DDR2 Calibration and Stress Test for i.MX28

arunachalamrama — Tue, 09 Feb 2016 12:41:27 GMT

Hello

I am trying to run OBDS on a i.MX28 custom board with new DDR2 SDRAM.

Please share link or file for:

1. Correct version of DDR2 Register Programming Aid (xlsx file) for i.MX28

2. Correct version of DDR2 Calibration Test for i.MX28

3. Correct version of DDR2 Stress Test for i.MX28

Thanks,

Arun

Re: DDR2 Calibration and Stress Test for i.MX28

Yuri — Wed, 10 Feb 2016 01:32:35 GMT

Hello,

Please look at my comments below.

Please refer to the following :

Board Bring-up and DDR Initialization Tools

There are the echo gating output and feedback signals (EMI_DDR_OPEN and EMI_DDR_OPEN_FB),
used by the DRAM PHY to put a window around the DQS transition. They should be routed so that
length of trace from DDR_Open to DDR_Open_FB is mean ( EMI_CLK+EMI_CLKn , DQS0+DQS0n, DQS1+DQS1n ).

Some calibration procedure could help in case of EMI_DDR_OPEN and EMI_DDR_OPEN_FB signals violation,
but we do not have such code for calibration.

We do not have the Stress Test for I.MX28, but the following thread contains "mem_test",

which is based on FSL / NXP codes, used for DDR stress tester of i.MX6.

Re: i.MX28 DDR stress test

The Code Sourcery (Mentor) toolchain (host – Windows, executable (.elf)

image – for bare metal) was used to build it. As I know, such release is not

available now on Mentor web. You may try other GNU compiler.

One can try to load the test via a JTAG debugger (test.elf file should be used

here) or it is possible to load and run the test (test.sb) via USB in i.MX28 recovery

mode. Please use usb_load.bat for it. Note the sources contain memory initialization

for i.MX28 EVK. Perhaps it is needed to modify initialization for specific board.

Have a great day,
Yuri

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i.MX ProcessorsのトピックDDR2 Calibration and Stress Test for i.MX28

DDR2 Calibration and Stress Test for i.MX28

Re: DDR2 Calibration and Stress Test for i.MX28