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