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8051 port doubt
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har
Fri May 09 2008, 04:38PM
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what is the state of ports of 8051 family on reset???

also even if its FFFFFFh by default then why we have to write 1's in order to configure it as input port??
please help
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Ajay
Fri May 09 2008, 05:44PM
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ports are input by default that means 1 or High.

For more information on why its like this.. open 8051 User manual (from Intel) and see the internal construction of I/o ports. you will find latches and buffer there for reading and writing to port. Just read and look at the construction diagram you will get your answer yourself. If you still feel any problem understanding it then, I will explain it
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8051 Microcontroller Projects 8051 AVR tutorials PIC microcontroller, 8051 assembly language programming electronics and communication ECE CSE pdf ebooks library BE final year project ideas Embedded systems