Trying to control a weird I2C dialect, I'm finding that a bit of a problem pulling pins down.

I'm sure I saw about this somewhere, but can't find ait again - what conditions will trigger the chip to actually change the conditions of the pins - or do I moan at the hardware people?

Just inserting / removing NOPs in the hope that it will react in a certain way is both inelegant and seemingly inneffective.

I'm using an Atmel, in case it makes a difference.