PDF datasheet for the Microchip PIC16F628 flash microcontroller, 1.68 MB in size. It describes the pin functions, internal oscillator, comparators, USART, timers…

Microchip PIC16F62x datasheet, a 4.09 MB PDF covering the 18-pin flash microcontroller family that includes parts such as the PIC16F627 and PIC16F628.