Oh I see <@U016HU5HK8V> so that's why <@U016EM8L91...
# shuttleh
Hadir Khan
11/30/2020, 11:03 AMOh I see @User so that's why @User is saying to configure it with 10 MHz to be on a safe side if they cannot provide higher frequencies such as 50 MHz. Right?
m
Matt Venn
11/30/2020, 11:11 AMI think the reason is that Tim isn't confident that the gpio pads will handle > 10mhz
Matt Venn
11/30/2020, 11:11 AMso use lower external clock and then use the internal (not) pll to get higher internal frequencies
Matt Venn
11/30/2020, 11:11 AMbut I do'nt know what this means for outgoing signals that need to be > 10mhz
Matt Venn
11/30/2020, 11:11 AMmaybe they will be degraded in some way
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drr
11/30/2020, 11:27 AMI saw 33mhz output on the skywriter GPIO docs so I hope it's close to that for outputs, it'd be enough for video projects
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Matt Venn
11/30/2020, 11:27 AMyeah me too.
t
tnt
11/30/2020, 11:27 AMErr yeah, I have a 48 MHz video clock ...
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Hadir Khan
11/30/2020, 11:45 AMSorry I am a newbie in terms of hardware, would my design work with 10 MHz? We can configure the clock to slow down if it's running at high frequencies ?
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Matt Venn
11/30/2020, 12:30 PMthe tools include a check for the design. So in the config.tcl you have a clock_period setting (in ns). The default is 10 (100mhz). If that passes then you should be able to run your design up to 100mhz
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Hadir Khan
11/30/2020, 12:33 PMYes I am able to run at 80ns