Wake through GIC Proxy

Zynq UltraScale+ Device Technical Reference Manual (UG1085)

Document ID
UG1085
Release Date
2022-09-15
Revision
2.3 English

If the power down of an application processor is in conjunction with the power down of the entire FPD, an LPD device that is associated with that processor can still trigger a direct wake to that processor by first triggering the power up of the FPD. This is accomplished by having a GIC proxy block in the LPD that can have selected peripheral interrupts routed to the PMU as an interrupt other than the direct wakes.

Upon receiving an interrupt from the GIC proxy block:

1.The PMU powers up the FPD.

2.Releases the reset to the FPD and APU.

3.Unmasks the interrupts that trigger the direct wake of that application processor.

The direct wake will take effect resulting in the power up of the application processor.