[Sunplus Technology Co., Ltd.]

GENERAL DESCRIPTION
The SPC21A1 is a CPU based two-channel speech/melody synthesizer including CMOS 8-bit microprocessor with 69 instructions, 20K-byte ROM for speech and melody data (Speech is compressed by a 4-bit ADPCM with approx. 6 sec speech duration @ 7KHz sampling rate) and 64-byte working SRAM. It includes two Timer/Counters, 10 Software Selectable I/Os, and one 8-bit current D/A output. For audio processing, melody and speech can be mixed into one output. It operates over a wide voltage range of 2.4V - 5.5V and includes Low Voltage Reset function. The Low Voltage Reset automatically resets when the working voltage is less than 2.2V. In addition, SPC21A1 has a Clock Stop mode for power savings.

FEATURES
■ 8-bit microprocessor
■ Provides 20K-byte ROM for program and audio data
■ 64-byte working SRAM
■ Software-based audio processing
■ Wide operating voltage: 2.4V – 3.4V @ 4.0MHz
                                          3.6V – 5.5V @ 6.0MHz
■ Supports Rosc only
■ Max. CPU clock: 4.0MHz @ 3V, 6.0MHz @ 5V
■ Standby mode (Clock Stop mode) for power Savings. Max. 2A @ 5V
■ 500ns instruction cycle time @ 4.0MHz CPU clock
■ Provides 10 general I/Os
■ Two 12-bit timer/counters
■ 6 INT sources
■ Key wake -up function
■ Approx. 6 sec speech
   @ 7KHz sampling rate with ADPCM
■ One D/A output
■ Low Voltage Reset

APPLICATION FIELD
■ Intelligent education toys
   Ex. Pattern to voice (animal, car, color, etc.)
      Spelling (English or Chinese)
      Math
■ High end toy controller
■ Talking instrument controller
■ General speech synthesizer
■ Industrial controller