unbrick switch on custom add-on board
-
Hi,
We made our own add-on board for Voxl2. Now we want to add a switch, similar to SW2 on the Voxl2, to unbrick the board if needed.
I have seen that we can do it through pin 56 of connector J3. My questions:-
list itemis this pin high active or low active?
-
list itemAre there resistors needed (like pull-up, pull-down, or in serie)?
-
list itemIf it is high-active, should I use pin 47 of J3?
Thanks
-
-
Hi @gerhold-ten-voorde
Yes, you are correct. Pin 56 is the signal "FORCE_USB_BOOT". It is default weakly pulled down by the SoC.
To enter eDL/QDL mode, this switch connects a 2-2.2K pullup to VREG_S4A_1P8 (J3 pin 47).
So, on M0154, the default OPEN/OFF position does noting, when ON it enables the pullup.
Hope that helps.
Thanks!
Vinny
Hello! It looks like you're interested in this conversation, but you don't have an account yet.
Getting fed up of having to scroll through the same posts each visit? When you register for an account, you'll always come back to exactly where you were before, and choose to be notified of new replies (either via email, or push notification). You'll also be able to save bookmarks and upvote posts to show your appreciation to other community members.
With your input, this post could be even better 💗
Register Login