原标题：NXP PCA85133通用LCD驱动方案

　　nxp 公司的PCA85133是单片LCD控制器和驱除器,低复接速率的通用LCD驱动器,能产生任何静态驱动信号,或复接多达4个背板或多达80段的LCD,并很容易级联以适应更大LCD应用. PCA85133可选择的帧频率为82Hz或110Hz,工作电压从1.8 V 到5.5 V,400 kHz I2C总线接口.本文介绍PCA85133主要特性,方框图, 典型系统配置和级联PCA85133配置图.

　　PCA85133: Universal LCD driver for low multiplex rates

　　The PCA85133 is a peripheral device which interfaces to almost any Liquid Crystal Display (LCD)1 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 PCA85133 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).

　　AEC-Q100 compliant for automotive applications.

　　PCA85133主要特性:

　　Single-chip LCD controller and driver

　　Selectable backplane drive configuration: static, 2, 3, or 4 backplane multiplexing

　　Selectable display bias configuration: static, 1¤2, or 1¤3

　　Selectable frame frequency: 82 Hz or 110 Hz

　　Internal LCD bias generation with voltage-follower buffers

　　80 segment drives:

　　Up to 40 7-segment alphanumeric characters

　　Up to 21 14-segment alphanumeric characters

　　Any graphics of up to 320 elements

　　80´4 bit RAM for display data storage

　　Auto-incremental display data loading across device subaddress boundaries

　　Display memory bank switching in static and duplex drive modes

　　Versatile blinking modes

　　Independent supplies possible for LCD and logic voltages

　　Wide power supply range: from 1.8 V to 5.5 V

　　Wide LCD supply range for low-threshold LCDs, for guest-host LCDs, and high-threshold (automobile) twisted nematic LCDs: from 2.5 V to 8.0 V

　　Low power consumption

　　400 kHz I2C-bus interface

　　Compatible with 4-bit, 8-bit, or 16-bit microprocessors or microcontrollers

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

　　No external components needed

　　Compatible with Chip-On-Glass (COG) technology

　　Manufactured using silicon gate CMOS process

　　图1.PCA85133方框图

　　图2. PCA85133典型系统配置

　　图3. 级联PCA85133配置图