PROC module keeps dropping connection

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Anonymous
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Hi,

   

I'm having trouble maintaining a connection with the PROC module (CYBLE-022001) mounted on the board I'm bringing up.  I'm running BLE UART example code (Server code on the PROC and Client on a CY-SMART board).

   

The two devices continuously connect then disconnect - typically after just a few seconds. 

   

The same code (slightly different target) runs just fine on the cypress pioneer kit.

   

I checked power-supply noise on the 3.3V rail (it's less than 40mV pk-pk). I'm using standard BLM21P331 ferrites. XRES is noise-free and high. I don't see any requirement to pull-up or pull-down other signals.

   

Any suggestions?

   

-- Jon

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Anonymous
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For some unknown reason it just started working. Maintained connection for full 12 hours until power-down. I have no clue what changed. There have been no software or hardware changes. I'll update this thread if there are any further developments.

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