No Autobaud detected on RXD pin of CP2102 (USB-to-UART Bridge)

[FrankWu]

Hello:

I use the circuit the same as Keil MCB950 board. When I use oscilloscope to probe RXD of CP2102 after running flashmagic Read Device Signature. There is on "U" character timing on this pin. I have made sure the com port in cotrol panel an checking the com setup in flashmagic ok. Any possible problems could be?

Best Regards,
Frank

[Andy Ayre]

Test the communication path from your PC to the microcontroller using Hyperterminal.

Andy

[FrankWu]

Dear Andy:

I have found the answer. The pin assignments of PLCC 44pin and LQFP 44pin  for LPC are different. I use the PLCC pin assignment in design and LQFP in PCB. So it cause the problem.
ISP is working now, thank you!

Best Regards,
Frank