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Discussion Groups | TMS320C28x | Crystal oscillator for F2812 board
Technical discussions about the TI C28x DSPs (including the C2810, C2811, C2812, F2801, F2806, F2808, F2810,, F2811, F2812, R2811 and R2812).
Crystal oscillator for F2812 board - narc...@gmail.com - Apr 5 7:09:24 2008
i am using a crystal of 30MHz. but i dont know the crystal specification. i have used 22 pf load capacitors, but the frequency generated is 10 MHz. (i suppose there could be some impedance mismatch) so if someone could suggest the vendor for crystal oscillators or other solution. ------------------------------------ Check Out Industry's First Single-Chip, Multi-Format, Real-Time HD Video Transcoding Solution for Commercial & Consumer End Equipment: www.ti.com/dm6467 You can post a message or access and search the archives of this group on DSPRelated.com: http://www.dsprelated.com/groups/c28x/1.php _____________________________________
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Re: Crystal oscillator for F2812 board - AminRezaie - Apr 7 10:27:36 2008
Hi
It's better use bigger Cap. like 33pF capacitor.
It's my experience.
for more information see (sprs174O-section 3-10)
Amin
n...@gmail.com wrote:
i am using a crystal of 30MHz. but i dont know the crystal specification. i have used
22 pf load capacitors, but the frequency generated is 10 MHz. (i suppose there could be some
impedance mismatch)
so if someone could suggest the vendor for crystal oscillators or other solution.
------------------------------------
Check Out Industry's First Single-Chip, Multi-Format, Real-Time HD Video Transcoding Solution
for Commercial & Consumer End Equipment: www.ti.com/dm6467
You can post a message or access and search the archives of this group on DSPRelated.com:
http://www.dsprelated.com/groups/c28x/1.php
_____________________________________
(You need to be a member of c28x -- send a blank email to c28x-subscribe@yahoogroups.com )
Re: Crystal oscillator for F2812 board - Xiang Chao - Apr 7 10:28:17 2008
That is a crystal with fundamental frequency of 10MHz. With proper configuration, it can work at 3rd harmonic. If you don't know the exact parameters, change a crystal with fundamental frequency of 30MHz. I ran into the same problem once. Chao --- n...@gmail.comдµÀ: > i am using a crystal of 30MHz. but i dont know the > crystal specification. i have used 22 pf load > capacitors, but the frequency generated is 10 MHz. > (i suppose there could be some impedance mismatch) > so if someone could suggest the vendor for crystal > oscillators or other solution. > ------------------------------------ Check Out Industry's First Single-Chip, Multi-Format, Real-Time HD Video Transcoding Solution for Commercial & Consumer End Equipment: www.ti.com/dm6467 You can post a message or access and search the archives of this group on DSPRelated.com: http://www.dsprelated.com/groups/c28x/1.php _____________________________________
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