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Zynq Ult MPSoC SOM Hardware User Guide
iWave Systems Technologies Pvt. Ltd.
2.3.5
MPSoC Boot Mode Switch
The Zynq Ult MPSoC always boots from PS first and configures the PL through software. MPSoC can support
eMMC, SD1, USB0 & JTAG as boot device and configurable through mode pins. Upon device reset, MPSoC mode pins
are read to determine the primary boot device.
The Zynq Ult MPSoC SOM supports Boot Mode switch (SW1) to select the required boot device. By default,
eMMC is supported as boot device. Refer the below table to select the required boot device.
Table 4: Boot Mode Switch Truth Table
Zynq Ult
MPSoC Boot Mode
SW1 (4 Position Switch)
PS Mode 3
PS Mode 2
PS Mode 1
PS Mode 0
Switch Position Image
PS JTAG
OFF
OFF
OFF
OFF
SD1
OFF
ON
OFF
ON
eMMC
(Default)
OFF
ON
ON
OFF
USB0
OFF
ON
ON
ON