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Re: NEW BOM
Posted: 05 Oct 2020 13:21
by PaulJ_2.0
Hanzu wrote: 05 Oct 2020 12:43
Hi
I thought buffered IDE is always better than unbuffered, so why so many wants unbuffered?
Adding some 74VHC245PW to IC4, IC5 and IC6 and removing some SMD resistor networks is no problem, but it would be nice to know the benefits of each option (Buffered and Ubuffered) before ordering other parts. Almost all pictures of Googled TF536 are are Unbuffered (no IC4, IC5 and IC6). Only one found as buffered.
Also half of the Googled TF536 pictures are without JTAG1 connector and that makes me wonder how do those people program Xilinx?
Buffered IDE is mostly a niche thing. It is for long IDE cables, most people use short CF adapters, so there is no real need for the extra expense and time to install the chips.
You can program the board using pins inserted into the JTAG holes on the board, again, no real need to add something that isn't used.
Re: NEW BOM
Posted: 05 Oct 2020 16:03
by GadgetUK164
The other nice thing with buffered IDE (and primary reason I added it) - it isolates lots of connections from the Xilinx chips.
I killed one of the CPLD's on my TF534 by accidentally connecting an SD to IDE the wrong way around on the IDE connector. That wouldn't happen on the 536 I think. Worst case, buffer chip dies.
Re: NEW BOM
Posted: 05 Oct 2020 17:14
by LADmachining
Hanzu wrote: 05 Oct 2020 12:52
@exxos Yes I can. External sites edited away.
There is an error on TerribleFire TF53x Accelerator Cards - BoM Spreadsheet row 10 column 8 says "IC CPLD 72MC 10NS 64VQFP" and if you go to Digikey link for example you notice it is "IC CPLD 288MC 10NS 144TQFP"
64 pins compared to 144 pins.
Updated the BoM - description corrected.
Thanks!
Re: NEW BOM
Posted: 26 Oct 2020 13:12
by Hanzu
LADmachining wrote: 05 Oct 2020 17:14
Hanzu wrote: 05 Oct 2020 12:52
@exxos Yes I can. External sites edited away.
There is an error on TerribleFire TF53x Accelerator Cards - BoM Spreadsheet row 10 column 8 says "IC CPLD 72MC 10NS 64VQFP" and if you go to Digikey link for example you notice it is "IC CPLD 288MC 10NS 144TQFP"
64 pins compared to 144 pins.
Updated the BoM - description corrected.
Thanks!
Thanks, but the BOM table still has a lot of errors in column G (Board ID):
Row 10 is IC3, so row 7 is something else than IC3, I think it is IC2 (silkscreen paiting is tiny and hard to read).
Row 5 is C1 & C2, not C1-C15.
Row 12 is OSC2 not OSC1.
Row 2 quantity is not 2. It is 8 since there are 1206 size capacitors. Not sure if they are all the same type, but they are C3, C6, C8, C9, C16, C17, C18, C24.
Row 30 quantity: I can verify it is 31 and they are all 0603 size. Too tiny to read Board IDs.
Re: NEW BOM
Posted: 29 Oct 2020 16:58
by LADmachining
OK, have been through the BoM and updated it according to the latest CSV versions of the parts lists.
Not sure what happened, it should now be right (I hope).
Re: NEW BOM
Posted: 21 Nov 2020 16:36
by Lynxman
It woud be nice to be able to order TF536 boards from the shared project part of PCBWay. I worry about making a mistake in the settings if I make the order myself.:
https://www.pcbway.com/project/shareproject/
Never mind. It's not open source. I was unaware of the theft that had been going on.
Re: NEW BOM
Posted: 21 Nov 2020 19:16
by terriblefire
Lynxman wrote: 21 Nov 2020 16:36
Never mind. It's not open source. I was unaware of the theft that had been going on.
It never will be open source now. Plus PCBWay make crap boards. full of issues
Re: NEW BOM
Posted: 21 Nov 2020 19:22
by stephen_usher
terriblefire wrote: 21 Nov 2020 19:16
Lynxman wrote: 21 Nov 2020 16:36
Never mind. It's not open source. I was unaware of the theft that had been going on.
It never will be open source now. Plus PCBWay make crap boards. full of issues
Never had a problem with them myself. Every board I've ordered has been completely to specification with the only issues being my own design faults.
Re: NEW BOM
Posted: 21 Nov 2020 19:51
by terriblefire
stephen_usher wrote: 21 Nov 2020 19:22
Never had a problem with them myself. Every board I've ordered has been completely to specification with the only issues being my own design faults.
About 10% of the TF328s i ordered from them had power shorted to ground. No thanks.
Re: NEW BOM
Posted: 03 Feb 2021 04:31
by DominoTree
Quick question - I've knocked one of the caps (C16) off of the bottom of my TF536 and I checked the BOM at
On line 32 it says this is a 22uF part, but both the Mouser and Digi-Key part numbers lead to 0.22uF parts, whereas the RS part number leads to a 22uF part. Am I correct in assuming that 22uF is indeed the correct value?
Thanks!