Changing external crystal from 32Mhz to 16Mhz

Himanshu Jain

Other Parts Discussed in Thread: CC2541

Hello,

We have changed the External crystal oscillator, In reference design it is 32Mhz but we changed it to 16Mhz. In application examples we have made the following change also :-

#define EXTERNAL_CRYSTAL_OSC 16 // earlier it was 32.

Does these changes affects the functioning of system?

over 10 years ago

0 Fredrik K over 10 years ago

TI__Guru** 106705 points

Hi Himanshu,

The CC2541 will only work with a 32 MHz crystal. You cannot use 16 MHz.

Cheers,
Fredrik

0 Himanshu Jain over 10 years ago in reply to Fredrik K

Prodigy 140 points

Hi Fredrik

Thanks for your reply. I was able to program the CC2541 with the BLEperipheral program using the 16MHz crystal but the customised PCB is not transmitting any signal. I am not sure whether it is due a different crystal. Could this be a reason?

Cheers
Himanshu

0 Fredrik K over 10 years ago in reply to Himanshu Jain

TI__Guru** 106705 points

Hi Himanshu,

Yes, it is because of the crystal. The CPU will probably work (as you have seen), but not the radio.

Cheers,
Fredrik

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Changing external crystal from 32Mhz to 16Mhz