Stockly.com Forums  

Go Back   Stockly.com Forums > Search Forums

Notices

Showing results 1 to 25 of 44
Search took 0.00 seconds.
Search: Posts Made By: rgjones
Forum: PSRAM Area! 05-10-2008, 07:51 PM
Replies: 66
Views: 90,541
Posted By rgjones
No.... After i mounted the SDRAM chip ... I...

No.... After i mounted the SDRAM chip ... I decided to go back and finish off the SRAM interface for the IIcmxp as I left it 80% wired up before I got derailed with pumping out uthernets and our...
Forum: PSRAM Area! 05-04-2008, 11:24 PM
Replies: 23
Views: 26,888
Posted By rgjones
Thats what I am the most famiiliar with. ...

Thats what I am the most famiiliar with.



yeah I think we have different ideas on where to plug in the logic (at least at first) - you want SDRAM to look/act/smell like old dram ... you have to...
Forum: PSRAM Area! 05-04-2008, 03:41 AM
Replies: 23
Views: 26,888
Posted By rgjones
http://www.a2retrosystems.com/images/memory%20proj...

http://www.a2retrosystems.com/images/memory%20project/DSC07483.JPG
Forum: PSRAM Area! 05-03-2008, 06:57 PM
Replies: 66
Views: 90,541
Posted By rgjones
Did a little more research and there is a reason...

Did a little more research and there is a reason it's called CellularRam ...the real market for this stuff is Cell phones and not much else.



My understanding with both the slinky and the RWIII...
Forum: PSRAM Area! 05-02-2008, 04:09 AM
Replies: 66
Views: 90,541
Posted By rgjones
They are 201's - itsy bitsy tiny weeny ...

They are 201's - itsy bitsy tiny weeny

remember it's only 1.5" x 1.5" in total size

:D
Forum: PSRAM Area! 05-02-2008, 04:06 AM
Replies: 66
Views: 90,541
Posted By rgjones
True BGA anything in small qty - very $$$ - only ...

True BGA anything in small qty - very $$$ - only starts to get reasonable @ 100+



From what I understand PSRAM is essentialy some logic fronting SDRAM in a super small package. ...
Forum: PSRAM Area! 05-02-2008, 03:25 AM
Replies: 66
Views: 90,541
Posted By rgjones
Sure you win the mini novella award ;-)

Sure you win the mini novella award ;-)
Forum: PSRAM Area! 05-02-2008, 03:23 AM
Replies: 66
Views: 90,541
Posted By rgjones
Still messing around with Eagle ... my latest...

Still messing around with Eagle ... my latest attempt with labels, resistors and caps

http://www.a2retrosystems.com/images/memory%20project/breakout_5mil_trace_8mill_drill_cap_res.png

Big Size...
Forum: PSRAM Area! 04-30-2008, 02:48 PM
Replies: 66
Views: 90,541
Posted By rgjones
Lower rez ...

Lower rez

http://www.a2retrosystems.com/images/memory%20project/breakout_5mil_trace_8mill_drill.png


Slightly better looking but larger file size
...
Forum: PSRAM Area! 04-29-2008, 09:39 PM
Replies: 66
Views: 90,541
Posted By rgjones
No that was just a quick test ... it has a few...

No that was just a quick test ... it has a few issues

1) pad size is 36mil - needs to be 30mil
2) both vcc and gnd traces would not route for some reason so I have to do that manual
3) some of...
Forum: PSRAM Area! 04-24-2008, 04:46 PM
Replies: 2
Views: 4,926
Posted By rgjones
Well i am guessing FDC stands for Floppy Disk...

Well i am guessing FDC stands for Floppy Disk Controller?

34 pin IDC
Forum: PSRAM Area! 04-23-2008, 11:55 PM
Replies: 23
Views: 26,888
Posted By rgjones
Circuit Cellar?

Any one have back issues of Circuit Cellar

ISSUE 125 - December 2000

Theme: EMBEDDED DEVELOPMENT

SDRAM: The New Embedded Solution—by Mark Balch, 12.
Forum: PSRAM Area! 04-23-2008, 09:37 PM
Replies: 66
Views: 90,541
Posted By rgjones
Henry, I need something like a ribbon cable that...

