Before executing your configuration routine, query the product ID registers to verify stable I2C communication and confirm that the connected hardware is an authentic Go to product viewer dialog for this item.
The GT911 register map is essential for a wide range of applications, including:
E.g., 0x00 0x03 (320 pixels) or 0x00 0x04 (480 pixels). 0x804A-0x804B (Resolution Y): Defines Y-axis resolution. gt911 register map
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
The chip periodically updates coordinate data. is a popular 5-point capacitive touch controller used
Below is the definitive register map for the GT911. All addresses are 16-bit. Note: The GT911 uses Big-Endian (MSB first) for multi-byte values.
Bit-shift the coordinate values: X = (High_Byte << 8) | Low_Byte . All addresses are 16-bit
Understanding this map is essential for developers writing custom drivers or troubleshooting touch response issues in embedded systems.
Read 0x8140 to 0x8144 to verify I2C communication. A returned "911" confirms you're talking to the right chip.
bit7 indicates if data is ready to be read; lower bits show the number of touch points. Point 1 X-Low