Learning to program with MCB-STR9 Evalution board by uVision3. HOW TO DO?

I'm pretty sure the processor will run fine without decoupling capacitors.

The current consumption is tiny. And it has an internal RC oscillator that is less sensitive than an external crystal. And it has quite a bit of safety margin on the supply voltage.

The issue with it is that it has no reset circuit, so it will fail when power is slowly going down or is having a short dip.

Note that "as a professional" doesn't apply to hobbyists. Good methodology can apply. How to try to design and document before starting to write code can work. But there are often a much different priority between money and saved own time. 10 extra hours looking for problems can be a better choice than paying $50 - because the real alternatives may be 10 hours searching for troubles or not doing anything at all.

I'm pretty sure the processor will run fine without decoupling capacitors.

The current consumption is tiny. And it has an internal RC oscillator that is less sensitive than an external crystal. And it has quite a bit of safety margin on the supply voltage.

The issue with it is that it has no reset circuit, so it will fail when power is slowly going down or is having a short dip.

Note that "as a professional" doesn't apply to hobbyists. Good methodology can apply. How to try to design and document before starting to write code can work. But there are often a much different priority between money and saved own time. 10 extra hours looking for problems can be a better choice than paying $50 - because the real alternatives may be 10 hours searching for troubles or not doing anything at all.