Harold Hallikainen wrote:
>> Harold Hallikainen wrote :
>>
>>     
>>> Meanwhile, still trying to get the ICD-2 running on
>>> the 18LF6722 at 3.3V...
>>>       
>> Is 3.3V enough for a (bulk-) erase ?
>> Check the data sheet (or the programming specification).
>>
>> Most (?) PICs (well, not the new 3.3V-only types
>> i guess :-) ) needs at least 4.5V for a bulk erase...
>>
>> Jan-Erik.
>>     
>
> Well, it worked for a while. Seems like the ICD-2 otta be able to debug
> chips running at 3.3V. I've been doing it for a long time and just ran
> into trouble last week.
>
> I haven't really dug into programming algorithms, buld erase, etc. As I
> recall from bootload code, the PIC can erase something like 64 bytes of
> flash at a time, then program them, right? I did this (in a 5V system)
> where I have large tables of data that I wanted users to be able to
> change. I'm guessing a bulk erase is an erase of the whole chip at once.
> If this cannot happen at a low voltage, shouldn't the ICD-2 use another
> method to erase?
>
>   
No, I can bootload (self-program) at 3.3V all day long. I just can't 
BULKERASE.
My ICD2s debug perfectly at 3.3V.

Something has happened, Harold.

--Bob

> Again, thanks to everyone for the comments!
>
> Harold
>
>   

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