SWRU629 September   2024

 

  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 Pull-up 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

2.2.2.1 Low Current Measurement (LPDS)

To measure the current draw of the CC35xxE device for both power supplies (3.3V or 1.8V), a jumper labeled J17 (for 3.3V supply) and a jumper labeled J16 (for 1.8V supply) is provided on the board. By removing J16, users can place an ammeter into this path to observe the current on the 1.8V supply. The same process can be used for observing the current on the 3.3V supply with J17. TI recommends this method for measuring the LPDS.

Note: The current measured on the 3.3V and 1.8V jumpers is the total current that goes to the CC35xxE, not including VIO1, VIO2, and VDDSF. These supplies provide reference voltage for all of the IOs and to some of the peripherals on the LP-EM-CC35X1 (ADC buffers, sensors, and so forth.).
LP-EM-CC35X1 Low Current Measurement Figure 2-22 Low Current Measurement