How to fit AVR128DA48 Curiosity Nano onto a Curiosity Nano Base Board?

I figured I would have a play with one of the newer AVD devices so I got myself an AVR128DA48 eval board from Microchip and a base adapter board. Now, here's the thing ...

This is the AVR128DA48 eval board:


There seems to be 2 sets of connections going on. The very edge of the board (all nice and straight) and a duplicate set of contacts slightly inset that are offset from eachother.

This is the base adapter board:


Note the 2 nice rows of female headers that the eval board mates with. The holes don't line up. Obviously the offset holes on the slightly inset pads are not going to work. But neither do the straight rows of contacts on the edge of the board.


The only way I can figure this out is if I solder the male headers to the contacts on the edge of the 128DA board and then solder in a separate single row female header on the base adapter board in the unpopulated row of contacts.

I also have 2 other eval boards that have the same pin arrangements as the 128DA board.

The female headers on the base adapter board were pre-soldered by the manufacturer.

Am I missing something obvious?

Using Pin-Headers ← staggered holes are for a solderless pin strip installation
Curiosity Nano Adapter ← see page 10 (the large holes align)

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Oh well, that'll teach me to read the manual in future! :laughing: :laughing: :laughing:

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