Hi all :
I have been dealt with a problem of DDR2 for days. My board is equipped with two DDR2 Chips each of which is 128M. And the model is SAMSUNG K4T1G164QF-BCF7. I have used the DMA to test the rate of it. For 1M data, it cost 21ms.(so the rate is about 46Mb/s) It's too slow ! I think... I've configurated the registers of DDR controller in the code of UBL. Some of them are shown as following :
SDTIMR :0x656D8DDA
SDTIMR2 :0x4236C742
SDBCR :0x00D78832
DDRPHYCR :0x000000C5
But no matter how I change the value, the rate is still about 46Mb/s...So if I want to speed up the rate, what can I do for it ? Could anybody give me some advice ?
Thanks.