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Hi,
For the past week I have been attempting to interface an atmega328 microcontroller and the ads1299 evaluation board. Right now I have the daughter board disconnected from MM0B and have it powered by a cable connecting MM0B's power header to the one on the bottom of the daughter board.
The MOSI & SCK signals coming out from the microcontroller look fine, however as soon as i connect the board the sck signal shrinks and seems to appear on the mosi and miso line also. I have attached oscope pics.
Above the sck and mosi signals look fine. However, as soon as I connect the ADs1299 the sck line appears to be muffled.
My board is configured as such:
Any advice on board configuration, register settings, etc on how an external microcontroller and this daughter board should be connected would be greatly appreciated.
Thanks,
-Rick Housley
Hi
I've just got the ADS1299 EVK working with an external uP (so there is hope!!)
Do the signals appear in the right place on J3 of the EVK??
BL