PCF85133 Datasheet, PDF(1/41 Page) NXP Semiconductors – Universal LCD driver for low multiplex rates

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PCF85133 Datasheet, PDF (1/41 Pages) NXP Semiconductors – Universal LCD driver for low multiplex rates

PCF85133

Universal LCD driver for low multiplex rates

Rev. 1 â 17 February 2009

Product data sheet

1. General description

The PCF85133 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 and up to 80 segments and can easily

be cascaded for larger LCD applications. The PCF85133 is compatible with most

microprocessors or microcontrollers and communicates via a two-line bidirectional

I2C-bus. Communication overheads are minimized by a display RAM with

auto-incremental addressing, by hardware subaddressing and by display memory

switching (static and duplex drive modes).

2. Features

I Single-chip LCD controller and driver

I Selectable backplane drive conï¬guration: static or 2, 3 or 4 backplane multiplexing

I Selectable display bias conï¬guration: static, 1â2 or 1â3

I Selectable frame frequency: 82 Hz or 110 Hz

I Internal LCD bias generation with voltage-follower buffers

I 80 segment drives:

N Up to 40 7-segment numeric characters

N Up to 21 14-segment alphanumeric characters

N Any graphics of up to 320 elements

I 80 Ã 4 bit RAM for display data storage

I Auto-incremental display data loading across device subaddress boundaries

I Display memory bank switching in static and duplex drive modes

I Versatile blinking modes

I Independent supplies possible for LCD and logic voltages

I Wide power supply range: from 1.8 V to 5.5 V

I Wide LCD supply range for low-threshold LCDs, for guest-host LCDs and

high-threshold (automobile) twisted nematic LCDs: from 2.5 V to 6.5 V

I Low power consumption

I 400 kHz I2C-bus interface

I May be cascaded for large LCD applications (up to 5120 elements possible)

I May be cascaded with PCF8532 to gain more ï¬exibility in the number of addressable

segments

I No external components

I Compatible with Chip-On-Glass (COG) technology

I Manufactured using silicon gate CMOS process

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