Hello Mike,

      I used the PICALL programmer to program a PIC16LF877A without
      any problems, the standard programming voltage for all PIC uCs
      are 13V as its described their datasheets.

      The "LF" means that the PIC works with voltages down to 2V (when
      the PIC is working), also, the LFs have 10MHz maximum frequency
      according to the datasheet.

      There are some programmer that are LVP (low voltage programming)
      such as the trivial lvp programmer found on the internet, that
      means that the programming voltage (Vpp) is only 5V.

      Checkout at http://www.finitesite.com/d3jsys/

Best regards,
 Kalun                            mailto:tech@tocache.org


Thursday, November 6, 2003, 12:45:46 PM, you wrote:

MH> Reposted with tag...

MH> Everything I've seen says that your programmer needs
MH> to verify at the actual operating voltage, or all bets are
MH> off on the success of the programming job.

MH> This brings me to another question:  What programmers
MH> are available to program PICs at low voltages?  I need to
MH> do the same, and so far I've been okay working with a
MH> WARP-13a and the 18LF2320, but I'm certainly going to
MH> want better verification of program data on products that
MH> get shipped.

MH> Should I be looking at the ICD2?

MH> Mike H.
>>I had the success of programming a standard PIC16F877A MCU.  However as my
>>application require a lower operating voltage of 3.3 -3.6 volts, I decided
>>to use the PIC16LF877A.  I was able to acquire it and had difficulty in
>>making it work around 3.3 volts.  It does however work on an operating
>>voltage of 5V.
>>
>>I am using the MPLAB and PICSTART Plus as my programmer.
>>
>>Is there any setting that I should set to make it work on the specified
>>voltage requirement?
>>
>>If I am missing somethings what would be best to address my problem?
>>
>>Thank you in advance for whatever assistance you can extend me.
>>
>>Very truly yours,
>>
>>Mel R. Guevarra
>>melrg@info.com.ph
>>
>>--
>>http://www.piclist.com hint: The PICList is archived three different
>>ways.  See http://www.piclist.com/#archives for details.

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