Features: • Integrated text-to-speech processor:
High voice quality, unlimited vocabulary
Converts any ASCII text into speech automatically
Capable of very high reading rates
Add/modify messages by simply editing a text file
On-the-fly control of speed, pitch, volume, etc.
• On-chip recording, storage and playback of sound files:
Record to chip via microphone
Upload, download, and erase recordings and sound files, even in the field
Data logging mode allows analog quantities to be sampled and stored for later retrieval
Recording times from 130 sec to 15 min available
• Tone generation:
Three voice musical
Dual sinusoidal
DTMF (Touch-Tone) dialer
• On-chip A/D converter:
Four channels, 8-bit resolution
One-shot, continuous, single sweep, and continuous sweep modes of operation
Software and hardware triggering
Support for external op amp
• Analog and digital audio outputs
• Stop, pause, and resume controls
• Serial and 8 bit bus interfaces
• User programmable greeting and default settings
• Flexible user exception dictionary:
Change the pronunciation of any input string based on spelling and context
Convert encrypted data into meaningful messages
Trigger tone generation, recorded message playback, voice parameter changes
• In-circuit, field programmable
• 8 KB input buffer for virtually no-overhead operation
• Available in 3.3 V and 5 V versions
• Low power (typ @ 3.3 V):
6 mA active
600 A idle
100 nA standbyApplication• Robotics
• Talking OCR systems
• ATM machines
• Talking pagers and PDAs
• GPS navigation systems
• Vending and ticketing machines
• Remote diagnostic reporting
• Dial-up information systems
• Handheld barcode readers
• Electronic test and measurement
• Security systems
• Aids for the orally or visually disabled
• Meeting federal ADA requirementsPinout
SpecificationsSupply voltage, VCC and AVCC. . . . . . . . . . . . . . . .. 0.3 V to +6.5 V
DC input voltage, VI. . . . . . . . . . . . . . . . . . . . . 0.3 V to VCC +0.3 V
Operating temperature, TA. . . . . . . . . . . . . . . . . . . . . 0 to +70
Storage temperature, TS. . . . . . . . . . . . . . . . . . . 55 to +125 DescriptionThe RC8660 is a versatile voice and sound synthesizer, integrating a text-to-speech (TTS) processor, audio recording and playback, musical and sinusoidal tone generators, telephone dialer and A/D converter, into an easy to use chipset. Using a standard serial or eight bit bus interface, virtually any ASCII text can be streamed to the RC8660 for automatic conversion into speech by the TTS processor. The audio record and playback modes augment the TTS processor for applications requiring very high voice quality and a relatively small, fixed vocabulary, applications requiring special sounds or sound effects, and/or the recording of voice memos. The audio output is delivered in both analog and digital PCM audio formats, which can be used to drive a speaker or digital audio stream.
The RC8660's integrated TTS processor incorporates RC Systems' DoubleTalk™ TTS technology, which is based on a unique voice concatenation technique using real human voice samples. The DoubleTalk TTS processor also gives the user unprecedented real-time control of the speech signal, including pitch, volume, tone, speed, expression, articulation, and so on.
Up to 3.5 MB of nonvolatile memory is included in the RC8660 for the storage of up to 15 minutes of recorded messages and sound effects. A programmable "greeting" message can be stored that is automatically played whenever the RC8660 is powered up, allowing a custom message to be played or the RC8660's default settings to be reconfigured.
A user-programmable dictionary allows the pronunciation of virtually any character string to be redefined, or even trigger the playback of tones, pre-recorded messages and sounds based on specific input patterns. All of these features can be programmed and updated via a standard serial port, even in the field after the RC8660 has been integrated into the end-product.
The RC8660 is comprised of two surface-mounted devices. Both operate from a +3.3 V or +5 V supply and consume very little power. Most applications require only the addition of a lowpass filter/audio power amplifier to implement a fully functional system.
RC8660 Data Sheet
