Undocumented SB32 on latest nRF52832 DK

RE: Undocumented SB32 on latest nRF52832 DK

Marius Heil — Thu, 26 Oct 2017 12:58:22 GMT

Thanks, that was just what I was looking for. I also found out that the other debug headers on the board can be used as well. :-)

RE: Undocumented SB32 on latest nRF52832 DK

Bjørn Kvaale — Wed, 25 Oct 2017 11:55:17 GMT

This is just a guess, but the solder bridge SB47 on the nrf52840 dk is also placed right by the debug out port. In the Infocenter, it says this solder bridge is used as a: "Short to enable power supply of the external device when using the debug out connector". I have talked to an expert here at Nordic and will let you know as soon as I know more.

RE: Undocumented SB32 on latest nRF52832 DK

Marius Heil — Tue, 24 Oct 2017 12:45:15 GMT

added picture, its a new revision, documentation is old it seems

RE: Undocumented SB32 on latest nRF52832 DK

Bjørn Kvaale — Tue, 24 Oct 2017 12:29:23 GMT

But the link you just sent me was for the nrf52840 preview dev kit. I looked at the hardware drawings for the nrf52832 dk, but could not find the SB32. Could you send me a picture of your dev kit with the sb32? It seems weird that they would forget to mention the sb32 in the infocenter.

RE: Undocumented SB32 on latest nRF52832 DK

Marius Heil — Tue, 24 Oct 2017 12:19:42 GMT

Sorry, looks like I wasn't specific enough, I mean the nRF52832 DK infocenter.nordicsemi.com/index.jsp But it's not documented

RE: Undocumented SB32 on latest nRF52832 DK

Bjørn Kvaale — Tue, 24 Oct 2017 11:52:51 GMT

If SB32 is shorted, then you can supply an external board via the programming pins. Once the SB32 is shorted, it's not possible to program the onboard nrf52832 because Segger routes the SWD signals to the connector (EXT_VTG is used to decide what should get programmed)