Monitor Supply Voltages

Zynq UltraScale+ Device Technical Reference Manual (UG1085)

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2.3 English

Direct measurement of voltages reaching the silicon die enable the SYSMON unit to confirm the integrity of the external power supplies and the associated power distribution networks. For example, the SYSMON unit can detect voltage drops caused by the combination of high current demand and resistance in the path between the power supply and the silicon die. Similarly, the monitoring and recording of the supply voltages over a longer time (e.g., hours or years), can reveal drift in the output voltage of a power supply caused by temperature fluctuations or aging. In both cases, the supply voltages measured by the SYSMON unit can be used to fine tune the power supply controllers or report the information for further investigation (e.g., at the next scheduled service of the product).