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Article #6257

Re: GAL LOGIC

#6257
From: Mark Zenier
Date: Wed, 09 Sep 1992 18:51
19 lines
1165 bytes
flux@sys6626.bison.mb.ca (John Kamchen) writes:
: I am having major problems trying to program a GAL chip.  
: I have blown three GAL chips so far.. 

: , the EDIT voltage was a steady 16.5v .. then came the /STR 
: pulse. ...
: .  The 10ms /STR pulse comes from a '221, so it thats 
: pretty stable.  
: I'm using part number  PALCE16V8H-25  from AMD.  

The algorithm you're using only works with GALs from
Lattice, National, or SGS-Thomson.  AMD parts are a different
design.   I guess after AMD/MMI sued Lattice, they felt they
couldn't go back and ask to be a second source.

The stuff I have indicates the bulk erase (row 63) should
be 50 milliseconds.  How do you get that out of a one shot?

Mark Zenier  markz@ssc.wa.com  
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Path: arc1-ca.pugleaf.net!sparky!uunet!ogicse!news.u.washington.edu!sumax!thebes!ole!ssc!markz
From: markz@ssc.wa.com (Mark Zenier)
Newsgroups: sci.electronics
Subject: Re: GAL LOGIC
Message-ID: <1992Sep09.185118.24527@ssc.wa.com>
Date: 9 Sep 92 18:51:18 GMT
Article-I.D.: ssc.1992Sep09.185118.24527
References: <R3sTqB1w164w@sys6626.bison.mb.ca>
Organization: SSC, Inc.,  Seattle, WA
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