DIP Adaptor with >4k RAM

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#1
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I've a unit out in the field which the customer has asked me to add some features to. It currently runs using a DIP mega644P. The changes are easy except that I will need more than 4k RAM, probably nearer 6k, it currently uses just over 1k. In the absence of the mega1284P does anyone know of a DIP adaptor/'stamp' style board with a mega1280/1281/2560/2561 mounted on it BUT with a pin-out to match the 644P? Or a mega128 and XRAM?

Thanks.

#1 Hardware Problem? https://www.avrfreaks.net/forum/...

#2 Hardware Problem? Read AVR042.

#3 All grounds are not created equal

#4 Have you proved your chip is running at xxMHz?

#5 "If you think you need floating point to solve the problem then you don't understand the problem. If you really do need floating point then you have a problem you do not understand."

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I'm fairly sure you are on your own here and that you have to design your own adapter.

I think most people will find a 64 pin AVR module with only 40 pins actually available quite useless and as such nobody makes such module.

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The neatest solution would be a QFN 1281, as it's only 9 mm square, and would fit nicely on a DIL40 PCB. The PCB design should be quite straightforward.

Leon Heller G1HSM

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@jayjay
I take your point although I'm sure many people would be interested in a DIP40 processor with lots of RAM and peripherals.

@Leon
Thanks, hadn't thought of a QFN packaged device.

#1 Hardware Problem? https://www.avrfreaks.net/forum/...

#2 Hardware Problem? Read AVR042.

#3 All grounds are not created equal

#4 Have you proved your chip is running at xxMHz?

#5 "If you think you need floating point to solve the problem then you don't understand the problem. If you really do need floating point then you have a problem you do not understand."