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
TI Confidential – NDA Restrictions
Operational Setup and Testing
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SWRU548A–February 2019
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CC3235MODSF LaunchPad™ Development Kit (LAUNCHCC3235MOD)
4.1 Measuring the CC3235MOD Current Draw
To measure the current draw of the CC3235MOD device using a multimeter, use the VBAT jumper on the
J101 isolation block. The current draw measured in this mode includes only the CC3235MOD device,
Serial Flash, any current drawn through the BoosterPack plug-in module headers. However, if a GPIO of
the CC3235MOD is driving a high current load like the LED, then that is also included in this
measurement.
4.1.1 Low-Current Measurement with USB Power ( <1 mA)
See the following instructions to measure ultra-low power when powering with a USB cable (see ).
1. Remove the VBAT jumper in the J101 isolation block, and attach an ammeter across this jumper.
2. Consider the effect that the backchannel UART and any circuitry attached to the CC3235MOD may
have on current draw. Consider disconnecting these at the siolation jumper block, or at least consider
their current sinking and sourcing capability in the final measurement.
3. Begin target execution and set the device to low-power modes (LPDS or hibernate).
4. Measure the current. Remember that if the current levels are fluctuating, it may be difficult to get a
stable measurement. It is easier to measure quiescent states.
4.1.2 Active Current Measurements
See the following instructions to measure active power.
1. Remove the VBAT jumper (J18).
2. Solder a 0.1-Ω resistor on a wire which can be connected to a voltmeter/oscilloscope. Or, attach a
jumper across J18 so that it can be used with a current probe.
3. Measure the voltage across the resistor using an oscilloscope with a differential probe. For the current
probe, coil the wire around the sensor several times for good sensitivity.
• An ammeter can also be used for this measurement, but the results may be erroneous due to the
switching nature of the current