This demoboard, developed through a partnership with Truly Semiconductors Ltd,

showcases touch-sensitive display technology that enhances user experiences and lowers

overall cost in industrial, medical, and consumer applications.

NXP in-cell touch

display demo with

PCF8576E &

PCF8885

Segmented 4 x 40 display with in-cell

touch technology

KEY FEATURES

` Twisted Nematic (TN) display with 56 display elements and

5 touch buttons, designed and manufactured by Truly

` In-cell ITO touch layer

` LCD driver PCF8576E

- Bare die with bumps for COG applications

- Resolution: 4 x 40

` Capacitive sensor PCF8885

- TSSOP28 package

- Eight sensor channels

APPLICATIONS

` Industrial

- Small appliances

- White goods

- Measuring equipment

- General-purpose displays

` Medical

- Blood pressure meters

- Blood glucose meters

- Digital thermometers

` Consumer

- Entertainment devices

- Healthcare devices

The in-cell touch display demo makes it easy for engineers to

experiment with the latest technologies for touch-sensitive

passive LCD.

The demo highlights the features of the NXP Chip-on-Glass (COG)

LCD driver PCF8576E and the capacitive sensor PCF8885. The

PCF8576E requires no external components to generate the drive

signals for the LCD, and supports up to four backplanes and

40 segment drivers. The PCF8885, which offers adjustable

response times and continuous auto-calibration, provides dynamic

touch sensing with eight sensor channels. Both devices use the

avoiding any interference between the LCD driving signals and the

cap sensor signals, thus enabling the in-cell touch technology with

no need for expensive and complicated solutions.