SWRU629A September   2024  – February 2025

 

  1.   1
  2.   Description
  3.   Features
  4.   4
  5. 1Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Kit Contents
    3. 1.3 Specification
    4. 1.4 Device Information
  6. 2Hardware
    1. 2.1 Wired Connections, Jumper Settings, Buttons, and LEDs
      1. 2.1.1  SWD Interface
      2. 2.1.2  I2C Connections
        1. 2.1.2.1 Default I2C Addresses
      3. 2.1.3  UART Signals
      4. 2.1.4  SD Card Interface
      5. 2.1.5  External Memory Interface
      6. 2.1.6  ADC Interface
      7. 2.1.7  Reset Pullup Jumper
      8. 2.1.8  Push Buttons
      9. 2.1.9  LED Indicators
      10. 2.1.10 LaunchPad Header Pin Assignment
    2. 2.2 Power
      1. 2.2.1 VIO Selection
      2. 2.2.2 Measure the CC35xxE Current Draw
        1. 2.2.2.1 Low Current Measurement (LPDS)
        2. 2.2.2.2 Active Current Measurement
    3. 2.3 Clocking
    4. 2.4 Conducted RF Testing
    5. 2.5 Evaluation Setup
      1. 2.5.1 Wi-Fi Toolbox LP-EM-CC35X1 Hardware Setup
  7. 3Hardware Design Files
    1. 3.1 Schematics
    2. 3.2 PCB Layouts
    3. 3.3 Bill of Materials (BOM)
  8. 4Additional Information
    1. 4.1 Trademarks
  9. 5Revision History

2.1.10 LaunchPad Header Pin Assignment

The LP-EM-CC35X1 features 2 × 20-pin connectors that provide access to many of the CC35xxE pins and features. The LaunchPad header pinout is standard in TI, allowing easy stacking of other TI BoosterPacks on the LP-EM-CC35xx for quick interface with peripheral boards.

The CC35xxE LaunchPad follows this standard. For CC35xxE pin-mapping assignments and functions, see Figure 2-17.

LP-EM-CC35X1 CC35xxE LaunchPad Header Pin AssignmentsFigure 2-17 CC35xxE LaunchPad Header Pin Assignments

All the signals are referred to by the GPIOx in the SDK. The default mappings are shown in Figure 2-17. Some of the pins are repeated across the connector. For example, GPIO4 is available on header pin 25 and pin 39, but only pin 25 is connected by default. The signal on LaunchPad header pin 39 is marked with an asterisk (*) to signify that the signal is not connected by default. The signal can be routed to the pin by using a 0Ω resistor in the path.

Note: The LP-EM-CC35X1 has two jumpers, which can control the voltage of VIO1 and VIO2. The jumpers provide reference voltage for the various CC3551E IOs, and can be configured to 3.3V or 1.8V. When using the GPIOs connected to the LaunchPad header pins, knowing what VIO the jumpers correspond to, and how to configure them to be either 3.3V or 1.8V is important. For more information, refer to Section 2.2.1.