I had a quick look at the datasheet and I see that the Oscillator Start-up Timer is not invoked if an internal clock is selected. I couldn't find a figure for how long the internal clock takes to stabilize but the "Oscillator Wake-up from Sleep start-up time" is 8us (worst case)

I think it's important to note that the power up timer is optional, so MC must forsee a situation where it is not used.

If you believe that some delay after power up is necessary, Art's idea is the way to go.

if you have space, how about a string of NOPs at the reset vector?

George

How long is the power off for?