Sale or giveaway of slightly defect LPC1769 (No network)

[audiomobster]

Interesting for people with smd skills.

Latest MIOS Bootloader at time of writing installed.

Screwed when removing a drop of tin solder with a soldering pump. Then I lost the SMD parts.  :mad:

[Imp]

Maybe this helps to get it fixed:

I just measured the resistance of your missing part (the one with the outline): it is 6,6K ohm while installed. If you measure  between the pads, we could derive the proper value. I guess it's 10k.

i couldn't get a proper value for the other part. I tried capacity and resistance.

 

Does it work without these?

[ilmenator]

Isn't there documentation available that tells you what value C63 has? Then order the part at Reichelt, this is not a super miniature part, it is an easy fix!

[TK.]

Link to the schematic: http://www.embeddedartists.com/sites/default/files/docs/schematics/LPCXpressoLPC1769revB.pdf

C63 is a 18pF cap

 

Best Regards, Thorsten.

[audiomobster]

Thanks guys, I'll see if I get it repaired. And yes it seems to work except that I get CRC errors on the network port.

[TK.]

C63 is part of the oscillator circuit of the Ethernet PHY - this explains why there are CRC errors (the PHY isn't clocked)

 

Best Regards, Thorsten.