Make sure that the reset pin and the power supply pin are correctly connected.
Please share the schematic if possible.
Thank you for your comment.
We could solve the problem by ourselves.
I found that PSoC 3 CY8C3866LTI-068(48pin) needs to enable reset pin by PSoC Creator and Miniprog3 port setting change to JTAG mode from SWD. I could download it. Sorry, only software setting is wrong.
I'm happy to hear that!
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