IMX8M PLUS and PMIC ( PCA9450CHN )

[KannanS1]

Hi,

I have designing IMX8 M plus processor SOM module and I changed possible power rails1.8V to 3.3V like NVCC_I2C_UART , NVCC_SAI2_SAI3_SPDIF etc...

For IMX8 M PLUS NXP development board all power logic is 1V8 and PMIC( PCA9450CHN) with I2C control. This I2C controlling by the processor and power pin is NVCC_I2C_UART with same PMIC power rail is connected to BUCK5 @ 1V8.

In my design, NVCC_I2C_UART power rail has been changed BUCK5 @1V8 to BUCK4 @3V3 same PMIC and made it I2C level shiftier for PMIC to Processor between.

Could you please help me out , Level shiftier will be affected any operation system level ?

Thanks

kannan

[KannanS1]

Thanks for reply.

Problem is resolved 

[jimmychan]

Hello,

1. For NVCC_I2C_UART pin, it is no problem using BUCK4@3V3.
2. The following pins IO level will 3.3V if NVCC_I2C_UART is supplied by BUCK4@3V3.
3. No problem using the BUCK4@3V3 for level shifter.