Hi team, could help me with this problem.
DRV8243 SPI-P variant have VDD pin but SPI-S variant not. customer want to know if powering on or off VM will result in data lost or reset of SPI? from where I am standing, as to SPI-P variant, VM is only motor power supply, the other internal power is form VDD, and VM is independent of VDD, so powering on or off VM haven't influence on SPI data. but for SPI-S variant, VDD is from VM, so VM supply have influence on SPI data, right?