Hi Fabio / Stefano,
May be you could help me to get some answer regarding with calibrations value for DDR.
I have a 4 custom boards based on iMX6SL (2) Micron DDR and (2) Samsung DDR.
The boards has exact DDR footprints (like density, bus width and so on). In fact the uboot that I am using works on both DDR chips.
I re-ran the DDR tools twice for each boards, entered the same information. The tools returned different calibration values for each boards but, the two results for each boards were the same.
e.g: board1
Read DQS Gating calibration MPDGCTRL0 PHY0 (0x021b083c) = 0x412C0130 MPDGCTRL1 PHY0 (0x021b0840) = 0x01140118
Read calibration MPRDDLCTL PHY0 (0x021b0848) = 0x3E404244
Write calibration MPWRDLCTL PHY0 (0x021b0850) = 0x383C3E36
board2:
Read DQS Gating calibration MPDGCTRL0 PHY0 (0x021b083c) = 0x412C0130 MPDGCTRL1 PHY0 (0x021b0840) = 0x01140118
Read calibration MPRDDLCTL PHY0 (0x021b0848) = 0x3E3E4244
Write calibration MPWRDLCTL PHY0 (0x021b0850) = 0x383C3E36
Is there any procedures or rules of thumb you follow dealing with the calibration settings?.
Regards,
John