AnsweredAssumed Answered

DDR stress tester_v2.6 issue.

Question asked by Peter Amond on Mar 26, 2017
Latest reply on Mar 30, 2017 by Artur Petukhov

Dear All,

 

I'm using ddr_stress_tester_v2.60  software for memory calibration of Alliance AS4C256M16D3A-12BCN RAM included i.MAX6 Quad processor based custom hardware design. This is the script changes for Alliance RAM.

 

1. I got following error message from software.  As well as it says "Write leveling calibration completed, update the following registers in your initialization script " Is it possible to get 0x001F001F same calibration value for this ? Why is this happen ? 

 

ddr_mr1=0x00000004
Start write leveling calibration...
running Write level HW calibration
Write leveling calibration completed, update the following registers in your initialization script
MMDC_MPWLDECTRL0 ch0 (0x021b080c) = 0x001F001F
MMDC_MPWLDECTRL1 ch0 (0x021b0810) = 0x001F001F
MMDC_MPWLDECTRL0 ch1 (0x021b480c) = 0x001F001F
MMDC_MPWLDECTRL1 ch1 (0x021b4810) = 0x001F001F
Write DQS delay result:
Write DQS0 delay: 31/256 CK
Write DQS1 delay: 31/256 CK
Write DQS2 delay: 31/256 CK
Write DQS3 delay: 31/256 CK
Write DQS4 delay: 31/256 CK
Write DQS5 delay: 31/256 CK
Write DQS6 delay: 31/256 CK
Write DQS7 delay: 31/256 CK

Starting DQS gating calibration
. HC_DEL=0x00000000 result[00]=0x11111111
. HC_DEL=0x00000001 result[01]=0x11111111
. HC_DEL=0x00000002 result[02]=0x11111111
. HC_DEL=0x00000003 result[03]=0x11111111
. HC_DEL=0x00000004 result[04]=0x11111111
. HC_DEL=0x00000005 result[05]=0x11111111
. HC_DEL=0x00000006 result[06]=0x11111111
. HC_DEL=0x00000007 result[07]=0x11111111
. HC_DEL=0x00000008 result[08]=0x11111111
. HC_DEL=0x00000009 result[09]=0x11111111
. HC_DEL=0x0000000A result[0A]=0x11111111
. HC_DEL=0x0000000B result[0B]=0x11111111
. HC_DEL=0x0000000C result[0C]=0x11111111
. HC_DEL=0x0000000D result[0D]=0x11111111
ERROR FOUND, we can't get suitable value !!!!
dram test fails for all values.

Error: failed during ddr calibration

 

Regards,

Peter.

Outcomes