Solution

The PS_POR_B signal can be used for work-arounds.

Because the PS MIO glitch occurs during the power-on sequence and because Zynq UltraScale+ requires a PS_POR_B input signal that is Low through the power-up sequence, the PS_POR_B signal can be leveraged for work-arounds.

For example:

• Use PS_POR_B to disable or to keep other connected devices in reset, which can prevent other devices from reacting to a potential PS MIO glitch.
• Use PS_POR_B with an external circuit to gate the PS MIO logic signal and prevent a possible glitch from affecting sensitive buses or device inputs.