Gt911 Register Map Jun 2026

This is the most frequently accessed area. The register at 0x814E acts as a traffic controller; its "Buffer Status" bit signals to the CPU when new touch data is ready. Following this, a series of coordinates (X/Y) and track IDs for up to five simultaneous touch points are stored in sequential memory locations. 2. The Protocol of Interaction

Contains the number of active touch points (bits 0-3) and whether a touch is currently active (buffer status). Point 1 Data

If monitoring the screen via hardware interrupts, wait for the INT pin to toggle. If polling: Read register 0x814E .

The GT911 supports two distinct 7-bit slave addresses. The active address is determined dynamically during the by manipulating the state of the Reset (RST) and Interrupt (INT) pins: gt911 register map

Contains the version number of the configuration file. The chip will reject configuration writes if this value is lower than or equal to the current version in its internal flash, unless forced.

Contains real-time touch information (x/y coordinates, touch IDs). Key Register Address Ranges 0x8047 – 0x80FF : Configuration Region (Read/Write) 0x8100 – 0x813F : Coordinate Data Region (Read Only) 0x8140 – 0x814E : Product ID and Information (Read Only) 2. Detailed Breakdown of Key Registers

The GT911 is a workhorse, but its register map is surprisingly straightforward once you know where to look. You don’t need a full driver library—just 8-10 register addresses and proper I2C handling. This is the most frequently accessed area

Yes, if you like your peripherals cheap, responsive, and full of character. No, if you want a register map that holds your hand.

Used to trigger actions like sending data or calibrating.

Are you trying to or just trying to get the first touch coordinates to show up? GT911 Programming Guide - Orient Display If polling: Read register 0x814E

But here is the trap: , and 0x80FF is the Refresh Flag .

Let’s pull back the curtain and map out the GT911’s internal memory.

High bit (bit 7) indicates if new touch data is available. Lower bits indicate number of touch points. Touch Data Registers

The GT911 register map consists of 256 registers, each 8 bits wide. The registers are divided into several sections, including: