SLAA457B September   2013  – October 2018 MSP430F5500 , MSP430F5501 , MSP430F5502 , MSP430F5503 , MSP430F5504 , MSP430F5505 , MSP430F5506 , MSP430F5507 , MSP430F5508 , MSP430F5509 , MSP430F5510 , MSP430F5513 , MSP430F5514 , MSP430F5515 , MSP430F5517 , MSP430F5519 , MSP430F5521 , MSP430F5522 , MSP430F5524 , MSP430F5525 , MSP430F5526 , MSP430F5527 , MSP430F5528 , MSP430F5529 , MSP430F5630 , MSP430F5631 , MSP430F5632 , MSP430F5633 , MSP430F5634 , MSP430F5635 , MSP430F5636 , MSP430F5637 , MSP430F5638 , MSP430F5658 , MSP430F5659 , MSP430F6630 , MSP430F6631 , MSP430F6632 , MSP430F6633 , MSP430F6634 , MSP430F6635 , MSP430F6636 , MSP430F6637 , MSP430F6638 , MSP430F6658 , MSP430F6659 , MSP430FG6425 , MSP430FG6426 , MSP430FG6625 , MSP430FG6626

 

  1.   Starting a USB Design Using MSP430™ MCUs
    1.     Trademarks
    2. 1 USB and the Art of Making Something Complex Look Simple
      1. 1.1 What Has Made USB So Successful?
      2. 1.2 But It Looks So Simple!
      3. 1.3 TI's Approach for MSP430 USB
    3. 2 MSP430 USB Silicon
      1. 2.1 How MSP430 Devices are Documented
      2. 2.2 USB-Equipped MSP430 Derivatives
      3. 2.3 MSP430 USB Module
      4. 2.4 USB Certification of the Silicon
    4. 3 Software
      1. 3.1 USB Developers Package: Overview
      2. 3.2 USB API Stacks: Features
      3. 3.3 MSP430 USB Descriptor Tool
      4. 3.4 Host Software, and the Java HID Demo App
      5. 3.5 USB API Programmer's Guide and Examples Guide
      6. 3.6 MSP430 USB Field Firmware Upgrade Tools
    5. 4 MSP430 USB Hardware Design
      1. 4.1 TI Reference Design for USB Interface
      2. 4.2 Selecting a Power Configuration
      3. 4.3 Selecting a Clock Configuration
        1. 4.3.1 Choosing a Source
        2. 4.3.2 Choosing a Frequency
      4. 4.4 Other Reference Design Commentary
    6. 5 MSP430 USB Software Design
      1. 5.1 How to Choose a USB Device Class
      2. 5.2 How to Select a Vendor ID (VID) and Product ID (PID)
        1. 5.2.1 What are the VID and PID?
        2. 5.2.2 How are They Chosen (or Obtained)?
        3. 5.2.3 Using VIDs and PIDs During Development
    7. 6 Getting Started: Evaluating MSP430 USB
      1. 6.1 Software Development Environments
      2. 6.2 F5529 LaunchPad Development Kit
      3. 6.3 MSP430F5529 USB Experimenter's Board
      4. 6.4 FET Target Boards
    8. 7 More Information
  2.   A USB Glossary
  3.   Revision History

4.3 Selecting a Clock Configuration

The MSP430 USB module internally uses a 48-MHz clock, which is generated from an integrated PLL. The PLL needs a precise reference clock, which comes from the XT2 oscillator.

msp430_usb_clock_connect_slaa457.gifFigure 10. MSP430 USB Clock Connections