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High reliability microcontroller

Murugavel swaminathan
Prodigy 50 points
Other Parts Discussed in Thread: MSP430FR2433, MSP430FR2633

Hi,

    We are medical equipment manufacturer and designed product in medical field .We are comparing MSP430 series micro-controller with some other manufacturer's micro-controller to our one of the design.

We have some queries on that

1. Our requirement is ultra low power microcontroller. So we have compared MSP430FR2633,MSP430FR2433,MSP430FR2633 with STM32L431CBY6TR,STM32L011D3Px

2.What are the main advantages of FRAM over FLASH?

3.Our another requirement is High reliability.So can you suggest any high reliable microcontroller with MSP430R Spec

Thanks,

Murugavel.S

   

  • 0
    Guru 34773 points

    Murugavel swaminathan said:

    2.What are the main advantages of FRAM over FLASH?

    Main FRAM advantage is writing (like in RAM) without erasing. You can read about this (with my comment) here...

    https://e2e.ti.com/blogs_/b/msp430blog/archive/2017/06/22/fram-or-flash-how-to-select-the-right-mcu-for-your-application

    However, executing from flash is faster (same speed as executing from RAM), while running CPU on higher frequencies from FRAM need wait states.

  • 0 in reply to zrno soli
    TI__Guru* 79821 points

    Hi Murugavel,

    What particular high reliability requirements do you have - high temp range? Radiation tolerance? something else? You can find TI devices classified as high reliability using the hi-rel quick search tool here: www.ti.com/.../overview.html

    You can also find more information on FRAM here: http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=5488738 ,  www.ti.com/.../slaa526 and other advantages: www.ti.com/lit/pdf/slat151
     
    Regards,
    Katie

  • 0
    Prodigy 50 points

    Hi ,

        I found in E2E forum queries and their answers regarding to FRAM. I have few concerns on FRAM.

    1. Reliability of FRAM.(Few users have experience of Memory Loss in FRAM and their data might corrupt in High Junction Temperature)

    2. I want comparison result of FRAM vs Flash with following parameters

    i) Data Protection

    ii)Endurance

    iii)Effect of EM waves 

    iv)Reliability

    v)Read ,write speed

    Thanks,

    Murugavel.S

  • 0
    Guru 34773 points

    Murugavel swaminathan said:

    i) Data Protection

    There is JTAG fuse location in memory, where JTAG access can be broken forever or enabled only by password. In general, it is more or less the same on flash 5xx/6xx and FRAM family. However, FRAM is newer family, and TI implemented some things, not existing in flash family. For example, (some of) bricked FRAM device (with locked JTAG access) can be bring back to factory state, executing mass erase by mailbox / boot code.

    Murugavel swaminathan said:

    v)Read ,write speed

    If we are talking about average programmer, FRAM is advanced because it doesn't require pre-erase before write, write / read is identical to RAM. But 5xx/6xx flash family has fast writing speed, and with smart bit enabled (not covered by TI datasheet), block write executed from RAM can go over 250 KByte/s. All comparison for write / read, MSP430 flash vs FRAM, made by TI, are strictly commercial nature.

    BTW, there is no FRAM device with USB module, and there are wait states (code must be copied to RAM for full speed execution).

        

  • 0 in reply to Murugavel swaminathan
    TI__Guru* 79821 points
    Hi Murugavel,

    I merged the threads since it seemed you still had some questions about the same topic. Hopefully these links will be helpful:

    1) Data protection: please see the app note MSP Code Protection Features, including specifically JTAG lock, MPU, and IP Encapsulation: www.ti.com/.../slaa685

    2)Endurance: from our datasheet endurance spec is >10^15 read and write cycles (most flash is only 10000 write cycles) www.ti.com/.../msp430fr5969

    3)Effect of EM waves: www.ti.com/.../slat151 addresses this. FRAM is not affected by magnetic fields, and there is also a statement about withstanding electric fields and radiation on page 2. However do note that even though FRAM itself has radiation resistant characteristics, there is still CMOS logic in the device that could be impacted (that is also true of flash devices). If that becomes a concern you may need to engage with the hirel team www.ti.com/.../overview.html

    4) FRAM reliability: ieeexplore.ieee.org/.../stamp.jsp and www.ti.com/.../slaa526

    5)Read, write speed: from our datasheet both are max 8MHz. www.ti.com/.../msp430fr5969 For CPU speeds above 8MHz, a caching mechanism is used to help mitigate the need for wait-states to achieve faster than 8MHz code execution.

    Regards,
    Katie

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