Xilinx VCU128 User Manual

Figure 6: Encryption Key Backup Circuit
X21956-112918
The Seiko TS621E rechargeable 1.5V lithium buon-type baery B1 is soldered to the board
with the posive output connected to the XCVU37P device U1 VBATT pin BD13. The baery
supply current IBATT specicaon is 150 nA maximum when the board power is o. B1 is
charged from the VCC1V8_BUS 1.8V rail through a series diode with a typical forward voltage
drop of 0.38V and 4.7 KΩ current limit resistor. The nominal charging voltage is 1.42V.
I/O Voltage Rails
There are 12 I/O banks and 2 high-bandwidth memory (HBM) banks available on the XCVU37P
device. The VCU128 board does not use the HBM banks. The voltages applied to the FPGA I/O
banks on the VCU128 board are listed in the following table.
Table 5: I/O Bank Voltage Rails
FPGA (U1) Bank Power Supply Rail Net Name Voltage
Bank 0 VCC1V8 1.8V
HP bank 64 DDR4_VDDQ_1V2 1.2V
HP bank 65 DDR4_VDDQ_1V2 1.2V
HP bank 66 DDR4_VDDQ_1V2 1.2V
HP bank 67 VCC1V8 1.8V
HP bank 68 QDR4_VDDQ_1V2 1.2V
HP bank 69 QDR4_VDDQ_1V2 1.2V
HP bank 70 QDR4_VDDQ_1V2 1.2V
HP bank 71 VADJ 1.8V
Chapter 3: Board Component Descriptions
UG1302 (v1.0) December 21, 2018 www.xilinx.com
VCU128 Board User Guide 19
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Xilinx VCU128 Specifications

General

Brand	Xilinx
Model	VCU128
Category	Motherboard
Language	English