Starting with ATMEL CPLDs: ATF1504AS

[BigDumbDinosaur]

cbscpe wrote:

Surprisingly these are quite powerfull and a full decoder with memory mapping and ROM overlay logic can be easily put into one single ATF1504AS.

One of my design iterations for POC V2 has the 1504AS, but in a PLCC44 package. As you note, you can cram quite a bit of logic into one.

[BigEd]

So, this is an entirely general-purpose TQFP44 to DIP48 adapter? Sounds handy!
[Edit: had PLC44 previously... have I got it right this time?]

[Aslak3]

It looks like this one:

http://www.ebay.co.uk/itm/310725315598

I have adapters for these parts, but nothing that would plug into breadboard. Very nice.

[cbscpe]

Hi Aslak,

yes thats those, I got mine from the dipmicro shop in ebay.de but those you linked are the same prototype boards. To make them real DIP-48 compatible and pluggable I used these

http://www.aliexpress.com/item/AE-50pcs ... 88854.html

you can get them from the bay as well e.g. here

http://www.ebay.de/itm/50Pcs-Gold-Plate ... 4adfe37f2c

They have a fine and a coarse side. The fine side fits neatly into breadboards and DIP Adapters and you just solder the coarse side to your prototype boards. I have also PLCC44 to DIP adapters but they use much more real estate on a breadboard as they are much broader, see also the link in the first post of this thread of futurlec.

cheers

Peter

[TomC]

This place in Canada has some nice-looking adapters, including vertical PLCC-DIP adapters that could save a lot of room on a breadboard:

http://www.technologicalarts.ca/shop/st ... pters.html

[BigDumbDinosaur]

TomC wrote:

This place in Canada has some nice-looking adapters, including vertical PLCC-DIP adapters that could save a lot of room on a breadboard:

http://www.technologicalarts.ca/shop/st ... pters.html

Are you referring to this specific item? It looks like a pretty handy gadget for prototyping PLCC designs, especially if wire-wrapping the unit.

[cbscpe]

Hi TomC,

thanks for the link to the site, they really have some very fancy adapters, especially this http://www.technologicalarts.ca/shop/st ... 0-pin.html one I was looking for since a very long time. And of course the PLCC adapters are really handy. Can't wait until they arrive.

Cheers

Peter

[scotws]

Peter, thanks for all this info, I'll be surely using it in the months to come for my own project.

[banedon]

cbscpe wrote:

Hi,

to save real-estate on my breadboards and to have my favorite IC form factor (DIP) I have create a few of these for my projects that use a ATF1504AS CPLD.

IMG_0216.png

after various tests and small projects (some sort of "Hallo World" and "Blinkenligths" for CPLDs) I will now start with a new SBC using one of the DIP-48 format CPLDs. Surprisingly these are quite powerfull and a full decoder with memory mapping and ROM overlay logic can be easily put into one single ATF1504AS.

cheers

Peter

Now that is quite tempting . I've used an adapter for the first time going from SOJ32 to DIP for my 10ns memory and that's worked well. Given that, I might consider this as I hate to pay so much for WW sockets as those PLCC ones.

[cbscpe]

Talking about your SOJ32 to DIP conversion, you are aware that there are various 128kbyte Cache SRAMs still available in DIP, e.g. the DIP version of your AS7C1024 exists as AS7C1024-20TPC (thin plastic case a 300mil 32-DIP) or as AS7C1024-15PC (plastic case a 400mil 32-DIP) and there is also the IS61C1024-15N (300mil 32-DIP).

[GARTHWILSON]

Here's a source of WW PLCC sockets that Ed pointed out a couple of years ago:
http://uk.rs-online.com/web/c/connector ... LCC+socket

[Dr Jefyll]

Two alternative ways to wire-wrap PLCCs are described here. The option using plain pins (lower photo) is remarkably inexpensive.

[banedon]

cbscpe wrote:

Talking about your SOJ32 to DIP conversion, you are aware that there are various 128kbyte Cache SRAMs still available in DIP, e.g. the DIP version of your AS7C1024 exists as AS7C1024-20TPC (thin plastic case a 300mil 32-DIP) or as AS7C1024-15PC (plastic case a 400mil 32-DIP) and there is also the IS61C1024-15N (300mil 32-DIP).

I'd never used an adapter before so used it as an excuse to buy the parts and solder them together. The RAM socket on my board can take both the standard DIP width RAM and the wider adapter that I've created:

Also, the AS7C1024B-12TJIN seemed the best of the bunch available at Farnell (I tacked it on to a larger order).

[banedon]

Which software and do you normally use with ATF1504AS?
I've never used JTAG apart form to rescue an AVR using my AVR Dragon.
Looking at this link, it seems that yoiu have to purchase an ISP JTAG USB cable and use WinCUPL?
I don't think my AVR Dragon will work with JTAG with this chip as the Dragon is almost certainly for AVRs only (unless someone has tried this already and found it works?).

[BigDumbDinosaur]

banedon wrote:

Which software and do you normally use with ATF1504AS?
I've never used JTAG apart form to rescue an AVR using my AVR Dragon.
Looking at this link, it seems that yoiu have to purchase an ISP JTAG USB cable and use WinCUPL?
I don't think my AVR Dragon will work with JTAG with this chip as the Dragon is almost certainly for AVRs only (unless someone has tried this already and found it works?).

Atmel has a stand-alone program called AtmelISP, which I obtained from their website (ZIP file attached). My connection is through a Centronics port, using the adapter assembly that they sell as part of their ATF15xx-DK3 kit. I'm going to take a shot at reverse-engineering the adapter and will post any results.