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Adventurer
Adventurer
343 Views
Registered: ‎02-13-2019

Customizing a memory for the MIG

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Hi,

I'd like to ask the next: I want to use the DDR3 memory MT41K128M16JT-107 for the controller, but this part is not as an option in the MIG wizard. can I use the part MT41K64M16XX-107 and simply in the "Create Custom Part" edit the parameter "Row Address" to 14 bits?

thanks

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Moderator
Moderator
271 Views
Registered: ‎11-28-2016

回复: Customizing a memory for the MIG

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Hello @jose09621 ,

The easiest thing to do here is target an equivalent part that's already supported by the IP.

The MT41J128M16xx-107 is natively supported and entirely equivalent to the MT4K128M16JT-107 you want to use. 
If you use the native part then there are no other modifictions.
If you were to use a smaller part like the MT41K64M16XX-107 then you would have an incorrect tRFC.

Thanks,
Ryan

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Xilinx Employee
Xilinx Employee
307 Views
Registered: ‎08-21-2007

回复: Customizing a memory for the MIG

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Yes, you can. Please also modify the timig parameters accroding to the memory datasheet if necessay.

Moderator
Moderator
272 Views
Registered: ‎11-28-2016

回复: Customizing a memory for the MIG

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Hello @jose09621 ,

The easiest thing to do here is target an equivalent part that's already supported by the IP.

The MT41J128M16xx-107 is natively supported and entirely equivalent to the MT4K128M16JT-107 you want to use. 
If you use the native part then there are no other modifictions.
If you were to use a smaller part like the MT41K64M16XX-107 then you would have an incorrect tRFC.

Thanks,
Ryan

Adventurer
Adventurer
262 Views
Registered: ‎02-13-2019

回复: Customizing a memory for the MIG

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Hi @ryana than you for your help. Do you know what means the "K" in the MT4K128M16 and the "J"  MT41J128M16? 

 

thank you

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Moderator
Moderator
253 Views
Registered: ‎11-28-2016

回复: Customizing a memory for the MIG

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Hello @jose09621 ,

It means a different die revision for that specific memory device density and data width but functionally at a DDR3 protocol level these two parts are identical.  It usually means the physical dimensions of the total package footprint may change but the ball definition remains unchanged.  Here's a snippet from a DDR4 data sheet that shows all the different die revisions that show up in the part number.

die_revisions.PNG

Adventurer
Adventurer
241 Views
Registered: ‎02-13-2019

回复: Customizing a memory for the MIG

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Hi @ryana thank you for share your knowledge.  I didn't know that.

 

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