failed during ddr calibration

[jasperkim]

Hi all.

I am using IMX6 solo lite our custom board based on the MCIMX6SLEVK Board.

Our board structure was used same MCU and LPDDR2 part of reference board.

• our LPDDR2 part : MT42L256M32D2

Now I am having some problems on testing the DDR.

I have been trying to test calibration DDR2 on a DDR Test Tool with attached reference script file.

• tool : ddr_stress_tester_v2.40
• script : MX6SL_EVK_LPDDR2_512MB_32bit_v0.9.inc

But when I run DDR calibration, failed during ddr calibration on pc program.

Problem are as the below.

Message is "Error: failed during ddr calibration"

헤더 1

============================================         DDR Stress Test (2.4.0)         Build: Dec 11 2015, 11:13:44         Freescale Semiconductor, Inc. ============================================ ============================================         Chip ID CHIP ID = i.MX6 SoloLite (0x60) Internal Revision = TO1.2 ============================================ ============================================         Boot Configuration SRC_SBMR1(0x020d8004) = 0x00002c40 SRC_SBMR2(0x020d801c) = 0x01000001 ============================================ ARM Clock set to 1GHz ============================================         DDR configuration DDR type is LPDDR2 in 1-channel mode. Data width: 32, bank num: 8 Row size: 14, col size: 10 Both chip select CSD0 and CSD1 are used  Density per chip select: 512MB ============================================ Current Tempareture: 46 ============================================ DDR Freq: 396 MHz Note: Array result[] holds the DRAM test result of each byte.        0: test pass.  1: test fail        4 bits respresent the result of 1 byte.          result 0001:byte 0 fail.       result 0011:byte 0, 1 fail. Starting Read calibration... ABS_OFFSET=0x00000000 result[00]=0x1111 ABS_OFFSET=0x04040404 result[01]=0x1111 ABS_OFFSET=0x08080808 result[02]=0x1111 ABS_OFFSET=0x0C0C0C0C result[03]=0x1111 ABS_OFFSET=0x10101010 result[04]=0x1111 ABS_OFFSET=0x14141414 result[05]=0x1111 ABS_OFFSET=0x18181818 result[06]=0x1111 ABS_OFFSET=0x1C1C1C1C result[07]=0x1111 ABS_OFFSET=0x20202020 result[08]=0x1111 ABS_OFFSET=0x24242424 result[09]=0x1111 ABS_OFFSET=0x28282828 result[0A]=0x1111 ABS_OFFSET=0x2C2C2C2C result[0B]=0x1111 ABS_OFFSET=0x30303030 result[0C]=0x1111 ABS_OFFSET=0x34343434 result[0D]=0x1111 ABS_OFFSET=0x38383838 result[0E]=0x1111 ABS_OFFSET=0x3C3C3C3C result[0F]=0x1111 ABS_OFFSET=0x40404040 result[10]=0x1111 ABS_OFFSET=0x44444444 result[11]=0x1111 ABS_OFFSET=0x48484848 result[12]=0x1111 ABS_OFFSET=0x4C4C4C4C result[13]=0x1111 ABS_OFFSET=0x50505050 result[14]=0x1111 ABS_OFFSET=0x54545454 result[15]=0x1111 ABS_OFFSET=0x58585858 result[16]=0x1111 ABS_OFFSET=0x5C5C5C5C result[17]=0x1111 ABS_OFFSET=0x60606060 result[18]=0x1111 ABS_OFFSET=0x64646464 result[19]=0x1111 ABS_OFFSET=0x68686868 result[1A]=0x1111 ABS_OFFSET=0x6C6C6C6C result[1B]=0x1111 ABS_OFFSET=0x70707070 result[1C]=0x1111 ABS_OFFSET=0x74747474 result[1D]=0x1111 ABS_OFFSET=0x78787878 result[1E]=0x1111 ABS_OFFSET=0x7C7C7C7C result[1F]=0x1111 ERROR FOUND, we can't get suitable value !!!! dram test fails for all values. Error: failed during ddr calibration

We don't know what's the problem.

Please, give us some checking point.

And another question is

1. We use MT42L256M32D2 for DDR2. But I'm doubtful that part. Is MT42L256M32D2 is a same part, such as reference SDRAM on an evaluation board?  (i.MX6 solo lite)

2. If the same part, What part or point do I need to check next?

Any pointers would be of great help.

Original Attachment has been moved to: MX6SL_EVK_LPDDR2_512MB_32bit_v0.9.inc.zip

[igorpadykov · Accepted solution]

Hi Junsil

one can try to enter "MR1" value in GUI, one can find it

from MX6SL_EVK_LPDDR2_512MB_32bit_v0.9.inc.zip:

//=============================================================================
// LPDDR2 Mode Register Writes

//=============================================================================

setmem /32    0x021b001c =0x82018030     // MRW: BA=0 CS=0 MR_ADDR=1  MR_OP=see Register Configuration

MR1=0x82

Also it makes sense to test with 1.03 version of ddr test

https://community.freescale.com/docs/DOC-96412

1. it is the same part

2. please recheck ddr connections, testing signals with oscillosope

It makes sense to attach jtag and try read/write on single address.

Best regards

igor

-----------------------------------------------------------------------------------------------------------------------

Note: If this post answers your question, please click the Correct Answer button. Thank you!

-----------------------------------------------------------------------------------------------------------------------

[alubeiro]

Hi Igor,

We are also having a hard time making a DDR test with DDR test tool.

In our case we have a MCIMX6UL-EVK and a customized board.

I have some doubts. As i see in the correct answer of this post, the issue was solved making MR1=0x82 that is the correct value in the .INC file.

I have tried with the EVK and with a different value of which should be in MR1 gap. I put MR1=0006 and it should be 0004. The calibration completed successfully.

What is this parameter for? is it really matters?

Now we are trying with our board with no succsses.

I have to say that the MFGTool does not achieve to jump to OS image so i guess we are not able to do anything with this tool, right?

Thanks and best regards

[igorpadykov]

Hi Alberto

MR1 register is described in ddr datasheet. For custom

board suggest to check UG Ch.2 i.MX 6UltraLite design checklist

http://cache.freescale.com/files/32bit/doc/user_guide/IMX6ULHDG.pdf

then connect jtag and read/write patterns to memory, checking ddr signals

with oscilloscope.

>I have to say that the MFGTool does not achieve to jump to OS image so i guess we

>are not able to do anything with this tool, right?

right

Best regards

igor

[jasperkim]

Dear igor,

Hi, I always appreciate your great help.

Thanks. Have a good day.

Best regards

Junsil