MICROPROCESSOR AND MICROCONTROLLER

Detailed explanation-1: -In all members of the 8051 family, the first 32 bytes of DATA memory (0x00-0x1F) is grouped into 4 banks of 8 registers each. Programs access these registers as R0-R7. The register bank is selected by two bits of the program status word, PSW.

Detailed explanation-2: -The 8051 microcontroller consists of four register banks, such as Bank0, Bank1, Bank2, Bank3 which are selected by the PSW (Program Status Word) register. These register banks are present in the internal RAM memory of the 8051 microcontroller, and are used to process the data when the microcontroller is programmed.

Detailed explanation-3: -8051 microcontroller consists of four register banks, such as Bank 0, Bank 1, Bank 2, Bank 3 which are selected by the PSW (Program Status Word) register. 8051 has 32 general-purpose registers and the size of each register is 8-bit.

Detailed explanation-4: -The Data Pointer (DPTR) is the 8051’s only user-accessible 16-bit (2-byte) register. The Accumulator, R0–R7 registers and B register are 1-byte value registers. DPTR is meant for pointing to data. It is used by the 8051 to access external memory using the address indicated by DPTR.

Detailed explanation-5: -PCON is an 8-bit register used to control the baud rate during serial communication and 8051’s power control modes. Switch to Idle mode when IDL bit is set. SMOD => Double Baud rate when Serial port is used in mode 1, 2 or 3. GF1 => General purpose flag bit.