how to config interface voltage of DDR when we want to modify the hardware from LPDDR4 to DDR4 or DDR3L?

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how to config interface voltage of DDR when we want to modify the hardware from LPDDR4 to DDR4 or DDR3L?

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anhui527
Contributor III

hi,experts

   we want to modify our hardware board from original LPDDR4 to DDR4 or DDR3L , we checked the design guide , we found that DDR_SEL(attatched) is used to config the voltage of DDR interface , but i can not find this pin in the pin layout. could you please help us to find where is the DDR_SEL pin or how to do when we want to modify the hardware from LPDDR4 to DDR4 or DDR3L?

thanks.

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Yuri
NXP TechSupport
NXP TechSupport

Hello,

  Proper DRAM supply and reference voltages should be applied externally, according to "Operating ranges"

of the Datasheet for the following parameters: VDD_DRAM, VDDA_DRAM, NVCC_DRAM, DRAM_VREF.

 

  DDR_SEL is misprint here. DDR_SEL is software parameter, used in i.MX6.

 

Have a great day,

Yuri.

 

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Yuri
NXP TechSupport
NXP TechSupport

Hello,

  Proper DRAM supply and reference voltages should be applied externally, according to "Operating ranges"

of the Datasheet for the following parameters: VDD_DRAM, VDDA_DRAM, NVCC_DRAM, DRAM_VREF.

 

  DDR_SEL is misprint here. DDR_SEL is software parameter, used in i.MX6.

 

Have a great day,

Yuri.

 

-------------------------------------------------------------------------------

Note:

- If this post answers your question, please click the "Mark Correct" button. Thank you!

- We are following threads for 7 weeks after the last post, later replies are ignored

Please open a new thread and refer to the closed one, if you have a related question at a later point in time.

View solution in original post

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anhui527
Contributor III

Hi,Yuri Muhin

   thanks. i got it.

and does NXP have the reference design used DDR4 for i.MX8M ?

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Yuri
NXP TechSupport
NXP TechSupport

Hi,

  the DDR4 is available under NDA. Create request for it. 

~Yuri.