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.

Why name change from Stellaris to Tiva?

Hello,

   I see on the TI home page that the Stellaris M4F line has been renamed to Tiva. Why the change of name? They're now called the "4C" series - I assume they still have the floating point M4F core, correct?

http://www.ti.com/lsds/ti/microcontroller/tiva_arm_cortex/c_series/tm4c_arm_cortex-m4/overview.page

BTW, I think I should get an award for being the first forum person to notice the name change :)

fixituntilitsbroken.blogspot.com

Latest Post: "BLE application development : Custom Hardware"

28 Replies

  • In reply to cb1_mobile:

    Good point - RTP = released to production

    Regards, ~Miguel

  • In reply to miguel2667:

    Thanks, this announcement was what I was looking for.

    http://e2e.ti.com/support/microcontrollers/tiva_arm/f/908/t/258794.aspx

    fixituntilitsbroken.blogspot.com

    Latest Post: "BLE application development : Custom Hardware"

  • In reply to Derek9531:

    hi all

    starting from what I have on my desk (and on my HDD)... maybe it is the something real....

    I have a EK-LM4F120XL red light PCB with 2 .... LX4F120H 5QRFIGA3... and it matched to what I read on web, everywhere on TI website.

    Let me just refresh my browser, let me check again marker on Stellaris Launchpad chips.... wow .... what's happens? My CHIP no more exist for TI?!?!?

    Fortunately some web pages are still there like wiki

    Let me cite it:

    The LaunchPad board features an 80MHz LM4F120H5QR microcontroller, on-board emulation and BoosterPack XL format expansion pins. The LM4F120H5QR microcontroller has 256KB of flash memory, 32KB of RAM, 2KB of EEPROM, two 12-bit analog to digital converters, a USB 2.0 device port, a hibernation module, other serial connectivity and flexible GPIO.

    IT talk about LM4F120H5QR (not LX4F as on my board). Let me search it on TI website --> TI search engine point to  http://www.ti.com/product/LM4f120H5qr but it is no more reachable. It is redirected to http://www.ti.com/product/TM4C1233H6PM.

    I spent some time (time is money) to read TI forum, I also read TI press news. Let me cite again:

    DALLAS, April 15, 2013  ...... announces its new Tiva ARM® MCU platform.  The first devices in the new platform – Tiva C Series TM4C123x ARM Cortex-M4 MCUs – are the...... lower power.  The Tiva C Series TM4C123x MCUs, formerly known as Stellaris® LM4F MCUs,...

    what? It means that TI just decide to rename chip on my Launchpad board? Stellaris family is now Tiva family? But family component are the same? Chip on my board that was in Stellaris family is now in Tiva family? Nothing more?

    ... are in production today ....

    I do not understand. TI rename Stellaris family in Tiva family and add some new chips to this family? But old ones should still be there?No?Yes?With same name?They disappear at all, they no more exist, deleted also from history of TI? No more documentation? No more support? No more production? Is my LM4F120H5QR in Tiva family?yes with another name? no it remain in Stellaris family?What?

    ... The $12.99 USD EK-TM4C123GXL  Tiva ARM C Series LaunchPad is available for purchase now.

    I pay just $ 5 USD for my "was Stellaris" is Tiva Launchpad, just few month ago.

    Ok. Stop to struggle: I read http://www.ti.com/lit/an/spma035d/spma035d.pdf and http://www.ti.com/lit/an/spma049/spma049.pdf

    But both of them talk about transition from LM3S series, that was a Stellaris family component, but not LX4F/LM4F on my desk. Is this document applicable?

    Ok, I need datasheet for what I have on my desk.... it was at : http://www.ti.com/lit/ds/spms294c/spms294c.pdf  <--- THE LINK IS BROKEN!!! [as symlink : http://www.ti.com/lit/ds/symlink/lm4f230e5qr.pdf]

    Ok, no problem, TI redirect me to http://www.ti.com/product/TM4C1233H6PM. Let me trust of it. Let me take Tiva™ C Series TM4C1233H6PM Microcontroller Data Sheet --> ok on this document title there's :

    (identical to LM4F120H5QR)

    Means that chip on my desk, is now called TM4C1233H6PM. If I buy a TM4C1233H6PM, TI will send to me a chip marked with TM4C1233H6PM but that is 100% like LM4F120H5QR? Can I solder it to my Stellaris Launchpad? And flash it with same bin?

    And what is on new Tiva Launchpad (and cost $ 12.99 USD) is TM4C123G, something different from  TM4C1233H6PM. "G" instead of  "3H" make the difference?

    15 April announce talks about TM4C123x, which ones of them ?

    ...a lot of question I know.... let us know

    EDITED : KEIL still have LM4F datasheet . From comparison of them, I just recall to myself that LM4F120H5QR == TM4C1233H6PM

    BR

    Mik

  • In reply to Michele Pagot:

    Mik,

    I'll try to address the technical side of this.

