In fact the important point is that At Reset falling edge PSEN must be low. 24 oscillator period after reset falling edge PSEN become an output pin, so it must be release. It is recommanded to release PSEN
pin before the end of the 24 oscillator periods."
and
Now imagine what happens when PSEN sources high level but is connected to ground externally. It is overloaded and may be damaged.

I assume this is discussing Atmel
1) if you use NoTouch you can forget about PSEN low. (search here, someone published a version for Atmel).
2) the Philips recommendeation is to put a cpacitor in series with a switch to ground that takes care of the overload.

Erik