Alinx ZYNQ UltraScale+ User Manual page 26

PS System RTC Real Time Clock
The passive crystal Y1 on the core board provides a 32.768KHz real-time
clock source for the PS system. The crystal is connected to the PS_PADI_503
and PS_PADO_503 pins of BANK503 of the ZYNQ chip. The schematic
diagram is shown in Figure 2-6-2:
Figure 2-6-2: Passive Crystal Oscillator for RTC
Clock pin assignment:
PS_PADO_503
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ZYNQ Ultrascale + FPGA Board AXU9EG User Manual
Figure 2-6-1: Core Board Clock Source
Signal Name
PS_PADI_503
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Pin
V21
V22