The PCF8536 is a peripheral device which interfaces to almost any Liquid Crystal Display
(LCD) with low multiplex rates. It generates the drive signals for any multiplexed LCD
containing up to eight backplanes, up to 44 segments, and up to 320 elements. The
PCF8536 is compatible with most microcontrollers and communicates via the two-line
bidirectional I²C-bus (PCF8536AT) or a three line unidirectional SPI-bus (PCF8536BT).
Communication overheads are minimized using a display RAM with auto-incremented
The PCF8536 features an on-chip PWM controller for LED illumination. Up to six
independent channels can be configured. Each channel has 128 levels allowing the
possibility for two RGB controllers. Each of them provides over 2 million colors. Each
channel can also be used for static drive.