Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
10 years ago

Arria10 HPS Fpga to Sdram cannot be configured above 64 bits

Hi All, I want to use the fpga to sdram path in Arria 10 HPS. I want to connect a 256bit AXI interface operating at 125 Mhz from a third party IP to this port. I had a couple of questions: ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
10 years ago

--- Quote Start ---

ganeshmirajkar -

You're talking about the three FPGA to HPS SDRAM interfaces, correct? If you select Port Configuration 3 in the HPS parameter editor then the F2SDRAM 0 and F2SDRAM 2 interfaces are both 128 bits wide, and F2SDRAM 1 is disabled. If you select Port Configuration 4 then F2SDRAM 0 is 128 bits, F2SDRAM 1 is 32 bits, and F2SDRAM 2 is 64 bits. So you're correct that you can't get 256 wide on one port, but you can get 128 wide. And if using two ports will work for your application then you can get 256 wide by using F2SDRAM 0 and F2SDRAM 2 in Port Configuration 3.

By the way, the ES1 marking should be on the device package if you can see it.

Bob

--- Quote End ---

Yes. You are right, But the thing is I cannot select port3 or port1 configuration for this device. It is disabled. This is because there is some problem with that device and they have disabled all option which allow you to go above 64bit.