9 8 7 6 5 NC Y X (0,0) 13 14 15 16 NC ® 1 2 3 4 Note: Substrate must be connected to GND Note: Programming requires connection to pins 4, 5, 6, 8, 9, 12, 15, and 16. X Y ABSOLUTE MAXIMUM RATINGS Symbol VCC - GND VIN VOUT TA TSTG 4 Parameter Terminal Voltage with Respect to GND Operating Temperature Storage Temperature 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 Integrated Silicon Solution, Inc. — 1-800-379-4774 Rev. A 11/15/99 ISSI IS22C022 ® DC CHARACTERISTICS Symbol Parameter Description Test Conditions Min. Typ. Max. Unit 3.0 1 6.0 5 V µA — 3.0 0 –12 12 –2 –5 5 8 — 100 3.5 0.3 — — — — — 10 5 µA V V mA mA mA mA mA mA % VCC ISB Operating Voltage Standby Current Vcc = 3.0V, I/O Open 2.4 — IOP VIH VIL IOH IOL ICO 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 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) — 2.5 –0.3 — — — — — 6 — ISTPH ISTPL I LED ÐF/F SAMPLING FREQUENCY vs ROSC FOR IS22C022 SAMPLING FREQUENCY vs ROSC FOR IS22C022 Common Sampling Rate vs. Oscillator Resistor Common Resistors vs. Sampling Rate 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 1,920 1,750 1,610 1,490 1,380 1,290 1,200 1,130 1,070 1,010 961 915 874 835 Integrated Silicon Solution, Inc. — 1-800-379-4774 Rev. A 11/15/99 ROSC Kohm 2000 1500 1300 1200 1000 910 820 750 680 560 510 470 Sampling Frequency KHz 4.8 6.5 7.5 8.0 9.5 10.5 11.7 12.7 14.0 16.7 18.1 19.5 5 ISSI IS22C022 ® TIMING WAVEFORMS 1. Level, Unholdable, Non-retriggerable a. Trigger is shorter than a Group output b. Trigger is longer than a Group output S1 S2 COUT Group 2 Group 1 Group 2 Group 2 LED STP 2. Level Holdable a. Trigger is shorter than a Group output b. Trigger is longer than a Group output S1 S2 COUT Group 2 Group 1 Group 2 Group 2 LED 3. Single Button Trigger (SBT), Sequential a. Level Unholdable SBT COUT Group 1 Group 2 Group 2 Group 2 Group N Group 1 Group 2 Group 2 Group 2 Group N Group 1 b. Level Holdable SBT COUT Group 1 Where N is up to 8. 6 Integrated Silicon Solution, Inc. — 1-800-379-4774 Rev. A 11/15/99 ISSI IS22C022 4. Edge, Unholdable, Non-retriggerable a. Trigger is shorter than a Group output ® b. Trigger is longer than a Group output S1 S2 COUT Group 2 Group 1 Group 2 STP LED 5. Edge Holdable a. Trigger is shorter than a Group output b. Trigger is longer than a Group output S1 S2 COUT Group 2 Group 1 Group 2 LED 6. Single Button Trigger (SBT), Sequential a. Edge Unholdable SBT COUT Group 1 Group 2 Group N Group 1 b. Edge Holdable SBT COUT Group 1 Group 2 Group N Group 1 Where N is up to 8. Integrated Silicon Solution, Inc. — 1-800-379-4774 Rev. A 11/15/99 7 ISSI IS22C022 ® APPLICATION CIRCUITS TYPICAL APPLICATION Vcc ROSC SP OSC S1 S2 S3 S4 SBT IRP Vcc VOUT1 ROSC OSC COUT S1 S2 S3 S4 SBT IRP R GND VOUT2 C PIEZO BUZZER OR 32/64 OHM SPEAKER GND CASCADE APPLICATION Vcc ROSC Vcc ROSC SP OSC OSC COUT COUT SBT IRP R SBT OUT3 GND IRP GND Notes: 1. To direct dirve a speaker or buzzer, C is needed (C = 0.1 µF). 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. 8 Integrated Silicon Solution, Inc. — 1-800-379-4774 Rev. A 11/15/99 ISSI IS22C022 ® PRALLEL APPLICATION Vcc ROSC OSC Vcc ROSC SP OSC COUT S1 S2 S3 S4 SBT IRP COUT S1 S2 S3 S4 SBT IRP GND R GND LED APPLICATION Vcc ROSC OSC S1 S2 S3 S4 SBT IRP SP COUT R OUT2 OUT1 GND Notes: The following are typical values: 1. ß of NPN transistor > 130. 2. SP = 8Ω. 1/4W. 3. Piezo buzzer resonant frequency = 1 KHz. Integrated Silicon Solution, Inc. — 1-800-379-4774 Rev. A 11/15/99 9 ISSI IS22C022 ® CDS APPLICATION Vcc ROSC SP OSC CDS COUT R SBT IRP GND 8-SEGMENT TRIGGER APPLICATION SW8 Vcc ROSC SW5 SW1 SW6 SP OSC S1 COUT SW2 R S2 SW7 SW3 SW4 10 S3 S4 GND Integrated Silicon Solution, Inc. — 1-800-379-4774 Rev. A 11/15/99 ISSI IS22C022 ® ORDERING INFORMATION Commerical Range: 0°C to +70°C Order Part No. Package IS22C022X Unpackaged IS22C022P 300-mil Plastic DIP NOTICE Integrated Silicon Solution, Inc., reserves the right to make changes to the products contained in this publication in order to improve design, performance or reliability. Integrated Silicon Solution, Inc. assumes no responsibility for the use of any circuits described herein, conveys no license under any patent or other right, and makes no representation that the circuits are free of patent infringement. Charts and schedules contained herein reflect representative operating parameters, and may vary depending upon a user's specific application. While the information in this publication has been carefully checked, Integrated Silicon Solution, Inc. shall not be liable for any damages arising as a result of any error or omission. Integrated Silicon Solution, Inc. does not recommend the use of any of its products in life support applications where the failure or malfunction of the product can reasonably be expected to cause failure of the life support system or to significantly affect its safety or effectiveness. Products are not authorized for use in such applications unless Integrated Silicon Solution, Inc. receives written assurances, to its satisfaction, that: (a) the risk of injury or damage has been minimized; (b) the user assumes all such risks; and (c) potential liability of Integrated Silicon Solution, Inc. is adequately protected under the circumstances. Copyright 1999 Integrated Silicon Solution, Inc. Reproduction in whole or in part, without the prior written consent of Integrated Silicon Solution, Inc., is prohibited. ISSI ® Integrated Silicon Solution, Inc. 2231 Lawson Lane Santa Clara, CA 95054 Tel: 1-800-379-4774 Fax: (408) 588-0806 E-mail: [email protected] www.issi.com Integrated Silicon Solution, Inc. — 1-800-379-4774 Rev. A 11/15/99 11