Goodix Touch IC GT928 10-Point Capacitive Touch Chips

1.Product Overview

GT928 is a new generation of 10-point capacitive touch solution specially designed for 7”-10.1”, with 32 driving channels and 24 sensing channels to meet higher touch precision requirements. GT928 can identify the real-time and accurate position, movement track and touch area of 10 touch points at the same time. And according to the requirements of the main control, the touch information of the corresponding points can be read.

2. Features

 Built-in capacitance detection circuit and high-performance MPU

•  Touch scanning frequency: 100Hz
• Real-time output of touch point coordinates
• Unified software version is suitable for capacitive screens of various sizes
• Single power supply, built-in 1.8V LDO
• Flash process, support online programming
• HotKnot function

 Capacitive screen sensor

• Detection channel: 32 (drive channel) * 24 (sensing channel)
• Capacitive screen size range: 7”~10.1”
• Support FPC button design
• Support both ITO glass and ITO Film
• Cover Lens thickness support: 0.55mm≦glass≦2mm, 0.5mm≦acrylic≦1.2mm
• Built-in frequency hopping function, support OGS full fit

 Hot Knot

• Transmission speed: 7.0Kbps(max)
• Maximum capacity of data frame: 128 byte
• Applicable sensor type: OGS/traditional GFF/GG/GF

 Environmental adaptability

• Initialize automatic calibration
• Automatic temperature drift compensation
• Working temperature: -40℃~85℃, humidity: ≦95%RH
• Storage temperature: -60℃~125℃, humidity: ≦95%RH

 Communication interface

• Standard I2C communication interface
• Slave working mode
• Support 1.8V~3.3V interface level

 Response time

• Green mode: <48ms
• Sleep mode: <200ms
• Initialization: <200ms

 Power supply voltage:

• Single power supply: 2.8V~3.3V

 Power supply ripple: Vpp≦50mV
 Package: 68 pins, 8mm*8mm QFN_0.4P
 Application development support tools

• Touch screen module parameter detection and automatic generation of configuration parameters
• Touch screen module performance comprehensive test tool
• Module mass production test tool
• Main control software development reference driver code and document guidance

3. Application