User's Guide
Table Of Contents
- CC3235MODSF SimpleLink™ Wi-Fi® and IoT Solution With MCU LaunchPad™ Hardware
- Table of Contents
- 1 Introduction
- 2 Hardware
- 2.1 Block Diagram
- 2.2 Hardware Features
- 2.2.1 Key Benefits
- 2.2.2 XDS110-Based Onboard Debug Probe
- 2.2.3 Debug Probe Connection: Isolation Jumper Block
- 2.2.4 Application (or "Backchannel") UART
- 2.2.5 JTAG Headers
- 2.2.6 Using the XDS110 Debug Probe with a Different Target
- 2.2.7 Power Connections
- 2.2.8 Reset Pullup Jumper
- 2.2.9 Clocking
- 2.2.10 I2C Connection
- 2.2.11 Sense on Power (SOP)
- 2.2.12 Push-Buttons and LED Indicators
- 2.3 Electrical Characteristics
- 2.4 Antenna Characteristics
- 2.5 BoosterPack™ Header Pin Assignment
- 3 Layout Guidelines
- 4 Operational Setup and Testing
- 5 Development Environment Requirements
- 6 Additional Resources
- 7 Assembly Drawing and Schematics
- Revision History
- Important Notice
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Hardware
23
SWRU548A–February 2019
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CC3235MODSF LaunchPad™ Development Kit (LAUNCHCC3235MOD)
2.2.7.2 BoosterPack Plug-in Module and External Power Supply
Headers J19 and J20 are present on the board to supply external power directly when USB power is not
available. Use the following precautions before using the board with an external power supply.
1. Remove the USB cable.
2. Ensure that jumpers are only placed on the headers shown in Figure 12.
3. Use a jumper wire to connect VBAT and BRD.
4. Plug in the external power supply on J20 with the correct polarity.
Figure 12. Powering the CC3235MODSF LP from an External Power Supply
The OPAMP EN and LED EN jumpers are also available to remove any current draw from the onboard
OpAmp and LEDs being driven by the GPIOs, see Table 2.
Table 2. External Supply Connections and Enable Jumpers
Reference Use Comments
J19 5-V power input Used to power the board from an external 5-V supply
J20 3.3-V power input Used to power the board from an external 3.3-V supply.
J21 OPAMP EN If uninstalled, the power supply to the operational amplifier is cut off. This can
be used to enable low-power measurements.