Unlike most resistive touch screen controllers, the BU21029GUL 4-wire resistive touch-screen controller can generate data that enables dual touch detection. The Host processor can use this data to detect single and dual point coordinates.
Single and dual touch detection for standard 4-wire resistive touch screens I²C-like interface for interfacing with the host processor 12-bit resolution Single 1.65V to 3.60V supply Power on reset Auto power down control Built-in clock oscillator circuit