On Wed, Aug 9, 2017 at 8:22 AM, Ian Stewart <imstew...@gmail.com> wrote:

> Thanks David,
>
> Yes, the chip is detected and I'm able to read the chip just fine.  Would
> this indicate everything is hooked up properly?  Or could missing the /HOLD
> /WP /RESET cause write issues, but not read issues?  Knowing that would
> really help.
>

In general, yes, the behavior for disconnected inputs is undefined. Some
chips (like the Winbond W25Q-series) have internal pull resistors that
allow for pins to be left disconnected (the datasheet explicitly mentions
those). I don't see that in the Macronix datasheet though.
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