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Recent content by Ivanw

  1. I

    what is Data Mask in RAM

    data mask ram :?: I saw a RAM chip define two pins as Data Mask , and they are LDQM & UDQM . What is "Data Mask" ? Mask the output data ?
  2. I

    what is NRZ encoding ?

    nrz encoding what is NRZ encoding ? It's said that this encoding can run fast clock up to 2.5Gb :)
  3. I

    If SSC is used is the clock slowed down ?

    About SSC [/b] SSC------ Spread spectrum clocking is a technique used to modulate the clock frequency slowly so as to reduce EMI radiated noise at the center frequency of the clock. :?: If use SSC ,then the clock is slowed down ?
  4. I

    Adobe Acrobat Professional in Linux ?

    o , no I installed 4.0 but now using 5.8 :)
  5. I

    Adobe Acrobat Professional in Linux ?

    I use the Acrobat 4.0 and 5.8 version in Redhat 8.0 now , sometimes it would have a char set problem , but after all , It's usefull :) :)
  6. I

    What exactly is a FR4 Board ?

    FR4 Board ? some one help , 3x :)
  7. I

    What does ppm stand for ?

    what is ppm ? some day , in a book I saw "the clock is +/- 100 ppm ", and I don't know what is "ppm". some one help , 3x (thanks )!
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