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need help 2732 and 2764 Top853 and Willem can not program

Discussion in 'Microcontrollers, Programming and IoT' started by rambo99, Apr 24, 2011.

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  1. rambo99


    Apr 24, 2011
    I have a top853 and willem programmer I am trying to program both 2732 and 2764 I have Erase them for 2 hours the 2732 set the Vpp at 21v and setup by the book the willem Eprom say Device is not Empty $000000 and the TOP853 say Error at Adress when I read the 2732 there is 0000 not FFFF both Eprom programmer are brand new and when I program 27C256 and 27C512 are OK
  2. Resqueline


    Jul 31, 2009
    I'm not sure if it applies to the one's you got there, but I seem to remember something about the old small EPROM's being kind of flakey and not always possible to reuse.
    When programming I have observed that it's important to pay attention to the make, as there are differences between them. Selecting the wrong make can destroy it.
  3. rambo99


    Apr 24, 2011
    need help on 2732 Rom

    I have new 2732 Rom are 21volts I have a Willem Programmer I have program/test ram has Error at 0x000000 chip=0x00 buffer = $000000 0xFF I have Erase for 10 min I have use the same Eraser for the 2764 and the 27512 Rom and Erase them OK but when I Erase the 2732 and do a check Device is not Empty $000000 can any one nelp me I have Done every thing by the book
  4. vejota


    Feb 15, 2012
    Burning 2732s and 2764s. God knows about other chips

    Why dont you try, under "CONFIG"a delay of 100 uS or 200 uS. I had it working this way, after fighting with it for about two days..! Good Luck.

    I still have problems burning 27C512s because these programmers and their software are not the same (I have two Top853 units).
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