Hi Scott, I'd recommend reading through the 4-Wire and 8-Wire Resistive Touch-Screen Controller Using the MSP430 app note, since it discusses exactly what you're wanting to do. More specifically, Section 2.2 Detecting a Touch With the MSP430 talks about how to use a high-to-low interrupt on a GPIO pin (using the connections shown in Figure 6 ) to wake up the MSP430 from LPMx. Here are two more resources that may be helpful for your application: Using Resistive Touch Screens for Human/Machine Interface app note (discusses different configurations and an acquisition flowchart) TI Touch Screen Controllers Now, looking at your application at a higher level, have you heard about our CapTIvate technology? It can provide a very low power consumption and a very strong noise-immunity touch solution. More information can be found in the Getting Started With MSP MCUs With CapTIvate guide and our online CapTIvate Technology Guide . Perhaps, you could use CapTIvate's wake-on-proximity feature instead of the resistive touch screen. Check out our Touch Through Glass with Sharp ® LCD Reference Design . Hope this helps! Regards, James MSP Customer Applications
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