• State TI Thinks Resolved
  • Locked Locked
  • Replies 4 replies
  • Answers 1 answer
  • Subscribers 30 subscribers
  • Views 397 views
  • Users 0 members are here
Support feedback
Options
Options
Related

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.

looking for suggestion of MCU

Ki Long
Prodigy 20 points

Hi there,

  I am new to MCU development. I have very limited experience in using Intel 8051 long time ago and I didn't use any kind of MCU. I did a research online and finally get to know some basic ideas on the progress on MCU. Someone suggests me to look at the launchpad here and might help my project design. I am looking for something supported real-time clock with frequency up to 60MHz, multiple TTL-digital lines output (and input if available), and more importantly 12-bit analog output (it will be great if there is analog input also). And I need USB interface for program writing from the PC.

In the page http://www.ti.com/ww/en/launchpad/hercules.html, I saw the spec of the model LAUNCHXL-RM42 seems supporting the 12bit ADC (but that's analog output only), and seems there is not analog output implemented. Any suggestion for what model of launchpad meet my requirement? Thanks in advance.

  • 0
    TI__Guru 59540 points

    Hello Ki,

    Based on your description, I believe you are looking for a device with a DAC which would provide the analog output you are needing. The Hercules line of MCUs do not support analog/DAC outputs as we only have ADC's (analog to digital inputs) implemented on the Hercules devices. If you do not need ISO61508 levels of safety, I would suggest you investigate one of the other lines of MCUs offered by TI such as Tiva, MSP430, or C2000. I am fairly certain that the MSP430 and C2000 lines offer solutions with analog outputs so these might fit your needs. Other options would be to implement teh DACs outside of the MCU in which case the Hercules MCUs might work for you.

  • 0 in reply to Chuck Davenport
    Prodigy 20 points

    Chuck Davenport said:

    Hello Ki,

    Based on your description, I believe you are looking for a device with a DAC which would provide the analog output you are needing. The Hercules line of MCUs do not support analog/DAC outputs as we only have ADC's (analog to digital inputs) implemented on the Hercules devices. If you do not need ISO61508 levels of safety, I would suggest you investigate one of the other lines of MCUs offered by TI such as Tiva, MSP430, or C2000. I am fairly certain that the MSP430 and C2000 lines offer solutions with analog outputs so these might fit your needs. Other options would be to implement teh DACs outside of the MCU in which case the Hercules MCUs might work for you.

    Thanks a lot for your reply. May I ask what is ISO61509 level of safety, what is that for? Sorry that I don't have much experience on that :)

  • 0 in reply to Ki Long
    TI__Guru 59540 points

    Hello Ki,

    Without going into a lot of detail since you can do a web search and learn a lot more, ISO61508 is an international standard for component level functioinal safety used across many industries for safety critical systems. The standard defines different levels of safety such as SIL1 (safety integrity level 1) to SIL2, and SIL3. Each has a base set of requirements in regard to diagnostic coverage, mean time to failure, and many other factors. The RM42 device is targeted as a SIL3 capable device but is not yet fully certified as we are currently focused on certification of one of its superset devices (RM48). Similar devices are used in automotive, medical and industrial applications that require a high degree of safety and system tolerance to faults.

    The link below is to a report that provides a good overview of the standard and what it is.

    http://www.google.com/url?sa=t&rct=j&q=&esrc=s&frm=1&source=web&cd=4&cad=rja&ved=0CFYQFjAD&url=http%3A%2F%2Fwww.win.tue.nl%2F~mvdbrand%2Fcourses%2Fsse%2F1213%2Fiec61508_overview.pdf&ei=zXeoUuHfAsjO2AWvrIGACw&usg=AFQjCNH1rAeoX24f8mxmfZxq-32rZ2C79g

  • 0 in reply to Ki Long
    TI__Guru 59540 points

    Hello Ki,

    If your questions have been answered, it would be appreciated if you could take the time to verify the answer so that we may close the thread. If you have any additional questions, please let us know.