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.