How many bytes are used by the given data directive of the 8051 microcontroller? DATA_1 DB "INDIA"
The question asks for the number of bytes used by the $DATA_1 DB "INDIA"$ directive in the 8051 microcontroller.
Understanding the 8051 DB Directive
The $DB$ directive in 8051 assembly language stands for "Define Byte". It is used to allocate memory space and initialize it with byte-sized data.
Analyzing the Data Directive
- The directive is specified as: $DATA_1 DB "INDIA"$
- $DATA_1$ is the label for the memory location.
- $DB$ indicates that the following data should be stored as bytes.
- The data provided is the string $"INDIA"$.
Calculating Bytes Used
Each character within the string literal requires one byte of storage. The string "INDIA" contains the following 5 characters:
- 'I'
- 'N'
- 'D'
- 'I'
- 'A'
Therefore, the total number of bytes used by this directive is the count of characters in the string, which is 5.
Conclusion
The $DATA_1 DB "INDIA"$ directive reserves 5 bytes in memory to store the string "INDIA".
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?
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:
- In the 8051 microcontroller, the program counter is ______ bits wide.
