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ADC of F28335 and F28069

Sneha Thakur
Expert 2660 points

HI

In one of the documents found on TI website i found that ADC in F28335 is SEQ and on F28069 is SOC:

I read the technical documents for both but I still Can't make out the difference.Is there any?If then what is it?

Kindly help

Thanks Sneha

  • 0
    Guru 192875 points

    Hi Sneha,

    F28335 is a Delfino device and is very very powerful if compared with F28069 which is a Piccolo Device. The major difference being the computation speed is tremendous in F28335, number of communication buses, number of ADCs and ePwms and more.

    On the other hand F28069 has a CLA unit, VCU & USB peripheral (optional)

    Regards,

    Gautam

  • 0 in reply to Gautam Iyer
    Expert 2660 points

    Hi Gautam

    Sneha

    Gautam Iyer said:
    F28335 is a Delfino device and is very very powerful if compared with F28069 which is a Piccolo Device. The major difference being the computation speed is tremendous in F28335, number of communication buses, number of ADCs and ePwms and more.

    I know that .I am particularly asking the difference between ADC's of both and why it has been specifically menetion SEQ based for 28335 and SOC based for 28069.

    Thanks

  • 0 in reply to Sneha Thakur
    Guru 192875 points

    Sneha Thakur said:
    I am particularly asking the difference between ADC's of both and why it has been specifically menetion SEQ based for 28335 and SOC based for 28069.

    Ok...

    F28335 has a special sequencer that has a auto-sequencing capability.

    This facility is not available in F28069. Read the below data for F28069:

    Regards,

    Gautam

  • 0 in reply to Gautam Iyer
    Expert 2660 points

    Thanks Gautam

    I was referring a wrong datasheet for F28069 by mistake..

    Sneha

  • 0 in reply to Sneha Thakur
    Guru 192875 points

    Sneha Thakur said:
    I was referring a wrong datasheet for F28069 by mistake..

    No problem... Happens!

    Goodluck & Regards,

    Gautam

  • 0 in reply to Gautam Iyer
    TI__Guru 60865 points

    Hi Sneha,

    The F28335 ADC can be configured for 1 sequence of up to 16 conversions or 2 sequences of up to 8 conversions each.  The first sequencer can be triggered by ePWMA or an external pin and the second sequencer can be triggered by ePWMB (the combined sequencer can be triggered by all 3 sources). The S+H window duration can be configured globally to the ADC for all conversions.

    The ADC for 'Piccolo' series devices (including F28069) has 16 individual SOCs.  Each SOC can be configured for a different trigger source (each of the 3 CPU timers, ePWM A or B from each of the ePWM modules, or an external pin) and each can be configured for a different S+H duration.  The 16 SOCs can be combined into any number of individual sequences by using the same trigger source for multiple SOCs.

    In most cases, the SOC based sequencer is more flexible and powerful, but there are some sampling schemes that work better on the F28335 style sequencer. 

  • 0 in reply to Devin Cottier
    Expert 2660 points

    Thanks Devin Cottier

  • 0 in reply to Gautam Iyer
    Prodigy 210 points

    Hi,

    For the same float point multiplication, for example 1.414*1.732, how many cycles 28335 needs and how many 28069 (with or without CLA)?

    Because they both support float point naturally.

    Thanks.

  • 0 in reply to Lanhua Zhang
    Guru 192875 points
    Hi LZ,

    First of all, please start new posts for new queries.
    Secondly, yes both have floating point units but F28069 has max of 90Mhz speed whereas F28335 has a max of 150MHz.
    That being the difference you can calculate how speedy will the calculations be with F28335.

    Regards,
    Gautam
  • 0 in reply to Gautam Iyer
    Prodigy 210 points

    Thanks Gautam.

    If they have the same clock speed, the time consumed for that calculation should be same?

    Sorry I didn't pay attention of the title of this post.

  • 0 in reply to Lanhua Zhang
    Guru 192875 points
    I guess so, as I've not tested the above config personally - won't be able to comment.

    Regards,
    Gautam