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ADUC7023 - what voltage is the internal pull-ups pulling up to on the I/O ports?

Question asked by mike.mandeville on Dec 13, 2012
Latest reply on Dec 17, 2012 by ADUzer

We are seeing something unexpected on P0.7 pin of the analog devices Aduc7023 device.  When we run it as an output it swings from 0 to 3.3V, when we configure it as an input with default pull  up settings, its sits at 2.5V.  When we run it as an SPI master pin MOSI (output) the pin sits at 2.5V when idle and swings between 0 and 3.3V when active.

 

We are speculating that its something to do with the internal pull-ups and seems to be pulled internally to 2.5V instead of 3.3V ?

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