hi,all Now i use a ddr mem controller IP ,and this IP's interface is denalli DFI interface; but altmemphy's interface is AFI; how can i use altmemphy connect with my ddr mem controller IP in altera fpag simulation; thanks!

Do you have answer about which DFI spec. the AFI compliant with?

Does your controller use the training features of the DFI interface? If so you cant use it with AFI as AltMemPHY's calibration is enclosed within the PHY. Other than that the signals pretty much line up one to one. I think there is one extra signal left in AFI but that can easily be generated in logic. Why do you want to use Denali controller? Could you just use Altera's controller?

Hi, I also use DFI controller and with a DFI PHY on an upcoming ASIC. However, we would want to verify our system in FPGA. The PHY is afterall doing something related to timing but the actual protocol verification is on the controller. I would want to verify the system with my controller but using Altera PHY. To do it, I have to interface controller DFI to AFI Altera PHY. The DFI specs I am using is DFI2.0. I use Xilinx FPGA before and able to create a DFI wrapper onto xilinx PHY but my company wanted to move to Altera. I hope the team here can assist. Can you also supply me the link to see Altera AFI specs? The controller is DDR2 now and my upcoming one is DDR3. Do Altera FPGA support DDR3 PHY ? Hope to hear from you as soon as possible. Thanks! Mr Lim

DFI is not supported by Altera, you could possibly do it with restrictions, as mentioned above. Altera does have DDR3 PHY. 533MHz in Stratix IV AFI is documented in the EMI handbook on the web site.

altmemphy AFI and DFI | Altera Community

15 Replies

Altera_Forum
Honored Contributor
16 years ago
thanks for your explanation but what about the update interface of DFI interface (dfi_ctrlupd_req, dfi_phyupd_ack, etc.) ? it doesn't seems to be optionnal.
Altera_Forum
Honored Contributor
16 years ago
No, Altera's PHY solution doesn't have an equivalent feature or capability.

May I ask why would you need this?
Altera_Forum
Honored Contributor
16 years ago
Hi, thanks for your answer.

I don't know if I need update interface of the DFI 2.1 interface. I don't know if this interface is needed to have my ddr2 controller working.
Altera_Forum
Honored Contributor
15 years ago
Anybody connect DFI with ALTMEMPHY successfully?
What kind of ALTMEMPHY to choose, Half-Rate or full-rate?

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altmemphy AFI and DFI

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