ADAPTABLE DIGITAL PEN AND TOUCH SENSITIVE DEVICE

Methods and apparatuses are provided that address interoperability limitations of current digital pens and touch sensitive devices. In aspects, methods are provided for operating an adaptable digital pen and touch sensitive device to determine the best means for pen state information such as pressure information to be transferred from the pen to the device. A digital pen includes multiple communication interfaces to permit wide compatibility with touch sensitive devices. A communication interface is provided that enables the digital pen to communicate via an active pen protocol with a digitizer of the touch sensitive device while operating in a first mode. Another communication interface is provided as an alternative channel for communicating pen state information to the touch sensitive device while operating in a second mode. Where neither such interface suffices for communicating pen state information to the touch sensitive device, the digital pen may operate in a reflective capacitive mode.