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TM4C1294KCPDT: Can we get an update to the TM4C Microcontrollers Product Selector (SPMT285E)?

Brian Willoughby
Genius 4630 points
Part Number: TM4C1294KCPDT

I recently needed to look for alternative packages and peripheral configurations in the TM4C family, and found the format of the TM4C Product Selector to be quite helpful. That document, SPMT285D, is from 2014, and is missing quite a few of the new additions to the family that have been made in the four years since. It seems like it wouldn't be that much trouble for Texas Instruments to revisit that PDF and update it once a year, at least when there are new parts.

I realize that the TI.com web site has an interactive Product Selector, and I also find that useful. However, the printed format really allowed me to look across a broad range very quickly. Except for the fact that some processors were missing, I actually found the PDF version more useful in this case.

If there is another venue besides the E2E Forum where I should be making this request, then please point me in the right direction and I will follow through.

Brian

p.s. I would really like to see a TM4C129x part in the 64 LQFP package. As it stands now, it looks like I would have to give up 120 MHz operations and settle for an 80 MHz TM4C123x part if I want that package. I have some designs that need to fit in a small space, but the 212 BGA is not really appropriate. I went to the trouble of figuring out that I could fit all of my GPIO needs into the 64 LQFP, but I'm not done with the firmware development yet, so I can't be sure that 80 MHz would be fast enough. Actually, now that I write this, I'd be happy with a TM4C123x part in 64 LQFP that can run 120 MHz.

  • 0
    TI__Guru*** 135355 points
    Hello Brian,

    Thank you for that feedback, as I have been solely using the Parametric Selection tool on TI.com I at least was not aware that the document you highlighted was out-of-date. I will add this as an action for documentation improvements. And this is a fine venue to bring up such comments. I think for some if not all documents there is also a document feedback option as well, so that's another option, but E2E is a good way since that way it guarantees Charles/Bob/I see it immediately!

    Regarding the package request, always welcome feedback on that as well, though given the number of features offered with TM4C129x I am not sure it would ever be feasible to condense it into a 64-pin package.
  • 0 in reply to Ralph Jacobi
    Genius 4630 points

    Ralph Jacobi said:
    Regarding the package request, always welcome feedback on that as well, though given the number of features offered with TM4C129x I am not sure it would ever be feasible to condense it into a 64-pin package.

    Before I realized the speed limitations, I went to the trouble of looking at all of the GPIO pins and peripherals that I am using with my current hardware design, and managed to fit everything. There wasn't a pin to spare, but it would work. I'm using 4 UART (5 pins), 1 USB (4 pins), 2 QEI (4 pins), 1 SSI (4 pins), 2 GPI, 19 GPO, and JTAG (4 pins). Clearly, I wouldn't be able to use Ethernet.

    In light of everything, it makes more sense for me to ask that the TM4C123x get a speed boost to 120 MHz or more - just maintain the existing peripherals that the TM4C123x variations already have.

    p.s. Please let me know when a new Product Selector document is available!

  • 0 in reply to Brian Willoughby
    TI__Guru*** 135355 points
    Hi Brian,

    Our documentation update activities are scheduled to begin later this year and I am not sure yet what priority we will give the product selector document. If after review we find that the changes are minor, we may push it out quickly so get it checked off, but otherwise it may be queued behind other important updates we already identified via feedback on E2E. Of course if more comments arise about the product selector document, then we will re-evaluate based on that.