Page 1 of 8

MMU SMT ADAPTERS - WIP

Posted: Tue Oct 23, 2018 6:13 pm
by exxos
Somewhere I mentioned about the lack of PLCC MMU & GLUE, and that I have small stock of SMT versions which I may build onto the possible future mongrel motherboard...

Meanwhile, it does look like a SMT to PLCC adapter could be possible...

MMU_RISER.jpg
MMU_RISER.jpg (73.13 KiB) Viewed 2315 times

The problem will be costs involved in getting these made, it could may well end up rather expensive compared to other chips have been, but as they're not so easy to obtain any more, then we need some sort for solution spares..

BEST has the MMU listed as $40, Which is simply ridiculous, like a lot of their prices.. But I am reasonably confident this adapter board would still be around half that price..

Re: MMU SMT ADAPTERS - WIP

Posted: Tue Oct 23, 2018 6:57 pm
by exxos
Looks like it all fits :)

Not to scale ;)

2.jpg
2.jpg (72.34 KiB) Viewed 2302 times
sch.png
sch.png (153.87 KiB) Viewed 2302 times

Re: MMU SMT ADAPTERS - WIP

Posted: Fri Oct 26, 2018 6:31 pm
by exxos
Totally forgot about this board again...

I've added it into my shopping trolley for PCBs to order :)

Still need to do the GLUE version yet...

0ca7074fa8833efabefb5d21c655291b.png
0ca7074fa8833efabefb5d21c655291b.png (95.41 KiB) Viewed 2262 times

Re: MMU SMT ADAPTERS - WIP

Posted: Fri Oct 26, 2018 7:43 pm
by exxos
Dang it...

The 80 pin pinout doesn't list the GND connections :roll:

Does anyone have a board they can check ??? I don't seem to have one :(

SMD_GLUE_TROED.PNG
SMD_GLUE_TROED.PNG (225.53 KiB) Viewed 2254 times

Re: MMU SMT ADAPTERS - WIP

Posted: Fri Oct 26, 2018 10:12 pm
by troed
exxos wrote:
Fri Oct 26, 2018 7:43 pm
Dang it...

The 80 pin pinout doesn't list the GND connections :roll:

Does anyone have a board they can check ??? I don't seem to have one :(
Sorry, just switched out my last SMT board last weekend :(

Re: MMU SMT ADAPTERS - WIP

Posted: Fri Oct 26, 2018 10:17 pm
by exxos
troed wrote:
Fri Oct 26, 2018 10:12 pm
Sorry, just switched out my last SMT board last weekend :(
dang it.. Someone must have one somewhere.... I've got some ST's at my girlfriends, will try and remember to look tomorrow...

Re: MMU SMT ADAPTERS - WIP

Posted: Fri Oct 26, 2018 10:47 pm
by sandord
exxos wrote:
Fri Oct 26, 2018 10:17 pm
dang it.. Someone must have one somewhere.... I've got some ST's at my girlfriends, will try and remember to look tomorrow...
What exactly do you need?

Re: MMU SMT ADAPTERS - WIP

Posted: Fri Oct 26, 2018 10:57 pm
by exxos
sandord wrote:
Fri Oct 26, 2018 10:47 pm
What exactly do you need?
Need to know which pins on the SMT 80 GLUE are connected to 0V...

Re: MMU SMT ADAPTERS - WIP

Posted: Fri Oct 26, 2018 11:01 pm
by sandord
exxos wrote:
Fri Oct 26, 2018 10:57 pm
Need to know which pins on the SMT 80 GLUE are connected to 0V...
Ah, mine is 68 pins. So there are ST revisions that have a 80 pins GLUE. Learning new stuff every day.

Re: MMU SMT ADAPTERS - WIP

Posted: Fri Oct 26, 2018 11:03 pm
by exxos
sandord wrote:
Fri Oct 26, 2018 11:01 pm
Ah, mine is 68 pins. So there are ST revisions that have a 80 pins GLUE. Learning new stuff every day.
yep.. look at the pinout I posted earlier..