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The bit addressable memory in 8051 is compose from 210 bits:
- bit address space: 20H - 2FH bytes RAM = 00H - 7FH bits address;
- SFR registers;
The following addresses are NOT bit addressable, only 1-byte addressable:
- 32 bytes RAM from 00H to 1FH (R0 - R7 registers in all four banks);
- 80 bytes RAM general user from 30H to 7FH.
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Why 8051 is called 8 bit?
Because its a microcontroller with an 8 bit data bus width.
What is psw in 8051?
It is program status register.It i 8 bit ,bit addressable register.It consists of four maths flag.
How do you add and subtract 16 bit numbers using 8051 microprocessor?
The 8051 is a microcontroller, not a microprocessor. To add or subtract, use the ADD or SUBB opcodes.
What is the external data memory capacity of 8051 and why?
65536 bytes, because the 8051 family has a 16 bit external address buss.
Advantages of at89c51 microcontroller over 8051 microcontroller?
the 8051 microcontrroller is the name doesnt matter easy or not....but the maiin and imp diff between both is at89s51 represents the 8051 chip no....along with the name of company i.e atmel, so all n all both are same thing ...... 89c51 have RISC architecture and contains less no of opcodes which are easy for programming. so iti is preferred than 8051.
