(RSC-300 / RSC-364) Speech Recognition Microcontroller

w speaker-independent speech recognition, speakerdependent speech recognition, and speaker verification. The chip also supports speech synthesis, voice record/playback, 4-voice music synthesis, and system control. This CMOS device includes on-chip RAM, ROM (RSC-364 only), 16 general-purpose I/O lines, A/D and D/A converters, a microphone pre-amplifier, and a 4-MIPS dedicated processor. The RSC-300 is designed for ROM-less applications that need more ROM space and consequently use off-chip memory. In addition to providing the horsepower needed to perform speech recognition and speech synthesis, the processor has sufficient cycles available for general-purpose product control. The RSC-300/364 Development Kit allows developers to create custom applications. The Development Kit includes an assembler, linker, simulator, hardware development platform, and library of Sensory technology object code. ee General Description Sh from the Interactive Speech The RSC-300/364, a family of t products, is designed specifically for a speech applications in consumer electronic D products. . w The w RSC-300/364 combines an 8-bit processor with neural-net algorithms to provide high-quality 4U t . om c RSC-300/364 Speech Recognition Microcontroller DATA SHEET Features High-Performance Processor 4-MIPS performance at 14.32 MHz 16 general purpose I/O lines Interrupts, timers and counters Fully static operation; clock rate: DC to 14.32 MHz Highly-Integrated Single-Chip Solution Internal 64 kB of ROM (364 only), 2.5 kB of RAM 12 bit A/D (Analog to Digital) converter Microphone Pre-amplifier Internal 32kHz secondary timer 24 x 24 Multiplier Can store 6 Speaker Dependent words onchip TM The highly integrated nature of this chip reduces external parts count. A complete system may be built with only a few passive components in addition to a battery, speaker, and microphone. Low power requirements and low-voltage operation make the RSC-300/364 an ideal solution for battery-powered and hand-held devices. The RSC-300/364 uses a pre-trained neural network to perform speaker-independent speech recognition, while high-quality speech synthesis is achieved using a time-domain compression scheme that improves on conventional ADPCM. Four-voice music synthesis allows multiple, simultaneous instruments for harmonizing. Automatic Gain Control can compensate for people not optimally positioned with respect to the microphone or for people who speak too softly or loudly. w w w .D t a S a e h Low Power Requirements Requires single 2.85V to 5.25V power supply ~10mA operating current at 3V Low Power 32kHz oscillator Power-down current less than 5 µA t e U 4 .c m o High-Quality Recognition and Synthesis Recognition accuracy: better than 97% (Speaker Independent) and 99% (Speaker Dependent). Synthesis data rates from 5,000-15,000 bits per second 4-voice music synthesis capabilities AGC control compensates for variations in input signal Easily Expanded to Larger-Scale Systems Separate 16-bit Address and 8-bit Data buses compatible with common memory components Separate Code and Data address spaces and memory strobes © 2001 Sensory Inc. P/N 80-0165-O w w w .D at Sh a et e 4U . om c 1 RSC-300/364 Data Sheet Table of Contents General Description................................................................................................................................................. 1 Features .................................................................................................................................................................. 1 Table of Contents .................................................................................................................................................... 2 Introduction.............................................................................................................................................................. 3 Rsc-300/364 Hardware Specifications .................................................................................................................... 5 Using the RSC-300/364 .......................................................................................................................................... 6 Memory Organization .............................................................................................................................................. 7 Memory Map............................................................................................................................................................ 8 General Purpose I/O ............................................................................................................................................... 9 Interrupts ................................................................................................................................................................. 9 Reset and Clocks .................................................................................................................................................. 10 Timers and Counters............................................................................................................................................. 11 Power Down and Wake-Up Operation .................................................................................................................. 11 Analog Outputs...................................................................................................................................................... 12 Hardware Debug Features .................................................................................................................................... 12 Design Considerations .......................................................................................................................................... 13 Omni-Directional Microphone................................................................................................................................ 14 Power Consumption and Power Supply Considerations ...................................................................................... 16 Die Bond Pad and QFP Pin Descriptions.............................................................................................................. 17 Die Pad Ring ......................................................................................................................................................... 18 RSC-300/364 Die Bonding Pad Locations ............................................................................................................ 19 Absolute Maximum Ratings................................................................................................................................... 20 D.C. Characteristics .............................................................................................................................................. 20 Vdd vs. Idd............................................................................................................................................................. 20 A.C. Characteristics (External Memory Accesses) ............................................................................................... 21 Timing Diagrams ................................................................................................................................................... 21 RSC-300/364 Instruction Set................................................................................................................................. 22 RSC-300/364 Special Function Register (SFR) Summary ................................................................................... 24 Quality and Reliability............................................................................................................................................ 38 Packaging.............................................................................................................................................................. 40 Ordering Information ............................................................................................................................................. 41 The Interactive Speech™ Product Line ................................................................................................................ 42 2 P/N 80-0165-O © 2002 Sensory Inc. Data Sheet RSC-300/364 Introduction The RSC-300/364 is the newest member in a family of high-performance 8-bit microprocessors featuring a high level of integration, targeted to high-accuracy, low-cost speech recognition applications. The RSC-300/364 is designed to bring accuracy, fast response time and versatility to low-cost, power-sensitive consumer applications. A design goal of the RSC-300/364 was to reduce total system cost while increasing system performance. By including microphone signal amplification, data conversion, recognition and synthesis functionality, and ROM storage (RSC-364 only) with a CPU core on a single chip, dramatic cost and power reductions are achieved. Thus, the RSC-300/364 is able to provide 4 MIPS of integer performance at 14.32 MHz. This allows customer applications to achieve maximum performance at minimum cost. The CPU core embedded in the RSC-300/364 is an 8-bit, variable-length-instruction, microprocessor. The instruction set is most similar to the 8051 family of microcontrollers. The RSC-300/364 processor avoids the limitations of dedicated registers by having completely symmetrical source and destinations for all instructions. Of the 2.5 Kbytes of internal SRAM, 2 Kbytes are organized as a Data Space, and 0.5 Kbytes is for register space. All arithmetic operation instructions may be applied to any register. Any pair of adjacent registers (at an even address) may be used as the 16-bit pointer to either the source or destination for a data