On Mon, 16 Oct 2006 19:17:36 +0100, you wrote:

>
>> > Do all the 18F have the ability to support a bootloader?  If
>> not, how does
>> > one determine if it can?
>> >
>>
>> It SEEMS to be related to whether the chip has eeprom or not. If it does,
>> I think you can generally bootload the flash. Otherwise, you cannot. Seems
>> to work so far...
>
>what 18 series chips do you know of that can't self program?
>
>given that every second gen 18 series flash chip i know of is covered by one
>programming spec and that programming spec is very similar to the self write
>sequence i'd be surprised if there were any that weren't.
>
>the only 18 series chips without eeprom i know of the top of my head are the
>2450 and 4450 and according to thier datasheets they can self write to
>flash.


Look for "Enhanced Flash", this means bootloadable and LVP.  Standard flash means HV program only.
Note that a while ago there were a few errors in the comparison table on the Microchip site - not
sure if they've fixed them yet, and the '87x was mis-labelled as it came out before they settled on
that nomenclature. 

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