IMX6 MMDC fast or slow precharge PD?

[timharvey]

The spreadsheet/script in https://community.freescale.com/docs/DOC-94917 sets MDPDC bit7 SLOW_PD=0 indicating fast precharge PD mode, yet the MR0 value written to the DRAM sets bit12=0 indicating slow precharge PD. The TRM states in the description of MDPDC SLOW_PD that it should be set the same as memory (which makes sense). Therefore I believe the spreadsheet/script to be in error.

Does Freescale have any recommendations on if the values should be set to fast precharge PD or slow?

Regards,

Tim

arpan_chakravarty

Kevin Wong

LinWang

gateworks

proven_partner

[LinWang · Accepted solution]

Sorry for pending a long time.

The configuration should be aligned on both controllor and DDR device side.

Fast or slow mode should depend on real application, that's a trage off between power consumption and working efficiency.

Thanks for digging it out!

[LinWang]

Had Involved design team.

Due to NPI urgent schedule, will check this question next week.

Suppose getting update before end of next week.