The PCA8543 is a peripheral device which interfaces to almost any Liquid Crystal Display
(LCD) with low multiplex rates. It generates the drive signals for any static or multiplexed
LCD containing up to four backplanes, 60 segments, and up to 240 elements. The
PCA8543 is compatible with most microcontrollers and communicates via the two-line
bidirectional I²C-bus. Communication overheads are minimized using a display RAM with
auto-incremented addressing and display memory switching. The PCA8543 features an
internal charge pump with internal capacitors for on-chip generation of the LCD driving
voltages.