    The LM4F120 is identical to the TM4C1233H6PM in terms of pins and features, form and function.  You can solder the TM4C onto the launchpad you can load it with the same binary.  The TM4C is a later revision of silicon several of the errata have been resolved. It is the same design and same chip. Likewise you can take TivaWare code and run it on the LM4F120 devices.

    The Tiva LaunchPad added USB OTG and USB Host functions as well as QEI and Motion (advanced) PWMs. That is the reason for change to the TM4C123G.  The TM4C123GH6PM is identical to the LM4F230H5.  TivaWare does not yet take advantage of the new features so all TivaWare examples run on the Stellaris LaunchPad.

    The confusion regarding the X in the silicon part number on the chip is because prior to full production release and qualification we mark the silicon with an X.  The first few Tiva launchpads may have the XM4C marking.  However, very quickly we will switch to TM4C parts.  All Tiva parts are currently the same silicon revision   (B1) the XM4C's were just early builds of the same device and revision.  All Stellaris M4F parts will have the X.  For most LaunchPad users the X is just there for TI's logistics and tracking purposes and has no effect.

    The Tiva announcement means that the parts on LaunchPad are now available to order from distributors including those that specialize in low volume.  Lead times are long at the moment but that will get better as we continue to ramp.

    Dexter

  • In reply to Stellaris Dexter:

    Thanks, Dexter. You covered the meat of the issue, I think.

    I will add that the difference between the TM4C123G and the TM4C1233 is in feature capabilities. The 'G' variant supports USB OTG/H/D as well as motion control. The '3' variant support USB Device Only and does not include the motion control PWM peripheral.

    In other words, we put the superset family member on the LaunchPad, but as long as you do not use USB OTG, Host, or motion control PWM peripherals your code will be fully applicable to the TM4C1233.

    Regards, ~Miguel

  • In reply to Stellaris Dexter:

    thank Dexter... quite clear replay. Thanks. Let me proceed to explore TI Cortex world on my Launchpad.

    BR

    Mik

  • In reply to SourceTwo:

    HI, 

    I am a consultant in ARM microchips. Giving advice to  use Stellaris Cortex-M3 after TI bougth this company was a mistake that did cost me a lot of my reputation. Some guy from ST told me a rumor FLASH memory in Stellaris chips had been able to rewrite  200 times only so it was a reason to stop STM32F3 production. The businnes politics of the TI from the time when it bought Stellaris company till today  is incredible bad - the TI is - at least for me - untrustful, so no recomendation for TI core M4 any more.  

    It's very easy to loose a brand name -  all my clients love producers guarrantee production of chips for at least 10 years like Microchip or Freescale because expenses for a new development without added values because of stopped production of microchips are enerrmous.   

    Regards  Igor

  • In reply to Igor Pokorny:

    Igor Pokorny

    It's very easy to loose a brand name -  all my clients love producers guarrantee production of chips for at least 10 years like Microchip or Freescale because expenses for a new development without added values because of stopped production of microchips are enerrmous.   

     I Igor, I think you are right, the best IMHO was to announce LM3S experience bad issues and no effort to correct so production stop when LM4S substitute appear on market...

     TI suddenly stopped and this appear as worst, also no direct path from LM3S to LM4S exist so also all development kit we bought are useless too :(

     Time money and investment as you say sound bad, other company use different fading policy providing clear support for what in production, we know little about TI and internal policy but everyone here think the move of cancelling a series is BAD!!

     TI is acting buying some company with silicon that compete her product, (again IMHO) stellaris was a very bad move and silicon revealed too many issues, so a clean announcement of NRND and slow fading of production and support ...

     IHMO... fading out some useless series but leave all devices cannot have a drop in..

     LM4S need (at almost for some time) be direct replacement of LM3S

      ... About Microchip I abandoned in favour of TI when I experienced not less trouble than Stellaris.... USB chip I choosed announced NEVER come to market and disappeared soon, price, support, not at least poor performance at eq prices, evasive answer from support, silly answer like you powered in or have you an xtal connected...

     Freescale sometimes allocates production and you are out of business for some LONG time...

     TI Ethernet PHY part have no substitute from NONE company.. (IMHO and not only) This is the worst error of TI, leave in production till ready, announce slow obsolescence due to worst silicon issues... Long term can be redesigned, direct replacement can also save all hardware designed till now... We know too less again and too less why TI hide behind NDA licence...

     I am evaluating LM4S .. Again launchpad and samples have lead time of 11 12 week :(((((

     Regards

     Roberto


     Please login & click    Verify Answer    if this post answered your question.

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.