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ADS8584S: Parallel interface mode (DB15/BYTE SEL pin selection)

Katsuhiko Kaizawa
Intellectual 2045 points
Part Number: ADS8584S

Hello support team,


To set parallel interface for ADS8584S, should both pins be tied to logic low for "PAR/SER/BYTE SEL" and "DB15/BYTE SEL"?
Table-6 in the datasheet p.40 mentioned both pin to "0", but section 8.4.1.12 in p.35 described "DB15/BYTE SEL" functions as digital output when "PAR/SER/BYTE SEL"=0.
Could you let me know which description is correct?

Regards,
Kaizawa

  • 0
    TI__Genius 17727 points
    Kaizawa,

    We are looking into this issue now and will get back to you soon.

    Art
  • 0
    TI__Mastermind 24940 points

    Hello,

    Let me clear up the confusion.

    To use Parallel interface, PAR/SER/BYTE SEL =0 , this makes DB15/BYTE SEL the MSB digital out

    To use Serial interface,  PAR/SER/BYTE SEL =1 and DB15/BYTE SEL =0

    To use BYTE Interface,  PAR/SER/BYTE SEL =1, and DB15/BYTE = 1

    In Table6,  I agree that it is not clear. When in parallel interface (PAR/SER/BYTE SEL =0) the DB15/BYTE SEL should be listed as MSB digital output, and not as 0.

    In the datasheet, page 35, section 8.4012 may also prove helpful.

    Regards, Cynthia