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GT4 Touch Screens Developer Information

GT4 is Cirque's touch screen platform, optimized for use by secure devices and payment terminals. 

Key Specifications

Core Technology: Cirque custom projected mutual capacitive sensing.
Chipset Cirque Rushmore 1CA037 Analog Front End ASIC
STM32 ARM Cortex M0 48 MHz Microcontroller
Package Details: AFE: 48 pin QFN - 7mm x 7mm x 1mm
MCU: 32 pin QFN - 5mm x 5mm x 0.5mm
Power Supply: 3.3 V (typical)
Power Consumption (AFE): Active Average: 2.05 mA
Idle: 0.5 mA
Sleep: 0.05 µA
Host Interface: I2C
Screen Sizes Supported Up to 7 inches (single AFE)
Contact Cirque for multi-AFE information.
PCI PTS Security Yes with Cirque SecureSense™, verified by independent laboratory review.
SHA256 Firmware Verification.
Countermeasures for overlays and panel removal included.
Signature Capture Forensic quality tethered stylus with palm rejection signing modes.
Touch Tracking Performance True multi-point addressable up to 5 independent points.
Environmental: Operating Temp Range: -40 to 85° C
Storage Temp Range: -40 to 125° C
 
GT4 Logo
 GT4 Implementation Block Diagram

GT4 Implementation Block Diagram

Documentation

General Platform Specification and Details

Firmware Development Documentation

Security Related Documentation

NOTE - Due to their sensitive nature, documents relating to secure implementations require an NDA for release. Please contact Cirque for details. 

  • CTU-GT-160425 Interfacing GT4 to PCI Certified Applications (PDF)
  • GT-150602 SHA256 Firmware Verification (PDF) 

White Papers

NOTE - Due to their sensitive nature, documents relating to secure implementations require an NDA for release. Please contact Cirque for details. 

  • PCI Laboratory Review Report (PDF)
  • GT4 Touch Panel Security Overview (PDF)

Software Tools

TouchTools

TouchTools is a Windows software application that provides a draw window for GT4 touch panels as well as register configuration options. This tool is useful for evaluating GT4 and for testing performance and configuration settings. 

Sample Code