STLINK-V3MODS unpowered

[leddel32]

Hi,

 

We are thinking of integrating the STLINK-V3MODS onto a bigger board. With ST-linkV2 we have the problem that when the V2 is not powered by USB, but is connected to the target MCU, it will pull the NRST pin to GND, causing the target MCU to not boot up.

When we integrate the STLINK-V3MODS onto the PCB. Should we make sure this STLINK-V3MODS is always powered through the 5V line to make sure it will not pull down our reset line of the target MCU?

 

Best regards,

[Mike_ST]

Hello,

>> Should we make sure this STLINK-V3MODS is always powered through the 5V line to make sure it will not pull down our reset line of the target MCU?

yes,

or

the recommendation is to add a solder bridge or a jumper to allow disconnecting the reset line between the ST-Link and the target MCU.