Problems using the NRF51822-CEAA flip chip package in a custom design

RE: Problems using the NRF51822-CEAA flip chip package in a custom design

Jamie — Tue, 17 Sep 2013 17:12:23 GMT

As a follow up, the J-link PRO and the J-link both work.

Cheers, Jamie

RE: Problems using the NRF51822-CEAA flip chip package in a custom design

Jamie — Tue, 17 Sep 2013 13:26:07 GMT

Hi Ole,

You are correct, and we have overnighted the J-Link PRO for delivery today. We thought the the J-link Lite would work, because in the J-link Commander it says it needs a target voltage > 1V. In the datasheet, however, we see it is limited to 3.3V only.

Thanks again! Jamie

RE: Problems using the NRF51822-CEAA flip chip package in a custom design

Ole Morten — Tue, 17 Sep 2013 13:16:05 GMT

It sounds like this problem is due to the fact that the J-Link Lite supplied with the Development Kit only supports programming devices running at or close to 3 V. If you try to program a device running on 1.8 V, this will fail.

The easiest way to fix this is to get hold of a regular J-Link, which has level shifters built-in, but it is most likely also possible to build such shifter yourself if you want to.