Following up on my own question:

    My initial message is not clear.  I am asking about the value of=20
the Vdd voltage during programming.  Section 6 of the programming=20
spec (DS39622L) answers my question assuming this is the correct=20
document for the "LF" devices.  The device overview section does not=20
mention "LF" parts.

    Parameter D111 : VDD Supply Voltage During Programming

Min    Max           Conditions
2.00  5.50 V    Externally timed,Row Erases and all writes
3.0   5.50 V    Self-timed, Bulk Erases only (Note 3 : At 0=B0C-50=B0C.)


-- Alan


At 03:37 PM 1/17/2011, I write:
 >Hi,
 >
 >    I will be using the PIC18LF2580 in a 3.3V circuit.  In
 >considering the interface for ICSP it seems that the programming
 >voltage must be 5V.  Is this correct?  I can not find a definitive
 >statement in the data sheet nor the programming specification.  The
 >"device overview" section on the first page of the programming spec
 >does not mention any of the "LF" parts.  Is there another document
 >that covers these devices?
 >
 >Thanks for any guidance,
 >
 >    Alan
 >
 >
 >PIC18F2XXX/4XXX Flash MCU Programming Specification
 >http://ww1.microchip.com/downloads/en/DeviceDoc/39622L.pdf
 >
 >
 >PIC18F2480/2580/4480/4580 Data Sheet
 >http://ww1.microchip.com/downloads/en/DeviceDoc/39637d.pdf
 >
 >
 >PIC18F2580
 >http://www.microchip.com/wwwproducts/Devices.aspx?dDocName=3Den020613
 >
 >--
 >http://www.piclist.com PIC/SX FAQ & list archive
 >View/change your membership options at
 >http://mailman.mit.edu/mailman/listinfo/piclist

--=20
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