You can find HEX file (TrueTouchBridge.hex) of TT-Bridge tool in PSoC Programmer install path, just program it into PSoC3 is OK, FW is confidential, so we cannot share out.
C:\Program Files (x86)\Cypress\Programmer\TrueTouchBridge.hex
Is it the file you are talking about?
After replacing new MCU, can I just program it with PsoC Programmer software with the hex file?
Yes, that's the hex file i mentioned. After replaced new MCU, program the MCU through J3 10-pin connector. J3 is the program/debug interface of MCU.
Thank you for reply,
How can I connect J3 directly to PC?
I have researched, there are SWD debug kits. Buying a debug kit and new MCU for the MTK board is almost same with buying new MTK. If the only way is to buy a SWD Debug kit to program new MCU, please offer the most economic option.
Another question, Can I program it over USB?
You are right you will need a SWD debug kit and a new MCU, looks an economic option than buy a new MTK, but reworking the old MTK is riskier than buy a new one you know.
No, a brand new MCU can't be programmed over USB.