Wrong elf file download.

[giwonKIM]

Hello, I use cube programmer.

The chip I use is STM32H743ZGT6, but I accidentally downloaded the elf file of STM32H735VGT6.

So I tried to download it again, but the st-link itself won't connect. How can I fix this?

[Tesla DeLorean]

Strap BOOT0 HIGH, cycle power twice, attempt connect, and mass erase part

[giwonKIM]

Can I use stlink when entering boot mode or should I use uart?

[Tesla DeLorean]

The SWD/JTAG will work as normal, but MCU just not running your broken code, as thus likely allowing for connectivity or side stepping LDO vs SMPS settings

[giwonKIM]

This is my error : 

Error: Cannot connect to access port 0! If you are trying to connect to a device with TrustZone enabled please try to connect with HotPlug mode. If you are trying to connect to H5 device and your target is already locked with password or certificate, please open your device using Debug Authentication.

What kind of situation is it?

[Pavel A.]

>What kind of situation is it?

Failure to follow instructions. Strap BOOT0 HIGH, cycle power. Ignore messages about trustzone etc. STM32H743 does not have it.