描述 Description

The PCF8537 is a fully featured Liquid Crystal Display (LCD) driver, specifically designedfor high-contrast Vertical Alignment (VA) LCD with multiplex rates up to 1:8. It generatesthe drive signals for any static or multiplexed LCD containing up to eight backplanes,46 segments, and up to 352 elements. The PCF8537 features an internal charge pumpwith internal capacitors for on-chip generation of the LCD driving voltage. To ensure anoptimal and stable contrast over the full temperature range, the PCF8537 offers aprogrammable temperature compensation of the LCD supply voltage. The PCF8537 canbe easily connected to a microcontroller by either the two-line I2C-bus (PCF8537AH) or athree-line bidirectional SPI-bus (PCF8537BH).

特性 Features

Low-power single-chip LCD controller and driver
352 elements allowing to drive:up to 44 7-segment alphanumeric characters
up to 22 14-segment alphanumeric characters
Selectable backplane drive configuration: static, 2, 4, 6, or 8 backplane multiplexing
Software programmable internal charge pump for on-chip LCD voltage generation upto 9 V with internal capacitors
400 kHz I2C-bus interface (PCF8537AH)
5 MHz SPI-bus interface (PCF8537BH)
Programmable temperature compensation of VLCD in four regions
Selectable display bias configuration
Wide range for digital power supply: from 1.8 V to 5.5 V
Wide LCD supply range: from 2.5 V for low threshold LCDs and up to 9.0 V for highthreshold twisted nematic LCDs
Display memory bank switching in static, duplex, and quadruplex drive modes
352-bit RAM for display data storage
Programmable frame frequency in the range of 60 Hz to 300 Hz in steps of 10 Hz;factory calibrated
Integrated temperature sensor with temperature readout
On chip calibration of internal oscillator frequency and VLCD
Manufactured in silicon gate CMOS process

應(yīng)用 Application

White goods
Handheld electronics
Battery operated equipment
Machine control systems
Measuring equipment
Information boards
Panels
Consumer
Industrial
Medical and health care