how can i communicate between my pc & lpc2368?? dose it have any special circuit??
No, it's just a processor.
But add level converters to one of the four UART:s and it can talk RS-232.
Add Ethernet electronics and it can do TCP/IP.
Add USB hardware and it can do USB.
Add CAN hardware to PC and 2368, and let them communicate using CAN.
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Exactly how much of the user manual for the procesor have you read? I think you need to read a bit more.