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Author Topic: External Clock  (Read 699 times)

Lee Noack

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External Clock
« on: October 03, 2017, 08:51:24 AM »
Hi,

Does the ext clk refer to an external clock in or the clock out of the crystal. I wish to feed an external clock in to the board.

LubOlimex

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Re: External Clock
« Reply #1 on: October 03, 2017, 01:26:14 PM »
Usually, yes, it is meant for external clock source. It is a good idea to mention which board exactly you have in mind, though.
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Lee Noack

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Re: External Clock
« Reply #2 on: October 04, 2017, 02:16:32 AM »
Ah yes. It is the ice40HX1K-EVB however the other boards have the same or similar clock cct.

Can't insert/attach cct, sorry.



« Last Edit: October 04, 2017, 02:22:38 AM by Lee Noack »

LubOlimex

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Re: External Clock
« Reply #3 on: October 04, 2017, 02:53:32 PM »
In iCE40HX1K-EVB we have already provided external clock. EXTCLK is generated by the 100Mhz oscillator CR1. Refer to this excerpt of the schematic: https://i.imgur.com/XKJaFmO.jpg
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