Understanding this map is essential for developers writing custom drivers or troubleshooting touch response issues in embedded systems.

This register is used to trigger specific device states. Common commands include: 0x00 : Read coordinate status. 0x05 : Enter to save power. 0x06/0x07 : Enter/Exit Charge mode for enhanced sensitivity. Configuration Registers (0x8047+)

The register map is divided into three primary functional areas: Address Range Access Type Description Command Register Write Only Sends high-level commands like Sleep or Calibration. 0x8047 – 0x8100 Configuration Registers Read/Write

This block is often sent as a complete "config array" during initialization. 3. Register Map

Defines screen resolution, touch thresholds, and sensor layout. Coordinate/Status Registers

The GT911 operates as an I2C slave. Before accessing the register map, you must establish the correct slave address.

The GT911 uses 16-bit register addresses. It supports auto-incrementing , allowing you to read or write a continuous block of data in a single I2C transaction. 2. Core Register Map Structure

Contains the touch point status and X/Y coordinates for up to 5 points. Command Register (0x8040)