Cannot write program to STM32WB55CG

[ASiva.1]

I am using an STM32WB55CG in a custom board with SWD interface. When I tried to connect the MCU using STM32CubeProgrammer, the MCU is identified in the Cube Programmer. But, when I tried to program it using the STM32cube IDE, device is not identified. Also, when I tried to erase the flash using STM32CubeProgrammer and also tried to write program through flash Programmer both does not work and shows errors. What is the problem behind it?

[Remi QUINTIN]

​What kind of error do you have with CubeProgrammer once connected and trying to program or erase the Flash memory?

What are the values of the option bytes?

[ASiva.1]

Thank you for the reply. That problem was that the voltage detection of the custom board showing 1.7 V even though the voltage that is powered the mcu was 3.3 V. That was due to physical damage to the programming cable. Now that is working.

[Remi QUINTIN]

​Good! Thanks for your feedback.