I have a P4080DS board ,we have two questions about DDR Memory Controller register:
1. about 11.4.9 DDR SDRAM control configuration 2
in this regiser bit24-25 is reserved ,but when I set bit 24 -25 as 00,it doesn't work;when
I set bit 24-25 as 01 ,it work well.can you tell me why?
2.about 11.4.10 DDR SDRAM mode configuration
(DDRx_DDR_SDRAM_MODE) and 11.4.11 DDR SDRAM mode configuration 2
these two registers are very important for different DDR rate,but I don't know how to config them in different DDR rate, the P4080RM didn't give us a detail explain ,Please give us more detail information about these two registers.Thank u very much!!