Architecture for communication of remote devices to a digitizing display

A data processing architecture for a pen-based computing system comprising:

• a stylus which includes a pressure sensing transducer and a X-Y position sensing transducer;
• said pressure sensing transducer coupled to a multiplexer and said X-Y position sensing transducer also connected to said multiplexer;
• a transmitter in said stylus having an input connected to said multiplexer, for transmitting a multiplexed data stream of information representing contact pressure applied to said pressure transducer and X-Y information representing the position of the stylus;
• said system further comprising a digitizing display which includes an electrostatic tablet which radiates electromagnetic radiation which is detected by said X-Y position sensing transducer in said stylus;
• a receiver located proximate said electrostatic tablet in said pen-based computer system, for receiving a multiplexed data stream transmitted from said stylus;
• whereby an event of contacting said pressure transducer on the surface of said electrostatic tablet and establishing an X-Y position of said stylus with respect to said electrostatic tablet are transmitted from said stylus to said receiver;
• a second transmitter in said digitizing display, in said pen-based computer system, for transmitting information to said stylus;
• a second receiver in said stylus, for receiving information from said second transmitter in said digitizing display;
• and
• a utilization device in said stylus, coupled to said second receiver, for using information received from said digitizing display.