Greetings,

Currently I'm working on a project which uses
the 8052 as an embedded microprocessor.
As such, Port 0 is used for Data/Addressing.

In my reading of the datasheet, it states that when used for this mode, Port 0 uses its own internal pullups. On my prototype I do not see this being reflected.

Is there a specific op/port setting I need to throw to force P0 to behave as a Digital Port instead of OpenCollector?