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PDA 05 5/30/03 11:35 AM Page 67
Chapter 5 / The Electronics
The software running on the PDA utilizes all the optional and required
protocols supported by the MCP2150 (see Chapters 8 and 9).
Figure 5.25 shows the IrDA data protocol stack and which components
are implemented by the MCP2150. The optional IR transceiver for the
asynchronous serial IR is the Vishay transceiver described earlier.

Physical Signal Layer (PHY). The MCP2150 provides the following
Physical Signal Layer specification support:
• Bidirectional communication.

• Data Packets are protected by a CRC—16-bit CRC for speeds up
to 115.2 kbaud.

• Data Communication Rate—9600 baud minimum data rate.

Figure 5.25
MCP2150 IrDA
protocol stack.

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