16F57 Programming with PICStart Plus

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dchisholm
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2006/05/03 12:43:01 (permalink)
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16F57 Programming with PICStart Plus

When programming the 16F57 (or 16F54/55/57 family) with a PICStart Plus, is it necessary to lift pin 26?  This was required for the non-Flash 16C5X parts (see Tech Note #22) but I can't find a confirmation that it's still required for 16F5X parts.

(Yes, the intuitively obvious answer is "Try it and see.".  All of our PICStarts have been rounded up and loaned to a contract assembly house 50 miles away.  I have to write Manufacturing Process documents for him - and if that pin has to be isolated, I'll also have to find some adapter sockets.)

Dale

Edited to correct link 20 May 2006

Why does the Forum software not allow me to post a correct link to Tech Note #22?  It should be < http://ww1.microchip.com/downloads/en/DeviceDoc/etn22.pdf> but the "Insert Link" tool insists on changing it when I try to post it!!
post edited by dchisholm - 2006/05/20 09:00:23
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    jenninc
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    RE: 16F57 Programming with PICStart Plus 2006/05/10 17:53:39 (permalink)
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    Hello Dale:
     
    It is a must that Pin 26 of the 16C55A, 16C57C, 16C57 and the 16F57 be bent so that it will not touch the ZIFF socket.  If not, the device will not program properly; a blank device when Read or Blank Check is performed will appear not to be blank.
     
    Best Regards,
     
    Cynthia
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    dchisholm
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    RE: 16F57 Programming with PICStart Plus 2006/05/20 08:43:29 (permalink)
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    Thanks for your reply, Cynthia.  Sorry I didn't notice sooner!

    Actually when I didn't get a response after a day or so I gathered up some 'F57's, made the trip, and did some experimenting.  Like you said - that pin still has to be isolated from the programmer, even on the newer Flash parts.  But it's good to see an "official" statement confirming that.  Perhaps Microchip already has a document change in-process to explicitly mention the 16F5X family in Tech Note #22.

    Thanks again for your attention.

    Dale
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