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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Because its a microcontroller with an 8 bit data bus width.
It is program status register.It i 8 bit ,bit addressable register.It consists of four maths flag.
The 8051 is a microcontroller, not a microprocessor. To add or subtract, use the ADD or SUBB opcodes.
65536 bytes, because the 8051 family has a 16 bit external address buss.
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.