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SCLK Problem CC2500 w SmartRF04EB

SCLK Problem CC2500 w SmartRF04EB

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Randy Williams
Posted by
on Mar 27 2012 17:53 PM
Intellectual540 points

Hello,

I have a problem with the CC2500.  I am trying to interface the CC2500 with an external micro.  The CC2500EM is attached to a SmartRF04EB.  I have verified with a logic analyzer that the micro is putting the correct signals on the correct lines and that they are connected, as per the schematics for the SmartRF04EB, correctly to the CC2500.  I have removed all of the zero Ohm resistors and the jumpers between the header and the USB IC.  The problem I have is that when I connect the SCLK signal line  to the SmartRF04EB, the SCLK signal disappears. If I remove the CC2500EM it still disappears.  If I power down the SmartRF04EB the SCLK signal is fine and the SPI is operating correctly.  I have two complete DK-CC2500 boards both with SmartRF04EBs and CC2500EMs and they both do the same thing.

I have read all of the documentation I know of, looked through these pages etc.  I suspect that there is something further I need to disconnect but I have no idea what it is or where to find it.  Does anyone have an idea what is wrong here?

Best Regards,

Randy

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  • Randy Williams
    Posted by
    on Mar 28 2012 20:29 PM
    Verified Answer
    Verified by
    Intellectual540 points

    There does seem to be something wrong with the Smart Rf04EB.  I stuck wires into the Samtec Bd2Bd connector of the CC2500EM and everything worked fine.  Its very strange but not too surprising.  Consider this closed.

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