 XAP4 was designed for use in modern ASIC or microcontroller applications capable of processing real-world data captured by an analog-to-digital converter (ADC) or similar sources.The processor's 16-bit integer word supports the precision of most ADCs without carrying the overhead of a 32-bit processor.XAP4 also offers a migration path from 8-bit processors, such as 8051, in applications that need increased performance and program size, but cannot justify the cost and overhead of a 32-bit processor.