CC2640R2F: How to support external digital 24MHz clock input

Albin Zhang

Expert 6250 points

Part Number: CC2640R2F
Other Parts Discussed in Thread: CC2640, CC1310,

Hi,

does CC2640 support external digital 24MHz clock input?

means, none-xtal.

BR. Albin

over 9 years ago

0 Fredrik K over 9 years ago

TI__Guru** 106705 points

Hi Albin,

The CC2640 does not support external 24 MHz clock.

BR,
Fredrik

0 Albin Zhang over 9 years ago in reply to Fredrik K

TI__Expert 6250 points

CC1310 should be the same, shouldn't it?
BR. Albin

0 Alejandro Miranda over 9 years ago in reply to Fredrik K

Prodigy 20 points

Hi Fredrik,

So from your comment is it safe to assume that we can not use an external digital 24Mhz clock source for the CC2640r2f?

Or can the CC2640r2f output a clock on any of its I/Os ? If so, what pins would we use on the YFV package ?

Thanks dude.

:) Alejandro Miranda

0 Fredrik K over 9 years ago in reply to Alejandro Miranda

TI__Guru** 106705 points

Hi Alejandro,

Yes.

You can use the timer module to output square waves (clock), but the IOs do not support high frequencies. As the frequency increases the edges will be more and more rounded off.

Cheers,
Fredrik

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CC2640R2F: How to support external digital 24MHz clock input