Henry, I need something like a ribbon cable that has 1.27mm x 1.27mm header on one end that goes to a 2.54mm x 2.54mm header on the other end. Not sure if there is such a thing.

I may have to take...
Forum: PSRAM Area! 04-23-2008, 02:17 PM
Replies: 66
Views: 90,541
Posted By rgjones
Grant any suggestions on patching the 1.27mm x...

Grant any suggestions on patching the 1.27mm x 1.27mm header to something double the size? 2.54 x 2.54?
Forum: PSRAM Area! 04-23-2008, 02:16 PM
Replies: 66
Views: 90,541
Posted By rgjones
He is one of them although it's only been a week...

He is one of them although it's only been a week maybe but this other guy in Canada .... seems like he is just turning it around and getting quotes from other people ... I thought from his web site...
Forum: PSRAM Area! 04-23-2008, 12:53 PM
Replies: 66
Views: 90,541
Posted By rgjones
I am not sure if this is the norm in the...

I am not sure if this is the norm in the electronics business but I have been waiting for quotes on a few things now and while it is small volume it really can't be that diffiicult if your setup for...
Forum: PSRAM Area! 04-23-2008, 12:37 PM
Replies: 4
Views: 7,278
Posted By rgjones
Thanks for these links ... I didn't know about...

Thanks for these links ... I didn't know about SN74LVCC4245A - will come in handy - I will have to get some .....
Forum: PSRAM Area! 04-23-2008, 12:26 PM
Replies: 23
Views: 26,888
Posted By rgjones
No I didn't thanks for the link ...

No I didn't thanks for the link ...
Forum: PSRAM Area! 04-23-2008, 03:28 AM
Replies: 66
Views: 90,541
Posted By rgjones
Just looking at this AVR32 board now and while...

Just looking at this AVR32 board now and while it's wonderfull they brought out all the i/o onto two rows down the side of the PCB but did they have to make the spacing so frickin small? for want of...
Forum: PSRAM Area! 04-23-2008, 12:46 AM
Replies: 23
Views: 26,888
Posted By rgjones
Two clocks - one for the RAM and one for the host

Two clocks - one for the RAM and one for the host
Forum: PSRAM Area! 04-22-2008, 12:10 AM
Replies: 66
Views: 90,541
Posted By rgjones
I bought the 34 CHANNEL LA1034 LOGICPORT LOGIC...

I bought the 34 CHANNEL LA1034 LOGICPORT LOGIC ANALYZER

http://www.pctestinstruments.com/
Forum: PSRAM Area! 04-21-2008, 11:39 PM
Replies: 66
Views: 90,541
Posted By rgjones
Thats the conclusion Alex Freed came to when he...

Thats the conclusion Alex Freed came to when he used a 20MHz avr for his Psuedo disk project although I thought that at 60Mhz it might just be fast enough ....

I think I am going to hook my test...
Forum: PSRAM Area! 04-21-2008, 11:25 PM
Replies: 23
Views: 26,888
Posted By rgjones
What size were the PCB's?

What size were the PCB's?
Forum: PSRAM Area! 04-21-2008, 11:24 PM
Replies: 23
Views: 26,888
Posted By rgjones
So it might be worth it to use GP for prototypes...

So it might be worth it to use GP for prototypes and QP for production runs. I have been meaning to learn how to panelize my own jobs so I can get different PCB's out of every run rather then just...
Forum: PSRAM Area! 04-21-2008, 11:15 PM
Replies: 66
Views: 90,541
Posted By rgjones
btw ... I was was pretty surprised when I looked...

btw ... I was was pretty surprised when I looked around a few months ago and didn't find anyone offering a board like we are proposing - I found one link on the Sparkfun forums where one of their...
Showing results 1 to 25 of 44

 
Forum Jump

All times are GMT. The time now is 08:39 PM.


Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2022, vBulletin Solutions, Inc.