CC2640R2F: Problem with custom board

Jorge Luis Bianchetti Junior

Part Number: CC2640R2F
Other Parts Discussed in Thread: LAUNCHXL-CC2640R2

Hi. I made a custom board using the CC2640R2F 7x7 package and when I try to flash any example to it, such as Project_Zero or Simple_Peripheral, it appears for 1 second on BLE Scanner and disappears. But, when I enter into debug mode and press "resume", it works fine and I can connect to the device with no problem. If I exit debug mode, it again appears for 1 second and disappears.

I am using the CCS v8.3 and LAUNCHXL-CC2640R2 to program the custom board.

over 7 years ago

0 YiKai Chen over 7 years ago

Guru 735695 points

Try to check accuracy of your 32K crystal.

0 TER over 7 years ago in reply to YiKai Chen

TI__Guru**** 317180 points

For custom hardware you should run basic RF tests before uploading BLE software.

You should first run as many of the tests suggested in www.ti.com/.../swra603.pdf as possible first and then try to run rfPacketTx/ rfPacketRx to see if you get a link. If that works, check if the 24 MHz and 32 kHz clocks gives the expected accuracy.

0 Jorge Luis Bianchetti Junior over 7 years ago in reply to TER

Prodigy 60 points

The problem was that I am using the internal LDO configuration in my board, but the examples provided are for internal DC-DC. I made the changes suggested in e2e.ti.com/.../2418073 and now everything is working fine. Thanks!

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CC2640R2F: Problem with custom board