Scope of notes in register_programming_aid for the i.MX6 DDR Stress Test Tool

[torus1000]

Hi,

I'm checking DDR memory timings of my i.MX6Q board now.
I would like to change REF_SEL to choose 64kHz in terms of testing half refresh cycle of DDR3 memory.
Then I found a Note for REFR bit in MDREF register which described as following.

      MX6Q_SabreSD_DDR3_register_programming_aid_v2.3.xlsx
      https://community.nxp.com/docs/DOC-105963

      See $F$125;

"MDREF register setting. Note, only parameter REFR is programmable, all other parameters are fixed as follows:
REF_CNT: 0x0 (default value, parameter not used)
REF_SEL: 0x1 (choose 32KHz clock to trigger refresh cycle)
START_REF: Manually start refresh cycle, set to 0 for normal operations"

I'm confusing there is no such description in ref manual; REF_SEL is fixed.

(Q)  Scope of this Notes are just for the calibration purpose, right?
       (Can I ignore this Note when I test another DDR refresh rate?)

Can anyone help me?

[igorpadykov · Accepted solution]

Hi torus1000

>(Q)  Scope of this Notes are just for the calibration purpose, right?

right

>       (Can I ignore this Note when I test another DDR refresh rate?)

yes

Best regards
igor
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