Digital Electronics - The 8051 Microcontroller - Discussion
Discussion Forum : The 8051 Microcontroller - General Questions (Q.No. 20)
20.
The total external data memory that can be interfaced to the 8051 is:
Discussion:
4 comments Page 1 of 1.
Bhai said:
8 years ago
All options are wrong. It can access only 60K of memory externally, because it internally have 4K of ROM.
Suresh.p.v said:
8 years ago
64KB & PC=16-Bit.
Ganesh Raveendran said:
1 decade ago
Program counter(PC) size = 16 bit in binary.
=> can store addresses up to 2^16 = 65536 (total memory space) in decimal.
i.e. from 0 to 65535 in decimal and 0000h to FFFFh in hex.
1 kb=1024 bytes.
Converting 65536 bytes to Kilo bytes.
------------------------------------
PC can store 65536 'bytes' of memory space = 65536/1024 = 64K.
=> can store addresses up to 2^16 = 65536 (total memory space) in decimal.
i.e. from 0 to 65535 in decimal and 0000h to FFFFh in hex.
1 kb=1024 bytes.
Converting 65536 bytes to Kilo bytes.
------------------------------------
PC can store 65536 'bytes' of memory space = 65536/1024 = 64K.
Navil Smith said:
1 decade ago
As the number of address lines of 8051 is 16 therefore
total memory that can b interfaced=(2^16=65536) i.e. 64K
total memory that can b interfaced=(2^16=65536) i.e. 64K
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