Version 1.0
Page 42
Bank 0
VCCADC
VREFP
VREFN
DXP
DXN
GNDADC
VCCAUX
TI REF3012
1.25V @10 mA
VN
VP
S
Y
S
M
O
N
J
X
C
o
n
n
e
c
to
r
100
2.7
nF
3.3V
VREF
100
20.5K
20.5K
Figure 19
– UltraZed-EG SOM SYSMON Circuit
The following table shows the SYSMON interface connections to the JX2 connectors. Note: The SYSMON
header is to be implemented on the end-user carrier card.
Table 33
– UltraZed-EG SOM SYSMON Connections
MPSoC Pin # UltraZed-EG SOM Net Name JX2 Pin #
P12
SYSMON_V_N
1
N13
SYSMON_V_P
3
R12
SYSMON_DX_N
2
R13
SYSMON_DX_P
4
2.15.7 Battery Backup
– Device Secure Boot Encryption Key
The Zynq Ult MPSoC power rail
+PS_VBATT
is a 1.0V to 1.89V voltage typically supplied by a
battery. This supply is typically used to maintain an encryption key in battery-backed RAM for device secure
boot. The encryption key can alternatively be stored in eFuse which does not require a battery.
On the UltraZed-EG SOM,
+PS_VBATT
is interfaced to the JX3 connector relying on the end-user carrier
card to properly implement the battery functionality. To apply an external battery to Zynq Ult
MPSoC from the end-user carrier card the proper voltage should be applied to the
+PS_VBATT
pin on the
JX3 connector,
JX3-PIN 46
.
Table 34
– UltraZed-EG SOM +PS_VBATT Connection
MIO NAME
PACKAGE PIN NUMBER
NET NAME
JX3 CONNECTOR
VCC_PSBATT
N19
+PS_VBATT
JX3.46
NOTE: When the final solution does not require battery backup, the end-user carrier card should tie
the +PS_VBATT pin to the appropriate voltage range from +1.0V to +1.8V.