Datasheet for the Microchip PIC16C925 and PIC16C926 microcontrollers, a 3.27 MB PDF. These OTP or EPROM devices integrate an LCD driver module, so they are found in meters, instruments and appliances with segment displays. The document describes pinouts, the LCD segment and common drivers, analog inputs and electrical characteristics. When a display fails, use it to identify segment and common lines and check the LCD bias supply before suspecting the controller itself.
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