I'm using the nRF52 DK (with an updated firmware) to program an external target (using the "Debug out" connector). It looks like the programming speed is limited to 1MHz:
In the Segger Control Panel, when I choose a speed under 1MHz, the "actual" speed follows accordingly (confirmed by what I see on my oscilloscope). However, when I select a speed over 1MHz, the "actual" speed doesn't go higher than 1MHz and I can see it with my oscilloscope.
At first I thought this was because of a license limitation, but I spoke with Segger and they told me that I should be able to program at speeds greater than 1MHz, there is no additional license needed for full functionality of the J-Link OB. The maximum speed should be 3.2MHz according to them.
https://www.segger.com/products/debug-probes/j-link/models/j-link-ob/
Any idea to explain the 1MHz limit?
