2025-09-27 2:11 AM
2025-09-27 4:45 AM
Hello @PhamHung and welcome to the community,
What MCU part number are you using? and which board?
2025-09-27 6:59 AM
Pretty sure this happens when you use some counterfeit programmers.
2025-09-27 7:27 AM
Try connect with Cubeprogrammer, then show, what it's telling.
Set: software reset, connect normal.