Gt911 Register Map < 2026 Edition >

0x8150 / 0x8151 : Low and high bytes combining into a 16-bit integer for the absolute .

0x05 : – Forces the touch controller to recalibrate its capacitive baseline capacitance array to account for structural changes, moisture, or glass temperature shifts.

for reading coordinates from a specific platform like Arduino or STM32? gt911 register map

The version identifier of your custom configuration array. Set this to a value greater than 0 .

: Used in conjunction with 0x8040 to activate the chip's electrostatic discharge (ESD) protection mechanism. A common sequence is writing 0xAA to 0x8040 and then regularly verifying its value to ensure robust ESD resilience. 0x8150 / 0x8151 : Low and high bytes

After reading all touch points, always write 0x00 back to 0x8009 . If you fail to do this, the GT911 will stop sending interrupts.

The configuration zone dictates how the touch controller behaves, including resolution, touch thresholds, interrupt modes, and power management. Key Configuration Fields The version identifier of your custom configuration array

Write 0x00 directly to 0x8140 to release the I2C pipeline and prepare the controller for the next scanning cycle.

If you’ve ever worked with cheap resistive touch screens, you know the pain of calibration matrices and wobbly readings. Enter the —a capacitive touch controller so common, it’s practically the 555 timer of the touch world. But a microcontroller is only as good as its datasheet, and my word , the GT911 register map is a story in itself.

The GT911 registers are 8-bit wide, addressed by a 16-bit value starting from 0x8000 . The memory map can be divided into three main sections:

Let's break down the purpose of each register group.