Start-up is fine. There is an automatic start-up delay of about 18ms 
*always* (basically a Power on timeout - called the Device Reset Timer 
in the spec).

This timer starts *after* MCLR goes high. It should be enough for a 
clean startup, and my (limited) experience indicates it is fine.

In re-jigging my TX to use a wake-on-change mechanism as a trigger, it 
is even better, because the device is never powered off, and the DRT is 
set to 10us instead of 18ms on reset.
(Remember, the 10F parts do a reset on pin change during sleep, they do 
not continue from the instruction after the sleep).

Thanks for the suggestion for the one-shot though. Given the very low 
power drain of the 10F in sleep though, it seems silly to even power it 
off. The 10F drain is less than the battery self-discharge.

Rolf

Bob Axtell wrote:
> What I have used is those SOT23-8 one-shots at $0.22 USD a pop from 
> fairchild. Set the length
> of the O/S to 10mS, and program the PIC10F to go to sleep when it is 
> done, to save power.
>
> The Q output of the O/S powers the PIC10F.  The current needed for these 
> devices is very, very low.
> They operate at 2V just fine.
>
> I must ask you another question... I have rejected the PIC10s because 
> they have no BROWNOUT
> detect, which I think is important for key tasks like this. Do they 
> startup reliably?
>
> --Bob
>
>
>   

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