topic Re: iMX7D 16-bit DDR3 Implementation Issue in i.MX Processors

iMX7D 16-bit DDR3 Implementation Issue

x10 — Tue, 02 Dec 2025 07:47:12 GMT

Hi, NXP team

Does iMX7D support 16-bit DDR3 implementation? In RM DDRC_MSTR[13:12] = DATA_BUS_WIDTH = 2'b01: Half DQ bus width to SDRAM-DRAM_DATA[15:0], it seems that DDRC can work with 16-bit DDR3 chip, but it doesn't work with my test. I just want to make sure if iMX7D DDRC can work with 16-bit DDR3 or not, otherwise something wrong in my test.

Thanks!

Cheng Shi

Re: iMX7D 16-bit DDR3 Implementation Issue

JorgeCas — Tue, 02 Dec 2025 15:34:48 GMT

Hello,

i.MX7D supports 16/32-bit DDR3L/LPDDR2/LPDDR3-1066 memories.

You can configure this directly in RPA when doing the DDR stress test.

Best regards.

Re: iMX7D 16-bit DDR3 Implementation Issue

x10 — Wed, 03 Dec 2025 07:49:13 GMT

Thanks for quick reply!

As my understanding, the ds file generated by MX7D_DDR3_Register_Programming_Aid_V1_3 can been used to setup 16-bit DDR3(single chip). Is that right?

Regards

Cheng Shi

Re: iMX7D 16-bit DDR3 Implementation Issue

JorgeCas — Wed, 03 Dec 2025 17:17:43 GMT

Hello,

Yes, your understanding is correct.

Best regards.