CC2640R2F: Schematic review

Rajneesh

Part Number: CC2640R2F

Hello Ti team

Please find attached CC2640R2 schematic file. This is my custom designed board.

I have sample board and I can download BLE example code and it's advertising correctly and Bluetooth range is ok.

My question is after downloading example code (BLEPeripheral) via IAR or CCS or flash programmer-2, board advertising correctly but can not connect to device when we tap on connect button on mobile app it get disconnect immediately. I tried multiple time and results are same.

Could anyone review the attached schematic and let me know if any thing wrong in designing.

sch_screenshot.pdf

Regards

Raj

over 7 years ago

0 RGW over 7 years ago

TI__Mastermind 34870 points

The last capacitors for the 32 kHz crystal are different compared to the standard ref design. Double check the values.

0 Rajneesh over 7 years ago in reply to RGW

Intellectual 380 points

Yes, I see. I used 15pF near to the 32 KHz. Does this cause any problem?

0 RGW over 7 years ago in reply to Rajneesh

TI__Mastermind 34870 points

Just make sure the correct load cap values are used with the crystal. Have you tried your code on a known hardware design (LaunchPad) in order to determine if the problem is software or hardware related.

//Richard

Bluetooth®︎

Bluetooth forum

CC2640R2F: Schematic review