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Advanced Embedded Systems Interview Question:
Tell me can port 0 be used as input output port?
Submitted by: Muhammad☛ Yes, port 0 can be used as input output port.
☛ Port 0 is an open drain unlike ports 2,3,4.
☛ To use it as input or output the 10k ohm pull-up resisters are connected to it externally.
☛ To make port 0 as input port it must be programmed by writing 1 to all bits.
Example:
MOV A,#0FFH
MOV P0,A
Submitted by: Muhammad
☛ Port 0 is an open drain unlike ports 2,3,4.
☛ To use it as input or output the 10k ohm pull-up resisters are connected to it externally.
☛ To make port 0 as input port it must be programmed by writing 1 to all bits.
Example:
MOV A,#0FFH
MOV P0,A
Submitted by: Muhammad
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