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available or not available is the question and what can I create without?

jan2809
Mastermind 7850 points


Hi,

I am after LM4F230H5QR to replace the part on Stellaris Launchpad (no PWM, no QEI) for a more useful to me set of peripherals (PWM, QEI)

(BTW, I do not need 8 UARTs)

According to info here http://www.ti.com/product/LM4F230H5QR 

"Pre-production superset device LX4F230H5QRFIGA3 samples available now. The "X" indicates that the device is experimental silicon."

However the link says "Not Available"

What can I create? Nothing, as there a no chips, only marketing noise.

Jan

Jan

  • 0
    Guru 117855 points

    Feel your pain - believe there may well be - short-term solution.  (recall some of your past posts - believe you to be smart/resourceful...)

    Suggest that you involve local TI Sales/Mkt and or TI FAE.  Make the best, "Business Case" that you can for your request - this often will yield sample devices quickly.  Any, "past history" of vendor purchases helps greatly.  Realize - parts are new - demand is high - you have to, "Sell" your need and its benefit to vendor!  Such method is not just belief/theory - has worked quite well for our firm...

    You may also be able to employ the far more expensive M4 Eval board - at least as, "Proof of Concept."   Demonstrating such success will support your case - as described above.

    Calling marketing's spawn, "Noise" - perhaps unfair to noise!   Dumbed-down - Content-FREE - certainly gets my "creative" juices flowing...

    Hopefully a better Ad...  (we all have excess time to endlessly chase multiple, intermittent, other links for "hoped for" Normal/Customary - Basic Data...)

  • 0
    TI__Expert 8270 points

    Hello Jan,

    TI and our distribution partners do not stock parts if they are "preproduction" silicon. This is why the link says "Not Available".

    I could get you 5 pcs of the LX4F230H5QRFIGA3. Just PM me with the address you would like them sent to.

    Thanks for your patience - but now you will have no excuses for not creating anything.. I expect to see a cool demo!

    Alex

  • 0 in reply to TI Alex
    Guru 117855 points

    @Alex-

    Great kindness by you - surely poster will appreciate.  That said - might this, "Open the Flood-Gates"?  And - is not establishing some/better relationship w/local TI Staff more, "normal/customary" operating procedure?

    Suspect some validity resides in response just preceding yours...  (although tad "light" on sample parts...)

  • 0 in reply to TI Alex
    Mastermind 7850 points

    Hi Alex,

     Thanks for your answer and a generous offer. Much appreciate it.

    Can you confirm that the parts LM4F120H5QR and LM4F230H5QR are pin compatible?

    My intension is to replaced the original micro on Stellaris Launchpad (waiting for them to arrive) with the one with motion control peripherals.

    I apologize for using strong words in my original post. It was a moment of frustration, after checking Mouser's site and discovering their lead time and MOQ.

    My project is a motor controller based on Stellaris Launchpad for a simple robot.

    As I work for university now, there is no strong business case, however we use a number of TI's products in our labs and for students projects.

    Thanks again

    Jan

  • 0 in reply to jan2809
    TI__Expert 8270 points

    Hello Jan,

    Yes, they are pin compatible. Make sure you post a video of your robot once you are done.

    Thanks for using Texas Instruments.

  • 0 in reply to TI Alex
    TI__Genius 12770 points

    Jan,

    One quick graphical method to check pin compatibilty between Stellaris ARM Cortex-M4 Microcontroller's is to use the Stellaris PinMux Utility.

    Stellaris PinMux Utility: http://www.ti.com/tool/lm4f_pinmux 

    You can open two instances of this GUI and compare pin for pin as well as ensure that the device you intend to use has the correct number of interfaces available on separate pins.

    This GUI only supports Cortex-M4 devices not Cortex-M3.

  • 0 in reply to TI Alex
    Expert 2415 points

    Hello,

    I'm currently constructing a linear motion demonstration platform as a senior year mechatronics project at my university. I managed to grab one of the Stellaris LaunchPads and am now well underway familiarizing myself with the platform. My aims are really high; I want to implement current-controlled, smooth-acceleration stepper control, as well as read the motor axis, ball screw (after a gearbox), and finally the linear slide positions, all with quadrature encoders. The rotating quadrature encoders have 1000 ppr, which equates to around a 333 kHz pulse train when running at 5000 rpm. The linear slide will create a 167 kHz pulse train at that speed. That makes me wonder, processing all those interrupts is really starting to eat away available processor time.

    That brings me to think how nice it would be to be able to offload both of the rotating encoders to the hardware QEI modules, only I don't have them on the LaunchPad ;) The project would also benefit from the dedicated PWM modules available on the LM4F230. So, would it be possible for me too to get samples of the LM4F230H5QR?

    I believe you have a presence here in Espoo, Finland, so I can check with them if you'd like me to confirm the authenticity of my project.

    Thanks,

    Veikko

  • 0 in reply to Veikko Immonen
    TI__Genius 10040 points

    Yes, it would be best to start with the local TI team for your inquiry.

    --Bobby