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how we are going access both 64k data memory and 64k code memory using 16 address lines in 8051

Hai,

I have a doubt on 8051 micro-controller, i.e for 8051 micro-controller max code memory will be 64k and max data memory is 64k.So how we are going access this both 64k memory of code memory and 64k memory of data memory using 16 address lines in 8051.

Siva Krishna