IMX8QX DDR3L/DDR3 application design

[alexjiang]

Hi，

    Our design platform ：IMX8QX : MIMX8QX6AVLFZAC  +  16bit DDR3L/DDR3.

    IMX8QX support 32bit+8bit DDR3L. But we need only 1pcs 16bit DDR3L. 

1. Can we design with only 1 pcs 16bit DDR3L(lower 16 bit), and leave 16~40bit DQ floating?

2. Whether IMX8QX support DDR3 voltage level: 1.5V?

[KalaimaniArumugamdev]

Hi @alexjiang 

Q1: Can we design with only 1 pcs 16bit DDR3L(lower 16-bit), and leave 16~40bit DQ floating?

Ans: Yes, You can use 16bit addressing and leave 16~40bit DQ as a float. Because MMDC is a multi-mode DDR controller that supports DDR3/DDR3L at 16bit mode.

Q2:Whether IMX8QX support DDR3 voltage level: 1.5V?

Ans: Yes, Refer to datasheet page number 13.

[alexjiang]

Hi,

 @KalaimaniArumugamdev 

Q2:Whether IMX8QX support DDR3 voltage level: 1.5V?

the picture show IMX8QX VDD/VDDQ  I/O  support DDR3L:1.35V, MAX  DDR3L voltage :1.45V. 

and IMX8QX datasheet does not show whether support  DDR3: 1.5V, 1.425~1.57V(DDR3 voltage range),

only show DDR PHY supplies  VDD_DDR_VDDQ max：1.75V.  Does it means that we can use DDR3 IC and supply 1.5V voltage to VDD/VDDQ?  

[riteshmpatel]

Hi @alexjiang,

i.MX8QXP supports DDR3L and LPDDR4 only.

Thanks & Regards,
Ritesh M Patel