Microchip datasheet for the PIC12F629 and PIC12F675, 8-pin flash microcontrollers, in a 4.81 MB PDF. The PIC12F675 adds an analog-to-digital converter, and the document covers pinout, oscillator calibration, configuration words, electrical characteristics and the instruction set. Technicians use it to identify power, MCLR and ICSP pins when reading or rewriting firmware with a PIC programmer. These chips store an oscillator calibration value that an erase can wipe, so note it down or back up the full memory before reprogramming.
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