[ This Figure , callout 3]
The 4 GB, 64-bit wide DDR4 memory system is comprised of four 512 Mb x 16 SDRAM, U80 and U94-U96.
• Manufacturer: Micron
• Part Number: MT40A512M16JY-075E
° 8 Gb (512 Mb x 16)
° 1.2V 96-ball TFBGA
The ZCU111 XCZU28DR RFSoC PL DDR interface performance is documented in the Zynq UltraScale+ RFSoC Data Sheet (DS926) [Ref 2] .
This memory system is connected to PL-side XCZU28DR banks 67, 68, and 69. The DDR4 0.6V VTT termination voltage is supplied from sink-source regulator U81.
The ZCU111 board DDR4 64-bit component memory interface adheres to the constraints guidelines documented in the PCB guidelines for DDR4 section of UltraScale Architecture PCB Design User Guide (UG583) [Ref 4] . The ZCU111 DDR4 component interface is a 40Ω impedance implementation. Other memory interface details are also available in the UltraScale Architecture-Based FPGAs Memory IP LogiCORE IP Product Guide (PG150) [Ref 5] . For more details, see the Micron MTA4ATF51264HZ-2G6E1 data sheet at the Micron website [Ref 16] .
The connections between the DDR4 component memories and the XCZU28DR banks are referenced in Design Constraints .