Some Cypress Flash Devices Provide VIO. What if VCC and VIO come from Different Supplies? - KBA203733

Version: *A

 

Question:

Some Cypress Flash devices provide the VIO option in addition to the VCC core voltage. What if VCC and VIO have separate supplies?

 

Answer:

In this case, the VIO and VCC supplies must comply with the power-up and power-down requirements defined in the datasheet. For the GL-S flash, VCC must be greater than VIO by at least 200 mV during the power-up ramp, until both voltages are no less than the minimum operating voltage.