Unlike most resistive touch screen controllers, the BU21028FV-M 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.
standard 4-wire resistive touch screens Single and dual touch detection I²C-like interface (for the host processor I/F) 12-bit resolution Single 2.7V to 3.6V power supply Auto power down/on control Built-in clock oscillator circuit