Community
cancel
Showing results for 
Search instead for 
Did you mean: 
Highlighted
Valued Contributor III
675 Views

Problem DDR2 bandwidth

Hi, 

 

I'm working on the cyclone IV GX dev board and using DDR2 SDRAM for stocking images coming from a camera. 

 

In the documentation of the dev board, the maximum theoretical bandwidth of the DDR2 is 10.6Gbps. But in my case, i have just 200Mbps when i read from DDR2. this is a problem because i have under 10ms to process two images (752x480). 

 

Of course, I use burst. 

 

I'm using the "DDR2 SDRAM-controller with ALTMEMPHY" to control the DDR2. 

 

I have posted my SDRAM-controller configuration to help you. 

 

Does anyone know why the bandwidth is very bad? 

 

Thanks 

hallodu
0 Kudos