Power Domains - Texas Instruments C2000 F28P55 Series User Manual

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2.1.1 Functional Description and Connections

2.1.1.1 Power Domains

The F28P55x LaunchPad has several power domains that can be connected or isolated from each other with
removable shunts. The different 3.3V and 5V power domains are further described in
+5V0_USB
USB Type-C™
Conn
SPRUJC0 – APRIL 2024
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USB
Isolator
Device
+5V0_XDS110
+5V0
Shunt 1
JP1
+5V0 and GND shunts to enable
GND
or break isolation boundary
Shunt
XDS110 Side
PWR & GND
Isolation Boundary
MCU Side
+5-V power can flow
from either the
XDS110 or MCU
sides
Figure 2-2. LaunchPad Power Distribution Diagram
Isola o n Boundary
¡
Figure 2-3. LaunchPad Power Plane Diagram
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Figure 2-2
+3V3_XDS110
3.3-V Power
Management
+3V3_XDS110
+5V0 +3V3
+5V0
Shunt 2 Shunt
JP2
+5V0_MCU +3V3_MCU
Shunts to disconnect +5 V
and/or +3.3 V between
XDS110 and MCU sides
3.3V & 5V Isola on
Boundary
C2000 F28P55x Series LaunchPad Development Kit
Hardware
and Figure 2-3.
+3.3-V power
only flows from
XDS110 to MCU
side
5-V & 3.3-V Isolation
+3V3
Boundary
5