This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

  • TI Thinks Resolved

MSP430FR2522: slave i2c sw simultion on GPIO

Intellectual 1170 points
Terry Deng

Replies: 3

Views: 96

Part Number: MSP430FR2522

customer need slave i2c on fr2522 to communicate with host mcu，but the hardware i2c pin is occupied by captive function，do we have reference code to simulte sw slave i2c on general gpio？

Intellectual 1170 points
Terry Deng
  • Expert 4775 points
    Yiding Luo
    Hello Terry,

    They can remap the I2C function to other pins on the MSP430FR2522 20 pin RHL package.
    The primary eUSCI_B0 I2C pins are Pin 19 and Pin 20 which are also shared with CAP IOs. The secondary eUSCI_B0 I2C pins are Pin 9 and Pin 10 which are not shared with CAP IOs.

    Thanks,
    Yiding

  • Intellectual 1170 points
    Terry Deng

    In reply to Yiding Luo:

    hi yiding，thanks your advice. customer cannot accept 20pin QFN package，so we have to consider sw i2c on 16pin package
  • Expert 4775 points
    Yiding Luo

    In reply to Terry Deng:

    Hello Terry,

    Here is the app note on MSP430 SW I2C.
    www.ti.com/lit/slaa703
    This software solution supports transactions on I2C bus with an SCL clock frequency of up to 100 kHz for master and slave.
    I would still recommend to use 20pin QFN package if possible.

    Thanks,
    Yiding

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.


All content and materials on this site are provided "as is". TI and its respective suppliers and providers of content make no representations about the suitability of these materials for any purpose and disclaim all warranties and conditions with regard to these materials, including but not limited to all implied warranties and conditions of merchantability, fitness for a particular purpose, title and non-infringement of any third party intellectual property right. No license, either express or implied, by estoppel or otherwise, is granted by TI. Use of the information on this site may require a license from a third party, or a license from TI.

Content on this site may contain or be subject to specific guidelines or limitations on use. All postings and use of the content on this site are subject to the Terms of use of the site; third parties using this content agree to abide by any limitations or guidelines and to comply with the Terms of use of this site. TI, its suppliers and providers of content reserve the right to make corrections, deletions, modifications, enhancements, improvements and other changes to the content and materials, its products, programs and services at any time or to move or discontinue any content, products, programs, or services without notice.

TI worldwide | Contact us | myTI login | Corporate citizenship

TI is a global semiconductor design and manufacturing company. Innovate with 100,000+ analog ICs and
embedded processors, along with software, tools and the industry’s largest sales/support staff.

© Copyright 1995-2019 Texas Instruments Incorporated. All rights reserved.
Trademarks | Privacy policy | Terms of Use