Teensy 3.2 : How to connect an external clock

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papatoux

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Hello,
I am using a Teensy 3.2 as 16 bitd digitizer into a Pulsar receiver for my radioastronomy hobby http://f1ehn.pagesperso-orange.fr/pages_radioastro/Images_Docs/PSR_Mes_2016_revA2_Eng.pdf .


I need to improve the clock stability to be better than 0.5 ppm.
I plan to remove the Teensy 16 MHz crystal and enter an external clock to the EXTAL input.
I have read the Chapter 25 OScillator on the " K20 Sub-Family Reference Manual".
Hardware seems clear for me but I am not clear with the Software update.

My SW is based on the OScilloscope application http://people.cas.sc.edu/rorden/SW/oscilloscope/oscilloscope.zip
and the stinsyncArd.ino firmware.
Sorry, I am an RF man and not a programmer ;-)

Anybody could help me on the SW modification (If needed) to put the Teensy 3.2 with an external 16 MHZ clock ?

Thank you and best regards.
 
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