Does the nRF52840 support SW-DP multi-drop?

[Thomas E.]

We are starting to get ready for production and will have 24 board on each panel. It would be great to be able to "chain" 4 to 6 nRF52840's together using the multi-drop protocol for programming and initial board test.

Does the nRF52840 support ARM's SW-DP multidrop protocol options?

I can not find the previous white-paper for programming the nRF52's, is there a new one?

https://developer.arm.com/docs/ddi0480/c/debug-access-port/swj-dp/jtag-and-swd-interface

Many thanks,

thomas

[Øyvind]

Hello, 

 

I can not find the previous white-paper for programming the nRF52's, is there a new one?

 Do you mean nWP027 - nRF52832 Production Programming? This can be found under White Papers in our Infocenter

According to the nRF52840 Debug and Trace chapter:
The debug access port (DAP) implements a standard ARM CoreSight serial wire debug port (SW-DP), which implements the serial wire debug protocol (SWD).

It does not support multidrop from what I can see.

Kind regards,
Øyvind

[Thomas E.]

Thank you. After Nordic's web site refresh a few months ago many external links in the search engines are now broken. I did not search for nRF52832, only nRF52840.

[Øyvind]

You are welcome. Let me know if you have any further questions. 

Kind regards,
Øyvind