Byron A Jeff wrote:
> On Sat, Feb 24, 2007 at 08:53:06AM -0500, Byron A Jeff wrote:
>   
>> On Thu, Feb 22, 2007 at 07:21:24AM -0500, Olin Lathrop wrote:
>>     
>>> Alan B. Pearce wrote:
>>>       
>> So you need the following:
>>
>> 1) Nanowatt enabled
>> 2) BODEN enabled with low ram retention voltage (seemes to be 4.35V and 1.5V
>> respectively for all the sheets I checked)
>> 3) Decoupled BODEN and PWRTMR
>>     
>
> I missed the obvious which is the part needs to be self programmable.
>
>   
>> I'm only bummed out because the 16F887 doesn't decouple BODEN and PWRTMR. That
>> would have been the perfect target for me. 
>>     
>
> Now I'm confused. I'm almost certain that I read for the 16F887 that the 72ms
> PWTTMR would be invoked on a BOD regardless of if the bit were set or not.
> Wistfully I pulled the datasheet again (a different one?) And found this on
> page 210 (emphesis mine):
>
> "The Power-up Timer will now be invoked, IF ENABLED and will keep the chip in
> Reset an additional 64 ms."
>
> Now that's excellent news! I must have been reading a different data sheet
> because note this line says 64 mS and I know I read a page that said 72 mS.
>
> To program, just wiggle the power line. Wow!
>
> BAJ
>   
for F88: WHAT reg/bit is tested to determine the voltage bit HI or LO? 
is it BOD? What is the procedure to determine a
data flag that means "go to programming mode?" I have some ideas, but 
you guys are heavy hitters... what
happens next?

--Bob
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