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
