MICROCHIP PIC16F870/871 28/40-Pin 8-Bit CMOS FLASH Microcontrollers handbook
Datasheet
This document introduces a microcontroller product from Microchip Technology Inc. The product features a high-performance RISC CPU, 35 single-word instructions, single-cycle instruction execution (except for program branches which require two cycles), 2K x 14 words of FLASH Program Memory, 128 x 8 bytes of Data Memory (RAM), 64 x 8 bytes of EEPROM Data Memory, and more.