Are you using a custom board, if so can you post schematic ?
Are you sequencing supplies to the board and its peripherals properly ?
Or are you using a CY8C38KIT-030 ?
When the miniprog is attached to the PSoC3 a power-down and up again may lead to undesirable halts and the program not starting. Detach the miniprog3 first and with a power-up the PSoC should run.
Thanks you for your replys.
I clicked on "verify answer " but it's a mistake done by me! Sorry, the answer doesn't verified =S
I'm testing your propositions and I will go back.
Thank you Bob Marlowe and Dana for your replies.
I have located my mistake. I didn't connect a condenser of 1µF on the pin VCCA of the analog regulator out.
Good to hear from you that your issue is solved!