AnsweredAssumed Answered

ZQ Calibration of i.MX6

Question asked by Zongbiao Liao on Sep 14, 2016
Latest reply on Sep 19, 2016 by igorpadykov

Hello Community


In page 11 of AN4467(i.MX 6 Series DDR Calibration) , there is description  as bellow.


ZQ calibration is a process that tunes the DRAM and MMDC I/O Pad output drivers (drive strength) and
ODT values across changes in process, voltage, and temperature.



After ZQ calibration, we can read ZQ_HW_PD_RES and ZQ_HW_PU_RES fields of the MPZQHWCTRL register.

How does ZQ_HW_PD_RES and ZQ_HW_PU_RES relate to DSE field of IOMUX control register and DDR ODT?

That is how should I set DSE filed and MMDC_MPODTCTRL register according to the ZQ result.


Thank you!