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PDA 04  5/27/03  8:27 AM  Page 30
                          Figure 4.1
                          PDA Robot’s IR             PDA Robotics
                          transceiver next to
                          an iPAQ 3850.


















                          protocol, PDABot uses a Microchip MCP2150, (see Figure 4.2) an IrDA
                          standard protocol stack controller, and a Vishay Telefunken TFDS4500
                          serial infrared transceiver (SIR 115.2 kb/s).

                          A widely used protocol that most devices using IR adhere to is IrDA.
                          Both Palm OS and Windows have incarnations of IrDA, which will be
                          explained in detail in Chapter 8: PDA Robot PalmOS Software Using
                          Code Warrior 8 and Chapter 9: PDA Robot Software for Pocket PC 2002
                          (Windows CE).

                          IrDA is an international organization that creates and promotes inter-
                          operable,  low-cost  IR  data  interconnection  standards  that  support  a
                          walk-up,  point-to-point  user  model.  The  Infrared  Data  Association


                          Figure 4.2
                          MCP2150 block
                          diagram.
















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