Can you provide a responsiveness speed guarantee for time sensitive applications (i.e. time for a button press to be detected and sent to the RS-232 port)?
Detection time depends on user-adjustable touch parameters. Factory settings recognize touches in around 20ms. The corresponding serial response sends immediately if no commands are being executed. However, there is no guarantee since the screen could be performing some command when the unit is touched. The evaluation kit unit has a very responsive keyboard demo. However, the ultimate response time depends on how the unit is used.