SPC21A1

SPC21A1 20KB SOUND CONTROLLER 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. The power savings mode saves the RAM contents, but freezes the oscillator, causing all other chip functions to be inoperative. The Max. CPU clock frequency is 6.0MHz. It has an Instruction Cycle Rate of 2 clock cycles (min.) – 6 clock cycles (max.). The SPC21A1 includes, not only the latest technology, but also the full commitment and technical support of Sunplus. 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 www.DataSheet4U.com BLOCK DIAGRAM 8-bit microprocessor 20K-byte ROM Two Timers TimeBase INT control 64-byte SRAM One 8-bit D/A (current) XI CLK OSC Low Voltage Reset AUD 10 PINS...