Searching \ for '[Bulk] Re: [PIC] default configuration bits' in subject line. ()
Make payments with PayPal - it's fast, free and secure! Help us get a faster server
FAQ page: www.piclist.com/techref/microchip/devices.htm?key=pic
Search entire site for: 'Re: [PIC] default configuration bits'.

Exact match. Not showing close matches.
PICList Thread
'[Bulk] Re: [PIC] default configuration bits'
2008\11\27@120320 by Isaac Marino Bavaresco

flavicon
face
Wouter van Ooijen escreveu:
>> Olin, do you think 1 - is factory programming value, or is value at POR
>> (see page 25 of the programming spec, DS41244E)?
>>    
>
> POR is not relevant: power cycling a PIC does not affect the state of
> configuration bits (or other flash-stored bits). It is the 'after erase'
> that is relevant.
>
>  
>> Finally, I don't think that PIC come with a known state of Configuration
>> Bits.
>>    
>
> Chips are sold in erased state.
>  
This don't matter either, because your programmer almost surely (just to
not say "surely") will erase the part before programming (my Picstart
Plus and ICD2 always do). Even if it doesn't, you may do a chip erase
before programming.

As a note, I already received PIC samples from a local Microchip
distributor already programmed with other people's program (not code
protected).
It appeared to be the control firmware for a breath alcohol tester
(there was ASCII strings with messages).



__________________________________________________
Faça ligações para outros computadores com o novo Yahoo! Messenger
http://br.beta.messenger.yahoo.com/

2008\11\27@124941 by olin piclist

face picon face
Isaac Marino Bavaresco wrote:
> As a note, I already received PIC samples from a local Microchip
> distributor already programmed with other people's program (not code
> protected).
> It appeared to be the control firmware for a breath alcohol tester
> (there was ASCII strings with messages).

This is not something I would not let slide unless these were free samples
and they told you they might be pre-used.  In some products the PIC could be
programmed in circuit using low voltage programming and rely on the fact
that LVP has not been disabled.

This is above and beyond expecting new parts that haven't been abused in
non-obvious ways.


********************************************************************
Embed Inc, Littleton Massachusetts, http://www.embedinc.com/products
(978) 742-9014.  Gold level PIC consultants since 2000.

2008\11\27@133834 by olin piclist

face picon face
Olin Lathrop wrote:
> This is not something I would not let slide

Oops, one too many "not".


********************************************************************
Embed Inc, Littleton Massachusetts, http://www.embedinc.com/products
(978) 742-9014.  Gold level PIC consultants since 2000.

2008\11\27@141208 by Isaac Marino Bavaresco

flavicon
face
Olin Lathrop escreveu:
> Isaac Marino Bavaresco wrote:
>  
>> As a note, I already received PIC samples from a local Microchip
>> distributor already programmed with other people's program (not code
>> protected).
>> It appeared to be the control firmware for a breath alcohol tester
>> (there was ASCII strings with messages).
>>    
>
> This is not something I would not let slide unless these were free samples
> and they told you they might be pre-used.  In some products the PIC could be
> programmed in circuit using low voltage programming and rely on the fact
> that LVP has not been disabled.
>
> This is above and beyond expecting new parts that haven't been abused in
> non-obvious ways.
>
>  

I don't know if those were free samples, a friend of mine got three
parts (from the distributor) so I could make a prototype for him.

Certainly a client ordered to the distributor a batch of preprogrammed
parts with his own code, somebody forgot to turn on the code protection
and somebody took three (or more?) parts from the batch and sent to my
friend as samples.

I think about what the code's owner would think if he discovered that
his code leaked this way...


__________________________________________________
Faça ligações para outros computadores com o novo Yahoo! Messenger
http://br.beta.messenger.yahoo.com/

More... (looser matching)
- Last day of these posts
- In 2008 , 2009 only
- Today
- New search...