Microchip pic16c 8 bit cmos microcontrollers microchip pic16c621a 04iso the pic16cxx family of 8 bit microcontrollers provides the advantages of the enhanced cpu core along with a more powerful array of peripheral features designed to meet the demands of todays mid range 8 bit embedded control applicationsthe enhanced cpu core includes enhancements such as multiple interrupt sources 8 level deep hardware stack and 14 bit wide instruction words microchip pic16c621a 04iso 8 bit microcontr