== Power Supply Unit (PSU) and recommended power-up sequence ==
Implementing correct power-up sequence for Zynq-based system is not a trivial task because several power rails are involved. Bora/BORA Lite SOM simplifies this task and embeds all the needed circuitry. The following picture shows a simplified block diagram of power supply subsystem.
For more details about this matter, please refer to AR #65240<ref name="AR65240">http://www.xilinx.com/support/answers/65240.html</ref> and XCN15034<ref name="XCN15034">http://www.xilinx.com/support/documentation/customer_notices/xcn15034.pdf</ref>.