AnsweredAssumed Answered

Power Group Conflict

Question asked by Sumant Khalate on Jul 9, 2019
Latest reply on Jul 11, 2019 by Yuri Muhin


I'm interfacing an eMMC chip to the i.MXRT1062 controller using USDHC2 peripheral. For the eMMC to support HS200 mode the VDDQ Voltage(I/O Voltage) of eMMC need to be between 1.7V–1.95V i.e 1.8V.

I can change the NVCC_SD1 voltage to 1.8V and can get away with it, but it looks like the CSX,1 pin from SEMC also uses this voltage group(The rest of SEMC pins uses 3.3V).

There is no other option available for me to change the MUXing of CSX,1 or use any other CSX as all other pins have been consumed.

So my questions are,

1. Why isn't the tool generating a warning when the SEMC is using 2 different voltages?

2. Is there any way out? apart from using a hardware voltage level converter at CSX,1 to make it 3.3V compatible