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Driving liquid crystal displays with the PIC16F913/914/916/917/946

Posted: 10 Sep 2007 ?? ?Print Version ?Bookmark and Share

Keywords:LCD driver module? liquid crystal display? microcontroller?

The PIC16F913/914/916/917/946 microcontroller family provides an integrated LCD Driver module that directly drives LCD displays. In large scale applications, directly driving a custom LCD display can provide significant cost savings. In addition, low-power applications can benefit from the low operating current of a PIC microcontroller compared to stand-alone LCD controllers.

The integrated LCD Driver module generates all of the waveforms needed to drive many different LCD configurations. The bias levels, frequency, and drive scheme are all configurable in software on the PIC microcontroller. The only external inputs required by the LCD module are the bias levels provided at the VLCD1, VLCD2 and VLCD3 pins.

The LCD Driver module directly connects to the segment and common lines of an LCD display. Internally within the LCD Driver module, the bias levels are switched onto the segment and common lines to generate the appropriate output on the LCD. By properly mapping each LCD segment in software based on the common and segment pins it is associated with, the LCD can be manipulated very easily for its particular application.

This application note will describe all of the steps necessary in configuring and operating LCD displays with the LCD Driver module.

Please view the PDF document for more information.




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