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ADC Synchronization

Discussion in 'Microcontrollers, Programming and IoT' started by ed181, Nov 7, 2013.

  1. ed181

    ed181

    15
    0
    Dec 27, 2010
    Hi

    Can anyone explain to me why i need to synchronise an ADC when communicating via SPI? I don't really understand the purpose of the sync command. Am i right in thinking that as long as I allow enough time between each byte i send there's no need to syn the uC and ADC?

    Also is it possible to communicate with a ADC whilst ignoring the DRDY Pin?

    thanks in advance
     
  2. Harald Kapp

    Harald Kapp Moderator Moderator

    9,277
    1,878
    Nov 17, 2011
    1) Which ADC are you using?

    2) Sync is typically used to synchronize the ADC to a reference sample rate or to synchronize multiply ADCs.

    3) It depends on the ADC what you receive when you try to read data befor DRDY. One ADC may deliver old data (repeat the lasst sample), another will deliver garbage, yet another one will not respond at all.

    Read the data sheet and app-notes of your ADC to find in-depth information.
     
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