Gt911 Register Map Jun 2026

Selected if the INT pin is driven high while the RST pin transitions from low to high.

Known as the "Ready Flag." A value of 1 indicates that new, valid touch coordinates are present in the buffer. A value of 0 means data is still processing.

Because the GT911 uses 16-bit register addresses, every I2C transaction requires sending the High Byte of the register address first, followed by the Low Byte. Core Register Map Overview

Alex smiled, remembering his own experiences with the chip. He handed the engineer a copy of his documentation and shared some words of wisdom. "The GT911 register map may seem daunting at first, but with patience and practice, you'll master it. Always double-check your work, and never hesitate to seek help when you need it." gt911 register map

What and framework (e.g., Arduino IDE, ESP-IDF, STM32CubeIDE) are you using?

After reading the coordinates from the registers, your code must clear Bit 7 by writing 0x00 back to register 0x814E . If you fail to clear this register, the GT911 will freeze the data buffer and stop updating coordinates. Touch Point Structure

The community reverse-engineered the "Handshake Protocol." They found that during power-up, the state of the Interrupt and Reset pins dictated the I2C address. Selected if the INT pin is driven high

is a popular 5-point capacitive touch controller used extensively in small-to-medium-sized mobile devices and embedded systems. For developers building custom drivers, understanding its register map

For those unfamiliar with the GT911, the register map is a crucial component that defines the chip's configuration and behavior. It's essentially a table that maps addresses to specific functions, allowing the host processor to communicate with the chip. The GT911 register map is divided into several sections, including the configuration registers, data registers, and status registers.

— Product ID ASCII start (e.g., "GT911"). Because the GT911 uses 16-bit register addresses, every

I can provide tailored initialization code or driver logic for your specific setup. Share public link

Once the IC is configured and running, it continuously updates a status buffer when a human finger alters the screen's capacitance. Buffer Status Register (0x814E) This is the most critical register for polling workflows.

Always send two bytes for the register address (High byte then Low byte) before reading or writing data.

Set INT pin Low during Reset.

to release the buffer for the next reading cycle. Common Troubleshooting Tips