DDR Stress Tester

[shojigoto]

Is the DDR Stress Tester able to be available on the i.MX6Q without any boot program installed?

We are now facing a problem of DDR reset from i.MX6 being never deassetred after power-on, and

so the DDR stress Tester fails in executing DDR Calibration.

Regards,

Shoji

[igorpadykov]

Hi Shoji

one can use jtag version

i.MX6/7 DDR Stress Test Tool V2.20

also pin DRAM_RESET after power-up is low according to Table 100. 21 x 21

mm Functional Contact Assignments (continued) i.MX6DQ Datasheet (rev.4, 7/2015)

http://cache.freescale.com/files/32bit/doc/data_sheet/IMX6DQCEC.pdf

Best regards

igor

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[shojigoto]

Hi igor,

Thank you for your reply.

I found that a power line NVCC_LVDS_2P5 is left open on our board.

Could you tell me whether accessing to the DDR3 is possible in that case?

Regards,

Shoji

[igorpadykov · Accepted solution]

Hi Shoji

from i.MX6DQ Datasheet (rev.4, 7/2015) Table 6. Operating Ranges :

This supply also powers the pre-drivers of the DDR I/O pins; therefore,

it must always be provided, even when LVDS is not used.

http://cache.freescale.com/files/32bit/doc/data_sheet/IMX6DQCEC.pdf

~igor