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Adventurer
Adventurer
240 Views
Registered: ‎02-13-2019

Memory controller frequency

Hi, I'd like to solve some doubts about the working of the MIG. 

I'm using the kc705 board and a MIG in order to send commands to the DDR3 memory (the max frequency of the memory is 800 MHz). but I do not know the next:

 

1- If the max frequency of the memory of my board is 800 MHz, why can just the controller work at 1/4 or 1/2 of that frequency of the memory? why can not the controller work at 800MHz as the DDR3 memory does?

 

thank you

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2 Replies
Xilinx Employee
Xilinx Employee
164 Views
Registered: ‎03-04-2018

Re: Memory controller frequency

Hello jose096

 

I think that the answer is in the PG150.  Could you please confirm it.

https://www.xilinx.com/support/documentation/ip_documentation/ultrascale_memory_ip/v1_4/pg150-ultrascale-memory-ip.pdf

 

Best regards,

kshimizu

 

Product Application Engineer Xilinx Technical Support

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ddr_phy.png
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Xilinx Employee
Xilinx Employee
45 Views
Registered: ‎03-04-2018

Re: Memory controller frequency

@jose09621 ,

PG150 is for UltraScale Architecture FPGAs Memory Product Guide. However in your case, you are using 7 Series Decease. Please refer to UG586. I think that following description is your answer.

 

Best regards,

kshimizu

 

Product Application Engineer Xilinx Technical Support

-------------------------------------------------------

Kindly note- Please mark the Answer as "Accept as solution" if information provided is helpful.  Please Give Kudos.

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phy.png
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