We are currently generating a DCD table for U-Boot using the iMX6UL DDR register programming aid. Our device is using an MT41K128M16JT-107 which is DDR3-1866 meaning it has a clock cycle frequency of 933MHz.
Using the programming aid, if I enter 933Mhz into the sheet, it calculates a clock cycle time of 1.071ns this causes the tRCD register value to go "#NUM!".
Does this mean I am using the wrong clock cycle frequency value or is it an issue with the spreadsheet?
Hello,
This is caused by the max operating frequency for DDR3 in i.MX6UL, please refer to datasheet:
Best regards.
