GENERAL DESCRIPTION

The PCF8812 is a low power CMOS LCD controller driver, designed to drive a graphic display of 65 rows and 102 columns. All necessary functions for the display are provided in a single chip, including on-chip generation of LCD supply and bias voltages, resulting in a minimum of external components and low power consumption. The PCF8812 interfaces to microcontrollers via a serial bus interface.

FEATURES

? 65 row and 102 column outputs

? Display data RAM 65 × 102 bits

? On-chip:

– Configurable 5 (4, 3 and 2) voltage multiplier generating VLCD (external VLCD also possible)

– Generation of intermediate LCD bias voltages

– Oscillator requires no external components (external clock also possible).

? External reset input pin

? Serial interface maximum 4.0 Mbit/s

? CMOS compatible inputs

? Mux rate: 1 : 65

? Logic supply voltage range VDD1 to VSS:

– 2.5 to 5.5 V.

? High voltage generator supply voltage range VDD2 to VSS and VDD3 to VSS

– 2.5 to 4.5 V.

? Display supply voltage range VLCD to VSS: – 4.5 to 9.0 V.

? Low power consumption, suitable for battery operated systems

? Temperature compensation of VLCD

? Temperature range: Tamb = ?40 to +85 °C

? Slim chip layout, suited for Chip-On-Glass (COG) applications.

2 APPLICATIONS

? Telecom equipment.