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Microprocessor has 16 address lines and microcontroller has 20 address lines
No, pic16f877A is powered by a 8 bits pic core. the 877A is an upgrade for the 877 version. same for the sister microcontroller pic16f876A and pic16f876. I ve been fan of this microcontroller for years. It is powerful and you can do a lot of thing with it. You can you can have it from www tmartis com together with many other stuff that you can purchase together. I always do my purchases from there. Have fun
a return address should have 2 lines
12
16KB, or 16384 bytes, can be addressed with 14 address lines. (214 = 16384)
A 2K X 8 memory requires 11 address lines and 8 data lines
In the 2k*16 , the 11 address lines are required and the 16 input-output lines are required..
17 address lines and 8 data lines. 2^17=128k
20 address line available in 16 to 1 multiplexer 16 for input lines and 4 will be selection lines.
32
how many interrupts in 8051
The number of address lines needed to access N-KB is given by log2N Then the number of address lines needed to access 256KB of main memory will be log2256000=18 address lines.