LCD DriverPCF8562TT

 

Liquid Crystal Display (LCD) is observed and seen everywhere. From homes to offices, they are popular throughout the world. An ample amount of time was taken to develop this innovative technology, first accidentally invented in 1888 by Friedrich Reinitzer, an Austrian botanist. However, formally being developed in 1968 by the RCA Corporation. PCF8562TT is used to drive these LCDs by driving segments or dots so that LCDs operate without any signal contention being instructed by the microcontroller and prevents matrix damage. In other words, PCF8562TT provides an interface between the microcontroller or microprocessor and the LCD by I2C bus.


 

 

Why use PCF8562TT?

PCF8562TT is a device that can be used with any type of LCD. It has low multiplex rates and can also be used for the LCDs having backup planes of up to 4 and segments of up to 32. The aforementioned is well-suited with almost every microcontroller and uses I2C serial communication as well as accepts data and commands using this interface and displays the desired image by generating a suitable signal having time, voltage, or current modulations with time. It is comprised of static as well as duplex drive modes. PCF8562TT is a 48-pin TSSOP48 package, having a width of 6.1mm, the PCF8562TT provides maximum features in one unit. The product is accredited to NXP Semiconductors N.V.

 

Workings of the PCF8562TT Driver:

There are many micro-sized units in an LCD. Each unit is composed of liquid crystal, electrodes, and polarizers. An alternating voltage is driven across the electrodes such that the net alignment on average is zero. The unit glows when the RMS voltage across the electrode is greater than the unit’s threshold voltage. The LCD driver serves this purpose by controlling the voltage according to the desired data, image, or characters to light up respective units. For this purpose, it also incorporates RAM to store data and analyze it.  The functioning of the module maintenance of the I2C bus is performed by the host microcontroller. The oscillator is controlled externally and biasing voltage is generated internally by using an internal voltage divider. Mode set command is used to select the LCD voltage.

 

Features:

A single chip LCD driver and controller along with a backplane drive and displays bias configuration selection. PCF8562TT also incorporates RAM, flash memory, or EEPROM and is capable to drive 32 segments up to sixteen seven segmented numeric, and up to eight fourteen segmented alphanumerics. Additionally, this driver can drive any 128 element graphic and incorporates 32x4 bit of RAM for data storage along with multipurpose modes of blinking with an operating voltage that ranges from 1.8 Volts to 5.5 Volts while exhibiting low power consumption. Further, its I2C interface rests at 400 kHz. The product is manufactured in the CMOS process. The module is helping in reducing the dependency on external components as the biasing voltage is generated by using internal circuitry. Frequency blinker is used to ensure versatile display blinking capability.

The module is offering benefits to both the manufacturers and the user. The product is manufactured by the Silicon gate CMOS technology ensuring the lowest cost and the lowest power consumption. The gate technology is easily available for the manufacturers.

 

Some other indispensable features include a Power-on reset, LCD bias generator, LCD voltage selector, dual modes, internal and external oscillators. PCF8562TT serves its purpose extraordinarily. Further details of this driver are mentioned in the respective datasheet. Do ensure you contact Amaxchip for your desired service that is one click away from you to update to the latest technology.

 

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