Is there any calculation tool of DRAM bus length for i.MX7ULP ?

cancel
Showing results for 
Search instead for 
Did you mean: 

Is there any calculation tool of DRAM bus length for i.MX7ULP ?

153 Views
ko-hey
Senior Contributor II

Hi all,

 

I'll building a custom board with i.MX7ULP.

I understand that the wiring of each DDR signal line (the wiring from the CPU BGA pad to the DDR BGA pad) must be of equal length.

 

Is there any information about the wiring length inside the CPU (the wiring length from the DDR controller inside the CPU to the BGA PAD) ?

Or is there any calculation tool of DRAM bus length for i.MX7ULP ?

I found following check sheet but it's for i.MX6.

https://community.nxp.com/docs/DOC-93819

 

Ko-hey

Labels (1)
0 Kudos
1 Reply

102 Views
Yuri
NXP TechSupport
NXP TechSupport

Hello,

   It is recommended to use section 3.4.1 (DDR routing rules) of the

Hardware Development Guide for the i.MX 7ULP.

https://www.nxp.com/webapp/Download?colCode=IMX7ULPHDG 

It is quite enough for practical purposes.

Regards,

Yuri.

0 Kudos