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TMDSEMU110-U: Can I debug with only 4PIN?

Part Number: TMDSEMU110-U
Other Parts Discussed in Thread: TMS320F280049C

I have a question.
First, let me explain the situation.
The target is TMS320f280049C, and the four open pins for debugging are VCC, 3.3V, TMS, TCK, and GND. The pins 100 and 1, which are TDO and TDI, are already set to SCIARX and SCIATX from ROM. I tried switching the wiring to SCIARX,SCITX and connecting to TDI,TDO, JTAG scan was ok, but when I press the debug button, it says it is in low power mode and cannot connect, do you want to wake it up, and if I say yes, it says it could not connect.

I heard that I can program it by changing SCIARX,SCIATX back to original and using "C2PROG". I can't figure it out. Is it possible to debug without connecting TDI,TDO for debugging?
[C2Prog] has a function to connect to GDB. Can't the scripts with the debug button be executed at this time? If I need to run it, do I need to skip writing to flash?
Can I connect to the GDP server from the C2Prog without pressing the debug button and with the screen display set to debug? Can I debug?
This is my first time using this type of connection, so I am not sure.