SWRU637 March   2025

 

  1.   1
  2.   Description
  3.   Get Started
  4.   Features
  5.   Applications
  6.   6
  7. 1Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Kit Contents
    3. 1.3 Specification
    4. 1.4 Device Information
  8. 2Hardware
    1. 2.1 Power Requirements
    2. 2.2 Temperature Range
    3. 2.3 Energy Trace
    4. 2.4 Hardware and Debug Setup
      1. 2.4.1 Using a LaunchPad XDS110 Debug Probe
      2. 2.4.2 Using a Generic XDS110 Debug Probe, Including a Separate LaunchPad
    5. 2.5 BoosterPack Connector Pinout
    6. 2.6 XDS110 Interface Connector
    7. 2.7 Debug Interface Connector
    8. 2.8 Jumper Information
    9. 2.9 Push Buttons
  9. 3Advanced use of the LaunchPad Hardware
    1. 3.1 External Antenna
    2. 3.2 XDS110 GPIOs
    3. 3.3 Reset Selection on BoosterPack Connector
    4. 3.4 I2C Pullup Resistors
  10. 4Software
    1. 4.1 Getting Started
    2. 4.2 Out of Box Demo
  11. 5Hardware Design Files
    1. 5.1 Reference Schematics
    2. 5.2 PCB Layouts
    3. 5.3 Bill of Materials (BOM)
  12. 6Compliance Information
    1. 6.1 CE Compliance
    2. 6.2 REACH Compliance
    3. 6.3 Waste Electrical and Electronic Equipment (WEEE) Compliance
  13. 7Additional Information
    1. 7.1 Trademarks
  14. 8References

3.4 I2C Pullup Resistors

The LP-EM-CC2340R53 supports the I2C port of the CC2340R5 device: pins DIO0 (SDA) and DIO24 (SCL). To use I2C, however, pullup resistors are required and can be added to the footprints designated by R66 and R67 on the LP-EM-CC2340R53 board. The correct value for these resistors varies according to the bus length and other intrinsic characteristics. To properly do this calculation, consult the application note Understanding the I2C Bus.

LP-EM-CC2340R53