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Newbie brianwtec
Newbie
111 Views
Registered: ‎12-19-2018

Zync 7000 Family with Main Memory ECC

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I'm researching SOC solutions for a project I'm working on.

The project requires ECC DRAM for the main processor.

I have found techical notes and questions in the forums about using ECC on Zync 7000, but I haven't been able to confirm a few basic needs of the project:

1. Does the part support ECC on main memory?

2. Does it run full speed, or is there a speed limitation?

3. What is the typical width of main memory, is it 32 or 64 bits? In other words does it do 4 bit ECC or 8 bit ECC?

4. Is ECC a hard macro, a soft macro or a mix of the two?

I'd love some feedback from someone who's designed ECC onto a system with the Zync just to make sure the project is viable with Zync.

Thanks much.

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Explorer
Explorer
91 Views
Registered: ‎09-17-2018

Re: Zync 7000 Family with Main Memory ECC

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starting page 292 ug585

https://www.xilinx.com/support/documentation/user_guides/ug585-Zynq-7000-TRM.pdf

Table 10.1, page 295, 

"Total Data Width (bits) 16, 32 ECC can only use a 32-bit configuration: 16 data bits, 10 check bits"

l.e.o.

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Explorer
Explorer
103 Views
Registered: ‎09-17-2018

Re: Zync 7000 Family with Main Memory ECC

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https://www.xilinx.com/support/answers/58684.html

DDR only,  no ECC on OCM, nor caches.

l.e.o.

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Newbie brianwtec
Newbie
94 Views
Registered: ‎12-19-2018

Re: Zync 7000 Family with Main Memory ECC

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Thanks for responding.

I'm sorry, I wasn't clear. I wasn't asking about OCM. I was asking about the SOC's DDR main memory. Does that support full speed ECC DRAM? If so, what width is it?

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Explorer
Explorer
92 Views
Registered: ‎09-17-2018

Re: Zync 7000 Family with Main Memory ECC

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starting page 292 ug585

https://www.xilinx.com/support/documentation/user_guides/ug585-Zynq-7000-TRM.pdf

Table 10.1, page 295, 

"Total Data Width (bits) 16, 32 ECC can only use a 32-bit configuration: 16 data bits, 10 check bits"

l.e.o.

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Newbie brianwtec
Newbie
86 Views
Registered: ‎12-19-2018

Re: Zync 7000 Family with Main Memory ECC

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Thanks l.e.o. That answers my question.
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