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Zynq Ult MPSoC SOM Hardware User Guide
iWave Systems Technologies Pvt. Ltd.
2.3.4
MPSoC Configuration & Status
The Zynq Ult MPSoC uses multi-stage boot process that supports both a non-secure and a secure boot. The
PS is the master of the boot and configuration process. Upon reset, device executes code out of on-chip ROM and
copies the first stage boot loader (FSBL) from the boot device to the on-chip RAM. The FSBL initiates the boot of the
PS and can load and configure the PL or configuration of the PL can be deferred to a later stage.
The Zynq Ult MPSoC SOM supports two LEDs (D6 & D5) for the MPSoC error status indication namely
PS_ERROR_OUT and PS_ERROR_STATUS. LED D6 is for PS_ERROR_OUT and it is asserted for accidental loss of power,
a hardware error, or an exception in the PMU. LED D5 is for PS_ERROR_STATUS and it indicates a secure lockdown
state. Alternatively, it can be used by the PMU firmware to indicate system status.
Figure 4: Error Status Indication LEDs