Dear support,
34.5.166 PHY Register 03 (DDRMC_PHY03)
34.5.167 PHY Register 04 (DDRMC_PHY04)
I do not know DDR3 SDRAM to be used is determined whether this register value in any timing.
Please tell me by a name defined in JEDEC.
Best regards,
Keisuke Watanabe
Solved! Go to Solution.
Hello keisukewatanabe
As for phy03, this is an internal parameter for the DLL inside the phy controller. It does not correspond to any JEDEC parameter. I have done some tests where I automatically test all the different values for the stat point to find out which work best, my results indicate that DDR_PHY003 = 0x00000020 other values near that may work but I recommend you to use that one.
For phy04, I could not find a direct relationship between from a JEDEC timing because I understand that DQS is expected to be 90 degrees aligned to the DQ signals. So this parameters helps to fine tune this alignment. The recommendation is using a value of 0x20 as in: DDR_PHY004 = 0x00002000 although other values may work, as soon as you start deviating far from this centered value it may fail. More details already found at https://community.freescale.com/thread/311918
best regards,
Ioseph
Hello keisukewatanabe
As for phy03, this is an internal parameter for the DLL inside the phy controller. It does not correspond to any JEDEC parameter. I have done some tests where I automatically test all the different values for the stat point to find out which work best, my results indicate that DDR_PHY003 = 0x00000020 other values near that may work but I recommend you to use that one.
For phy04, I could not find a direct relationship between from a JEDEC timing because I understand that DQS is expected to be 90 degrees aligned to the DQ signals. So this parameters helps to fine tune this alignment. The recommendation is using a value of 0x20 as in: DDR_PHY004 = 0x00002000 although other values may work, as soon as you start deviating far from this centered value it may fail. More details already found at https://community.freescale.com/thread/311918
best regards,
Ioseph