BOM

TF520 - 68020 Board

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GadgetUK164
Posts: 372
Joined: Fri Jan 04, 2019 2:26 pm

BOM

Post by GadgetUK164 » Mon Jul 12, 2021 1:06 pm

Does anyone have a BOM for the TF520? Caps I am not so worried about, its the resistors I need to know the resistance of.

EDIT: Worst case, I will just work out where they are an go with similar to TF530. I suspect they are just going to be pull ups etc.
My YouTube Channel - www.youtube.com/GadgetUK164

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GadgetUK164
Posts: 372
Joined: Fri Jan 04, 2019 2:26 pm

Re: BOM

Post by GadgetUK164 » Mon Jul 12, 2021 1:37 pm

Ah, it's OK - I see them on the schematics!

4K7 it looks like (for all)

All assembled and working OK =D Struggling to get any fast RAM working with it, but I am using a 25Mhz XTAL atm. Will drop to 20Mhz and see how I get on. The main thing is it works =D

If anyone else decides to build one of these, it uses the same schmitt trigger as the TF530. Caps - all SMD ones I went with 100nF. The two electrolytics - I just went with a 1uF and a 10uF (1uF nearest the CPU) - probably better having them the other way around. XTAL 7mm x 5mm 3.3v 20Mhz, and the usual 2.54 pin header and turn pin header etc. Nice simple board - doesn't take long to assemble!

Not very useful compared with at TF536 etc, but fun to build!
My YouTube Channel - www.youtube.com/GadgetUK164

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