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The choice of ODT impedance in RPA and DDR Tool

Question asked by George Fukutomi on Jul 29, 2019
Latest reply on Aug 5, 2019 by Oliver Chen

Dear Oliver Chen,

 

Our board design was done with ODT impedance 48 ohms for LPDDR4.

However, I can not find 48 Ohms in RPA and MSCALE_DDR_Tool_User_Guide provided by you.

 

RPAv23 :

 

 

DDR_Tool_User_Guide :

 

 

That seems to be the case in the LPDDR4 data sheet.

 

Does DDRTOOL work correctly when I set 48 Ohms in RPA?

 

Best Regards,

George

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