4-Wire and 8-Wire Resistive Touch-Screen Controller Using the MSP430 (Rev. A)
This application report describes how to use an MSP4309(tm) microcontroller to drive and read a resistive touch screen. The hardware and software solutions provided enable the reading of user input through a 4-wire or 8-wire resistive touch screen with a low-cost low-power customizable microcontroller. The reference design includes MSP430 software and hardware schematics along with a demonstration PC application. The design was implemented using an MSP430F2012, but it can easily be modified to use any other MSP430 with an ADC.