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NXP PCA85133通用LCD驅動方案
NXP
摘要: NXP 公司的PCA85133是單片LCD控制器和驅除器,低復接速率的通用LCD驅動器,能產生任何靜態驅動信號,或復接多達4個背板或多達80段的LCD,并很容易級聯以適應更大LCD應用.
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     NXP 公司的PCA85133是單片LCD控制器和驅除器,低復接速率的通用LCD驅動器,能產生任何靜態驅動信號,或復接多達4個背板或多達80段的LCD,并很容易級聯以適應更大LCD應用. PCA85133可選擇的幀頻率為82Hz或110Hz,工作電壓從1.8 V 到5.5 V,400 kHz I2C總線接口.本文介紹PCA85133主要特性,方框圖, 典型系統配置和級聯PCA85133配置圖.

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



圖1.PCA85133方框圖

圖2. PCA85133典型系統配置

圖3. 級聯PCA85133配置圖
 

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