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How to adjust i.MX8M-EVK PMIC power about LPDDR4 VDD1 and VDD2

Question asked by Alex Jiang on Mar 5, 2020
Latest reply on Mar 7, 2020 by Alex Jiang

How to adjust i.MX8M-EVK PMIC power about LPDDR4 VDD1 and VDD2

 

We use i.MX8M-EVK to test our LPDDR4,and we’d like to adjust the power of LPDDR4.

From the i.MX8M-ENK SCH,the PMIC: PF4210,and SW2 for LPDDR4 VDD2/VDD2(default 1.1v),SW4 for LPDDR4 VDD1(default 1.8v).

 

we want to test low voltage and high voltage,to adjust PMIC out of LPDDR4 power:

1) LV output:  SW2 output=1.05v,and SW4 output=1.7v.

in F4210 datasheet:

Set point=26 SW2[6:0]=0011010 SW2 output=1.05V

Set point=82 SW4[6:0]=1010010 SW4 output=1.7V

 

2)HV output: SW2 output=1.175V, and SW4 output=1.95V.

in F4210 datasheet:

Set point=31 SW2[6:0]=0011111 SW2 output=1.175V

Set point=87 SW4[6:0]=10101111 SW4 output=1.95V

 

If we use SDK uboot+kernel boot up, where can we to modify the PMIC set point to adjust PMIC power output, could you tell me which file? eg: xxpower.c file

 

If we use NXP MX8M DDR tool to test LPDDR4, where can we to modify the PMIC set point to adjust PMIC power output. As you know the tool only have .bin file for us, could you provide the HV output and LV output .bin file for us to test LPDDR4?

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