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Altera_Forum
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18 years ago

DDR2 Read-Write-Read-Write Example

Hello, I'm looking over the DDR and DDR2 SDRAM Controller Compiler User Guide and my question is on page 3-30. Here they show a Read-Write-Read-Write example and we see that is the order of the local...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
18 years ago

The memory actions are in the same order as requested at the local interface. But local_wdata_req occurs before physical write and local_rdata_valid after physical read. As a consequence, you have to process read and write pipeline independantly at the local interface.