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Topic: Missing RAM Pins (Read 4 times) previous topic - next topic

Graynomad

I think you'll be right there, the SMC has almost all the pins brought out for 8-bit access it's just that one address line so should be right.

If you do this let us know how it goes.

Of course one might wonder why you need to use the SMC for an LCD, LCDs are normally as slow as a wet week so memory-mapping one wouldn't help I think.

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Rob
Rob Gray aka the GRAYnomad www.robgray.com

UnaClocker

Looks like a good opportunity for a third party vendor to create a board using the Due's chip, but wired up for the hardcore extreme user. Rather than cloning the Due, it'd be an innovative evolution.
Brian from Tacoma, WA
Arduino evangelist - since Dec, 2010.

Graynomad

Quote
Looks like a good opportunity for a third party vendor to create a board using the Due's chip, but wired up for the hardcore extreme user. Rather than cloning the Due, it'd be an innovative evolution.

I actually did just that when they first announced the Due, had the PCB laid out and everything. But I used the 3U because that's what they said they were using. Then they changed to a 3X and I didn't have the energy to re do it :)

I brought out ALL the signals (IIRC) with a form factor that allowed a lot of the board edge for user connectors and various modes that allowed addressing on the backplane etc. It also used the great power control ability the SAM has to shut down the board and save power. Plus it could control about 6A of external power.

Here's a render of the finished PCB



So yes, I think there is an opportunity for a bright young lad to make a "pro" version.

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Rob
Rob Gray aka the GRAYnomad www.robgray.com

Constantin

Rob, that is not only beautiful but impressive as it gets.

Graynomad

Thanks, it was pretty packed, 2.2" sq, 4 layers with almost as many components on the other side IIRC.

Shame to wast all that time, maybe I should re-jig it to use the 3X...I feel exhausted just thinking about it :)

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Rob
Rob Gray aka the GRAYnomad www.robgray.com

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