The TWRPI-KEYPAD capacitive touch keypad plug-in for the NXP® Tower® System lets you add keypad functionality to your embedded designs. This plug-in, or daughter card, is compatible with Tower System modules that feature touch pad Tower plug-in sockets. Simply place the TWRPI-KEYPAD onto a parent controller or peripheral module, and start prototyping quickly and easily. It's that simple and, quite literally, at your fingertips.