Xilinx ZCU102 User Manual page 23

Encryption Key Backup Circuit
The XCZU9EG MPSoC U1 implements bitstream encryption key technology. The ZCU102
board provides the encryption key backup battery circuit shown in
X-Ref Target - Figure 3-2
The Seiko TS518FE rechargeable 1.5V lithium button-type battery B1 is soldered to the
board with the positive output connected to the XCZU9EG MPSoC U1 V
The battery supply current I
B1 is charged from the UTIL_1V8 1.8V rail through a series diode with a typical forward
voltage drop of 0.38V and 4.7 ΩK current limit resistor. The nominal charging voltage is
1.42V.
ZCU102 Evaluation Board User Guide
UG1182 (v1.2) March 20, 2017
Figure 3-2: Encryption Key Backup Circuit
specification is 150 nA maximum when board power is off.
BATT
www.xilinx.com
Chapter 3: Board Component Descriptions
Figure 3-2
CC_PSBATT
Send Feedback
pin AA22.
23