At 07:31 PM 1/9/2004 -0600, you wrote:
>Oops - this was meant to be in reply to Spehro.

You can set the port pin low or high with movlw/movwf,
which doesn't read the pin state, then write to the TRIS
register.

The main condition I think you want to avoid is actively
driving it low, after it's been high, because that discharges
the output capacitor through a sneak path in the LT1790 (diode
and forward-biased collector-base junction). Just
a guess as to what's happening.

Bset regards,

Spehro Pefhany --"it's the network..."            "The Journey is the reward"
speff@interlog.com             Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog  Info for designers:  http://www.speff.com

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