DDR test, not understanding a parameter

Fred_Jutras — Wed, 03 Mar 2021 16:29:50 GMT

Hi and good day,

I am using the IMX6DL with MT41K128M16JT-125 from Micron on one of our boards. The memory is a 2GB DDR3 128M x 16 x 8bank; 14 row addresses, 10 column addresses and we are using 4 of them with 1 CS to cover all 64 data lines.

When I enter those parameter into the DDR test, I received back that the DDR Density per Chip Select is 1024MB. I have the DDR density selection to Default but I can't change it. Why does it not shows 2048MB?

Also, when I run the SSR Stress Test it usually fails at the first frequency. But if I change the DDR Density for 512MB in the drop down menu (also need to update the data bus to 32 bits) I can run the calibration as well as the DDR Stress test without any issues.

Is there something I don't see/understand here?

============================================
DDR Stress Test (3.0.0)
Build: Dec 14 2018, 14:12:28
NXP Semiconductors.
============================================

============================================
Chip ID
CHIP ID = i.MX6 Solo/DualLite (0x61)
Internal Revision = TO1.3
============================================

============================================
Boot Configuration
SRC_SBMR1(0x020d8004) = 0x00007040
SRC_SBMR2(0x020d801c) = 0x29000001
============================================

ARM Clock set to 1GHz

============================================
DDR configuration
BOOT_CFG3[5-4]: 0x00, Single DDR channel.
DDR type is DDR3
Data width: 64, bank num: 8
Row size: 14, col size: 10
Chip select CSD0 is used
Density per chip select: 1024MB
============================================

Thanks for the help!

Fred

topic DDR test, not understanding a parameter in i.MX Processors

DDR test, not understanding a parameter