On Mon, 29 Sep 2003 12:03:18 +0100, "Alan B. Pearce" wrote:

>
>Many of these devices seem to have internal weak pull-downs in them, biasing
>the pins so that the device will appear at the base address as though the
>pins are wired to 0. You then need only to pull up the address pins
>required. I have done exactly this with Atmel AT24C36/64 devices. They
>specifically state to leave the address pins open circuit when a low state
>is required on that pin, so it is not necessarily bad practice for these
>devices.

Thanks for that input. I wasn't aware of the specifics of those
particular inputs' special characteristics. By all means, if the data
sheet specifies such, it's certainly not bad practice for those
devices.

In the general case, though, open inputs always raise a red flag for
me. :=)


Regards, Bob

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