Table 5: I/O Bank Voltage Rails (cont'd)
FPGA (U1) Bank
Power Supply Rail Net Name
Voltage
HP bank 72
VADJ
1.8V
HP bank 73
RLD3_VDDQ_1V2
1.2V
HP bank 74
RLD3_VDDQ_1V2
1.2V
HP bank 75
RLD3_VDDQ_1V2
1.2V
HBM_43 (not used)
VCCHBM/VCCAUX_HBM
1.2V/1.8V
HBM_83 (not used)
VCCHBM/VCCAUX_HBM
1.2V/1.8V
DDR4 Component Memory
, callout 4]
The 4.5 GB DDR4 component memory system is comprised of five 512 Mb x 16 DDR4 SDRAM
devices implemented in clam-shell fashion located at U17-U19 (top) and U73-U74 (bottom). Half
of the U19 16-bits are used (4.5 x 16-bits = 72-bit wide interface).
• Manufacturer: Micron
• Part Number: MT40A512M16LY-075E
• Description:
○
8 Gb (512 Mb x 16)
○
1.2V 96-ball TFBGA
○
DDR4-2666
The VCU128 XCVU37P FPGA DDR4 interface performance is documented in the Virtex
Ult FPGA Data Sheet: DC and AC Switching Characteristics (
).
The 72-bit wide DDR4 memory system is connected to XCVU37P U1 HP banks 64, 65 and 66.
The DDR4 0.6V VTT termination voltage (net DDR4_VTERM_0V6) is sourced from the TI
TPS51200DR linear regulator U71. The DDR4 memory interface bank VREF pins are not
connected, which, coupled with an XDC set_property INTERNAL VREF constraint, invoke the
INTERNAL VREF mode. The connections between the 72-bit interface DDR4 component
memories and XCVU37P banks 64, 65, and 66 are listed in the following table.
Chapter 3: Board Component Descriptions
UG1302 (v1.1) April 21, 2021
VCU128 Board User Guide
20