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07/23/01 16:21
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#13435 - RE: logic comparison on pins
Hi Erik,

not the inputs get enabled, the outputs are set to weak high level, which then can be overwritten from an external signal.
Theoretical the strong low level can also be overwritten from external but this exceed the operating conditions and can cause heating and damage.
The inputs are enabled forever and reflects always the internal or external signal, depending on which was the strongest.


And if the other pins already in use, do only:

orl p2, #7

to let the other pins unchanged.
But in real you must do nothing, since any proper reset puts any port to its default state 0ffh.


Peter


List of 9 messages in thread
TopicAuthorDate
logic comparison on pins            01/01/70 00:00      
RE: logic comparison on pins            01/01/70 00:00      
RE: logic comparison on pins            01/01/70 00:00      
RE: logic comparison on pins            01/01/70 00:00      
RE: logic comparison on pins            01/01/70 00:00      
RE: logic comparison on pins            01/01/70 00:00      
RE: logic comparison on pins            01/01/70 00:00      
RE: logic comparison on pins, Roger            01/01/70 00:00      
RE: logic comparison on pins, Erik            01/01/70 00:00      

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