Author Topic: No Autobaud detected on RXD pin of CP2102 (USB-to-UART Bridge)  (Read 3546 times)

FrankWu

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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

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Re: No Autobaud detected on RXD pin of CP2102 (USB-to-UART Bridge)
« Reply #1 on: May 06, 2010, 09:04:27 am »
Test the communication path from your PC to the microcontroller using Hyperterminal.

Andy
Embedded Systems Academy, Inc.
support at esacademy dot com

FrankWu

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Re: No Autobaud detected on RXD pin of CP2102 (USB-to-UART Bridge)
« Reply #2 on: May 13, 2010, 05:50:29 pm »
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