OVERVIEW
LCD Drive is a new feature being introduced with the PSoC 3 / PSoC 5 families. Whereas PSoC 1 devices could only control (or within limited parameters drive) an LCD and thus required an external driver chip, PSoC 3 / PSoC 5 devices can drive an LCD without an external MCU. PSoC 3 / PSoC 5 devices provide single-chip solutions that contain superior and flexible LCD drivers with integrated analog capability.
With PSoC 3 / PSoC 5 LCD Drive Solutions, you can: Drive Up to 16 Commons - Drive complex displays without an external driver
- Drive simple displays with fewer pins
- More pins for peripheral integration
Use PSoC 3 / PSoC 5 Internal Voltage Generator - No need for external resistors or capacitors
- Drive LCDs anywhere in industry-leading 0.5V-5.5V range
Configure LCD Pin Locations - Shorter traces
- Fewer PCB layers
Implement High Level APIs
Easily Debug your Application
Drive Multiple LCDs with one PSoC 3 / PSoC 5 Device - Plenty of commons, segments, and I/Os to drive multiple displays
- Add more product functionality; reduce even more BOM
Configure your LCD with PSoC Creator Software’s Simple GUI
Drive vs. Control Control of an LCD is different than driving an LCD because driving requires specific waveforms. Since PSoC 3 / PSoC 5 devices can create these waveforms using an analog multiplexer, they can now drive LCDs standalone.
This new LCD drive feature makes PSoC 3 / PSoC 5 devices a good fit for applications requiring an LCD because PSoC 3 / PSoC 5 devices now integrate what was a two-chip solution onto a single chip. This means lower BOM costs and higher peripheral integration for the customer.
FEATURES
PSoC 3 / PSoC 5 LCD Segment Drive:
- 2 to 768 pixels or symbols
- Static, 1/3, 1/4, and 1/5 bias supported
- 10 to 150 Hz refresh rate
- Integrated bias generation between 2.0V and 5.2V with up to 128 digitally controlled bias levels for dynamic contrast control
- Configurable low power LCD drivers for long battery life and operation during sleep
- Supports both type A (standard) and type B (low power) waveforms
- Pixel state of the display may be inverted for negative image
- 256 bytes of display memory (frame buffer)
- User-defined pixel or symbol map with optional 7-, 14-, or 16-segment character; 5×7 or 5×8 dot matrix; and bar graph calculation routines
PSoC 3 / PSoC 5 LCD Character Control:
- Implements the industry standard Hitachi HD44780 LCD display driver chip protocol
- Requires only seven I/O pins on one I/O port
- Built in character editor to create user defined custom characters
- Horizontal and vertical bar graphs
PSoC 3 / PSoC 5 Static LCD Segment Drive:
- 1 to 61 pixels or symbols
- 10 to 150 Hz refresh rate
- User-defined pixel or symbol map with optional 7 segment, 14 segment, 16 segment and bar graph calculation routines
COMPONENT DATASHEETS:
LCD Segment Drive
LCD Char Drive
LCD Static Seg Drive
APPLICATION NOTES:
LCD Direct Drive Basics - AN52927
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