Re: slow reads from 21489 SDRAM?

Hi Dave,

If you are sequentially reading the data ( DMA reads or any back to back reads) you might benefit by enabling SDRAM Read Optimization. To achieve better performance, read addresses can be provided in a predictive manner to the SDRAM memory. This is done by setting (=1) SDROPT (bit 16) and correctly configuring the SDMODIFY bits (20–17) in the SDRRC register according to the core’s DAG modifier or the DMA’s modify parameter register. The predictive address given to the memory depends on the  SDMODIFY  bits values.

Regards,

Jithul