描述 Description

The GPC21A3 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 @ 6KHz 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 - 5.1V and includes Low Voltage Reset function. The Low Voltage Reset automatically resets when the working voltage is less than 2.2V. In addition, GPC21A3 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 GPC21A3 includes, not only the latest technology, but also the full commitment and technical support of Generalplus.

特性 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 - 3.6V @ 4.0MHz 3.6V - 5.5V @ 6.0MHz
? Supports ROSC only
? Max. CPU clock: 4.0MHz @ 2.4V - 3.6V 6.0MHz @ 3.6V - 5.5V
? Standby mode (Clock Stop mode) for power savings. Max. 2μA @ 5.0V
? 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 @ 6KHz sampling rate with 4-bit ADPCM
? One D/A output
? Low Voltage Reset