Tool/software:
From what I can see in the data sheet, the VIO supply is responsible for the SPI and FLEXIO pin operation (and in our application this will be 3.3V). What I would like to do is use one of the FLEXIO pins to control the application of power to the other three Power pins (VCC, VCCA and VCCB which in our application, all these are 5.0V). For this to work, the VIO needs to power the SPI and FLEXIO pins (which it already does), and also needs to power the internal SPI and register control state machines (which I hope is the case, but it is not clear from the data sheet if this is true).
The question then comes down to this: if VIO is 3.3V and all other power pins are at 0V, does the SPI interface operate allowing correct control of the six FLEXIO pins?
Many thanks.
(For reference, the VIO supply is part of the MCU power domain, but VCC, VCCA and VCCB are all in the RF Amplifier control power domain, and it would be really nice to use the FLEXIO pins to control the power up and down of the complete RF control system).
