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Final cloack frequency

Other Parts Discussed in Thread: MSP430F5333

Hi,

 

I see that there is a bit of confusion regarding MSP430F5333  clk frequency.

In same documents it is specified at 20Mhz in other at 25Mhz what will be the real frequency?

 

Thank you

 

Alessandro Fulignani

  • Hi Alessandro,

    The F5333 max MCLK frequency is 20MHz. I did a full search of the datasheet and only saw it listed as 20MHz. Where did you see it listed as 25MHz?

    If you saw 25MHz in the 5xx/6xx user's guide, this is because there are some 5xx parts like the F5438A or the F5529 that can run at 25MHz. For specific part operational specs always see the datasheet as the user's guide covers the entire family.

    Regards,

    Katie

  • Hi,

     

    Thank you for your fast answer.

     

    Here the links where you can read the 25Mhz spec:

     

    http://focus.ti.com/paramsearch/docs/parametricsearch.tsp?familyId=1615&sectionId=95&tabId=2229&family=mcu

    http://www.ti.com/product/msp430f5333?qgpn=msp430f5333

     

    As you can see on the main page of the 5XX familiy they are all at 25Mhz with the exclusion of the 66xx

     

    regards,

    Alex

     

     

  • Hi Alessandro,

    Thanks for pointing out this discrepancy. In this instance I'm pretty confident that the website is wrong and the datasheet (20MHz) is correct, but I am double-checking to confirm this and will let you know what I find. Either way, I'm going to take some actions to get this fixed on our website, so thanks for pointing it out!

    UPDATE: I've confirmed, the datasheet is correct as I suspected - 20MHz is the max MCLK spec for this and all other F533x parts. This is going to be fixed on the website parametric search and product page.

    Regards,

    Katie

  • Katie,
    it seems that a lot of the parametric search database entries have been copied and pasted for a whole group of MSPs and only the flash/ram size has been altered. So do some devices list an ADC where there is only a comparator (but a different MSP from the same datasheet does indeed have an ADC) and much more.
    Someone should completely rebuild the database, as this is by far not the only error in it. And if even newcomers detect the bugs, then it might be less useful than it could.

  • Hi Jens-Michael,

    Thanks for the feedback. I agree that it is bad when our customers are finding errors in the search tool as it's going to make it harder for people find and choose the correct part for their needs. We are currently working on a longer term solution to help prevent these copy-paste errors or typos from happening when new parts are put in the database, and I think this will include going back to update the entries for all of our existing devices - this may be a while though, as there are a lot of devices. In the short term, however, if you have found any of these errors you mention above for specific devices or device families if you could please let me know I will make sure they get fixed quickly.

    Regards,

    Katie

  • Katie, I just glanced over the 54xx parts. The non-A are not listed at all. Also there is no filter for the 5x family 18MHz parts. It seems that teh 54xx non-A have been completely forgotten.

    The watchdog/watchdog timer columns are ambiguous. What's the difference? Why do the G chips (and only 35 of the 50 G parts) have a watchdog timer and a watchdog, while all others only have a watchdog?
    Wouldn't be the size of the watchdog counter register of interest too? (15/31 bit)

    None of the G parts has an USCI listed, but some of them have one.

    Lots of the G parts have no flash size nor clock speed entry.

    Looking at the 54xxA parts, half of them are listed with 113BGA package, the other thee with 80LQFP. The 100LQFP are not listed.

    The BT5190 has no GPIOs (should have 87)

    The 1611 has only a 'yes' in the USART column. It has two USARTs. The number of USARTs would be better than a simple 'yes' in this column.

    The DAC of the 1611 is not listed (nor is it on the others of its sub-family)

    That's just what I noticed after a quick look on the chips I know best.

    p.s.: it would be nice to have the column with the device name sticky on the left just as the top row with the column titles is sticky on top. Also, people are sometimes curious about the number of crystals (HF/LF/total) could be of interest too. Especially on the G parts this might be important to know.

  • Hi Jens-Michael,

    Thanks as always for all of the feedback and suggestions. I have a feeling that the reason the F54xx non-A parts are not listed (also no 18MHz filter) is because these 54xx non-A parts are currently listed with a status of NRND (not recommended for new designs) - so we don't want to suggest them in the product selector. There will be changes made online regarding the rest of your suggestions though, especially the missing info. Thanks for helping us to make the product selection tool better. Feel free to post here or PM me if you notice any more issues on the site.

    Regards,

    Katie

  • Katie Enderle said:
    these 54xx non-A parts are currently listed with a status of NRND

    Yes. That's liekly the reason. And I agree that a product selector is mostply for people who search for a part for new designs. But for comparison or fuinding replacement parts, even discontinued products should be listed (even more, active but not recommended for new design products). There is already a column with 'active' selection. So some new selectors can be easily added there.

    Personally, I don't knwo why the non-A shouldn't be used. The A parts are no 100% replacements (full backwards compatibility was messed-up at several places) and are more expensive too. And the previous silicon revision did have the nasty flash cache bug so it was not usable for applications using LPMs at all. (this has been fixed now).
    There are no real drawbacks with the non-A so why not using them (especially for the lower price - every cent counts!). There are many more devices which are in the list and should be considered deprecated way more. Especially large sections of the 1x family.

    I don't think I'll find more mistakes in the selector soon, as I usually do not use it at all. Over time, I have accumulated most datasheets 8even if I never used the devices) and I look there when I want to confirm something.

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