STLINK-V3MODS for custom PCB

[bramble]

Hi Community,

I'm designing a custom H755 board and had intended to implement my own USB-C with debug/programming interface using an external STLINK module. 

STLINK-V3MODS is a nice alternative way forward but I note from the user manual (UM2502) that it can only deliver up to 200 mA at 5V, whereas I need around 500 mA.

Is there an alternative debugger-progammer module that I can use, whilst also using this to deliver 5V with enough power to supply my board (power taken from USB obviously)?

I want the option to use a power-bank battery pack to power my circuit in normal operation, but the ability to program and debug via USB.

Thanks

[Andrew Neil]

It is unusual to put a debugger on a custom board.

Normally, one would just provide a debug connection.

What's the use case for putting the debugger on the board?

[bramble]

Hi @Andrew Neil , thanks for your reply - you raise a good question. Well, it's true that all I really need is the ability to flash-download and debug my board, and that was my original intention. Then I had the thought that the cost of putting an STLINK-V3MODS on the board was so low that this could be a convenient way to achieve the same, whilst saving me a USB connector and the signal conditioning needed to obtain a 5V supply from USB's VBUS.

Also to mention, my board, although being designed for a fairly specific application, is sufficiently general that I can hopefully use it as a general development board.

Thanks