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Using both SDRAM of DE2-115

Altera_Forum
Honored Contributor II
‎02-04-2016 12:27 PM
1,058 Views

I've read that the DE2-115 board has two SDRAM chips.. I've used one of this (sdram_control_4port) to store the odd and even lines of the tv decoder i've used using Verilog. My problem now is that i need another storage for the processing of my image and i dont know how i can use the other SDRAM. Can anyone help me with this? Thank you in advance.

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Altera_Forum
Honored Contributor II
‎02-04-2016 01:28 PM
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The two devices share all their control signals (with the exception of their data mask 'DQM' signals). So, the two SDRAM devices are always accessed together. 

 

There is a 32-bit data bus split across the two devices - 16-bits per device. Use of the data mask could result in 1, 2, 3 or 4 bytes being written/read during any single access. 

 

How wide is the data bus that you're currently using? Are you sure you've only "used one"? 

 

Cheers, 

Alex
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