topic Re: misstake with my DDR3 calibration in i.MX Processors

misstake with my DDR3 calibration

zhangzhiyong1 — Sun, 20 Aug 2017 16:45:39 GMT

Today,I test my on board DDR3 with DDR_Stress_tools_V1.0.3 and DDR_Stress_tools_V2.7.0.My board used MT41K128M16JT-125K,The SCH please see the SCH.PDF.now I used the DDR tools, created inc file .named MYBOARD.inc

Then I used it in DDR_Stress_tools_V2.7.0

calibration result is on picture then I put the value in MYBOARD.inc, calibration it again

several timesand used the initial MYBOARD.incseveral times.

The rusults is all different.

in every times,After test,I put the all the value I got in Flash_header.S .it no work even got worse ,some result can`t standup kernel.

then I used DDR_Stress_tools_V1.0.3 ，The phenomenon is same.

MY Stress test used MX6Q_SabreSD_DDR3_register_programming_aid_v1.5.inc can do well

It debug print says "Stress test successful"

Is my calibration wrong ？？？If I wrong please tell me how to calibration it

My English is poor

thank you

Original Attachment has been moved to: ddr_calibration_20170820-16'50'34.log.zip

Original Attachment has been moved to: ddr_calibration_20170820-16'46'42.log.zip

Re: misstake with my DDR3 calibration

igorpadykov — Sun, 20 Aug 2017 23:21:36 GMT

Hi zhangzhiyong

please set MR1=4, description of usage of ddr tool can be found in presentation on

DES-N1936 i.MX 6UltraLite DDR Tools Overview and Hardware Design Considerations.pdf

for calibration explanation please check last comment on thread

Write Leveling register WL_SW_RESx

various ddr test errors are described on

Freescale i.MX6 DRAM Port Application Guide-DDR3

Best regards
igor
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Re: misstake with my DDR3 calibration

zhangzhiyong1 — Sun, 20 Aug 2017 23:53:45 GMT

Hi ,igorpadykov,How i can get it?

thank you

Re: misstake with my DDR3 calibration

zhangzhiyong1 — Mon, 21 Aug 2017 16:44:33 GMT

HI,It`s

MMDC registers updated from calibration

Write leveling calibration
MMDC_MPWLDECTRL0 ch0 (0x021b080c) = 0x0029002B
MMDC_MPWLDECTRL1 ch0 (0x021b0810) = 0x0034002D
MMDC_MPWLDECTRL0 ch1 (0x021b480c) = 0x000B0027
MMDC_MPWLDECTRL1 ch1 (0x021b4810) = 0x0014001B

Read DQS Gating calibration
MPDGCTRL0 PHY0 (0x021b083c) = 0x03480358
MPDGCTRL1 PHY0 (0x021b0840) = 0x033C0340
MPDGCTRL0 PHY1 (0x021b483c) = 0x03480348
MPDGCTRL1 PHY1 (0x021b4840) = 0x03300310

Read calibration
MPRDDLCTL PHY0 (0x021b0848) = 0x3A343238
MPRDDLCTL PHY1 (0x021b4848) = 0x38342E3C

Write calibration
MPWRDLCTL PHY0 (0x021b0850) = 0x4A443C38
MPWRDLCTL PHY1 (0x021b4850) = 0x4E44483E
the result is all upload to the Flash_header.S

If I upload More or less

thank you