• State Resolved
  • Locked Locked
  • Replies 3 replies
  • Subscribers 78 subscribers
  • Views 1867 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

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.

MSP430 PMBus Device Support

Akash Patel
Expert 6245 points
Other Parts Discussed in Thread: TPS53679, MSP430F5308

Hi team,

We are looking to use the MSP430 in a PMBus application with the TPS53679. From the PMBus Library's User Guide, it says that we have support for the MSP430G2xx3 and MSP430FR5xx_6xx devices and I see that for these families we have examples in our resource explorer. Are these the only families that we can use with this library? 

We are interested in having a devices with 2 I2C ports and looking at potentially using the MSP430F5308. Are there any considerations we would have to take when looking at this device or other devices?

If need be, can we use the PMBus library with the software I2C ports as well?

Regards,

Akash Patel

  • 0
    TI__Guru**** 202256 points

    Hi Akash,

    From Section 5.1 of the User's Guide: "The code examples and PMBus library can be implemented in different derivatives of the same family with little effort, and they can be migrated to other MSP430™ devices with the same I2C interface with some considerations such as pin usage, memory and timeout-timer availability."

    There is also SLAA386 for reference: www.ti.com/.../slaa386a.pdf

    So my suggestion is to take the MSP430G2xx3 USCI PMBus example and port it to the MSP430F5308. There are no additional considerations required so long as you have the available I2C bus and alert/control pins, I imagine a bit-bang I2C solution is possible as well but the additional communication layer has not been developed in the PMBus library and should be avoided in favor of using a (e)USCI module.

    Regards,
    Ryan

  • 0 in reply to Ryan Brown1
    TI__Expert 6245 points

    Hi Ryan,

    I just wanted to point out a bug that we found in our use of the PMBus Library. If you could pass that over to the appropriate team, that would be helpful.

    In the pmbus.c file, line 45 reads:

    #define PMB_BLOCK_READ                              0x40

    This should actually be:

    #define PMB_BLOCK_READ                              0x04

    Regards,

    Akash Patel

  • 0 in reply to Akash Patel
    TI__Guru**** 202256 points
    Hi Akash,

    Thank you for bringing this to our attention, I have submitted a bug request so that this issue is investigated and addressed.

    Regards,
    Ryan

**Attention** This is a public forum