8051 Program Counter Bit Width
The Program Counter (PC) is a special register within the 8051 microcontroller's CPU. Its function is to store the memory address of the next instruction that the processor will fetch and execute.
The standard 8051 architecture is designed with a 16-bit Program Counter.
This 16-bit size enables the PC to point to any location within a $2^{16}$ byte address space, translating to 65,536 unique addresses (64KB). This is essential for accessing the program instructions stored in the microcontroller's memory.
Thus, the program counter in the 8051 is 16 bits wide.
Important Questions from Microprocessors and Microcontrollers
Data and address bus width of 8085 microprocessor respectively are
How many bits are used in the data bus of 8051 ?
- Which of the 8051 ports need pull-up resistors to function as an I/O port?
How many bytes are used by the given data directive of the 8051 microcontroller?
DATA_1 DB "INDIA"
A. Microcontrollers are normally less expensive than microprocessors.
B. The 8051 microcontroller has three on-chip timers.
C. Mode 2 of 8051 timer is used to set the baud rate.
D. For the LCD to recognize information at the data pins as data, the register select (RS) pin must be set to low.
E. A driver must be placed between the micrcontroller and the stepper motor.
Choose the correct answer from the options given below:
