I have followed the tips,followed the caculate tools, seed spreadsheet. but still got the problem
the following is the picture of the momery. The red indicates the changed(because I have enable the continuous refresh) ,the address changed was randomized,
And if Changed the value of somewhere, the value of other place may be changed, this is what i saw.
in the tips, there are two cases between DDR_CK length and DDR_DQS length, but what will be result if DDR_CK length equal to DDR_DQS length?
Btw, I try to use different SDRAM drive strength, see the following picture:
FULL drive strength:
I have write the 0x12345678 to 0x80000000 and 0xdeadbeef to 0x8000000C.
the red shows the change between a second before, I think FULL drive strength may be better than 1/8 drive strength, because in am335x-evm, after initial the DDR2, the contents are different each other,it couldn't be 0xFF mostly.
Could you give any advice?
Thanks.
