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

[anhui527]

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.

[Yuri · Accepted solution]

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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[anhui527]

Hi,Yuri Muhin

   thanks. i got it.

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

[Yuri]

Hi,

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

~Yuri.