> Thanks Bob, any sources for a cheap eraser? I
> can build one if the light source is not critical.
> And how long do they take to erase normally?

I have a Datarase II, which can erase 4 chips in 20 minutes.  I sorta
remember that I got it from Jameco for well under $100.

> Last question (I promise!) if using the internal
> 4MHz osc on the OTP parts, does it need calibrating
> or what range freq are they in?

The W register gets loaded with the factory-determined calibration values
right before your code starts executing.  You can then write W to OSCAL if
you wish.  I sorta remember they actually write a MOVLW into the last
program memory location, then start execution there.  Whatever, this is all
spelled out nicely in the data sheet.


*****************************************************************
Olin Lathrop, embedded systems consultant in Devens Massachusetts
(978) 772-3129, olin@embedinc.com, http://www.embedinc.com

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