Dan Michaels wrote: > I was referring to the situation where you are attempting to use an > analog-configured pin as a digital output, which is what I thought > Tony was asking about ??????????? Dan: That IS what he was asking about, but the problem with analog-in/digital-out pins has nothing to do with "successive" writes; that's an entirely different issue related to capacitance and the fact that I/O Writes happen at the end of an instruction cycle while I/O Reads happen at the beginning of the cycle. Tony's problem will occur even if many minutes elapse between writes to a port. The problem you described will happen whether or not the pins are configured as analog inputs, but only under certain circumstances, and then only if the writes occur in very rapid succession. > BTW, tell me why I can't ever get my hands on any Cypress FIFOs. > Nobody ever seems to have them. Has Cypress stopped manufacturing > them? Don't ask me, man... I just work there. Seriously, though, the entire semiconductor industry is feeling the supply-and-demand squeeze right now; nearly every vendor (with, perhaps, the exception of Microchip Technology) has put its parts on allocation, which means that customers who want only a small quantity of parts may have to wait a LONG time to get them. It's a cyclical phenomenon in the industry; I wish it didn't happen, but the reality is that a new chip fab costs over a billion dollars (WAY over a billion if you're doing anything state-of-the-art like 300-mm wafers or 0.13-micron processes), and a vendor will lose customers if his parts cost just pennies more than someone else's. No vendor, therefore, can afford to have any unused production capacity... And since you can't build half a fab, or just ten percent of a fab, or lease a fab -- not when everyone else is ALSO at full capacity, anyway -- we all do the tightrope- balancing thing, striving for exactly 100% utilization of our fabs at all times. Naturally, each of us occasionally falls off the tightrope. Cypress seems to ba able to meet its customers' demands better than some companies -- not to name names, but have you tried to buy an AVR lately? -- but I'll honestly admit that we're not perfect. All I can suggest is that you place your order early and wait it out. Sorry... -Andy P.S. Of course, the opinions expressed in this email do not necessarily represent those of Cypress Semiconductor Corporation; as I said, I just work there. === Andrew Warren - fastfwd@ix.netcom.com === Fast Forward Engineering - San Diego, California === http://www.geocities.com/SiliconValley/2499 -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.