A only RAMS B. only DRAM C only Flash ROM D. both RAM and ROM 2. An 8-bit microc

Question

A only RAMS B. only DRAM C only Flash ROM D. both RAM and ROM 2. An 8-bit microcontroller uses A an 8-bit address bus B only 8-bit control signals only 8-bit control signals only 8-bit control signals only 8-bit control signais only 8-bit control signals C. an 8-bit data bus D. an 8-bit program counters register 3. For the 8051 microcontroller, the lowest 8 bytes of on board RAM are -- A Bank 2 B. Bank 1 C. Bank 0 D. Bank 3 4. Which of the following 8051 registers contains the address of the next instruction to be executed? A. A B. RO-R7 C. PC D. B 5. Which of the following is actually stored in on-chip program memory? A. Java codes of the application program B. The assembly source files of the application program C. The hex object codes of the application program D. C codes of the application program 6. What is the maximum number of memory locations (bytes) that can be accessed by an address bus that is 16 bits wide? A. 8 B. 64 C. 64K D. 8K

Explanation / Answer

1. c) only flash ROM.

2. c) 8 bit data bus.

3. c) Bank 0.

4. c) PC.

5. c) the hex object codes of the application program.

6. c) 64K.

7. d)  data value.

8. d) Register addressing mode.

9. a) Direct addressing mode.

10. b) 40H

11. d) address bus.

12. d) MOVC A,@A+DPTR.

13. a) R0 and R1.

14. a) 09H.

15. a) -128 to + 127

16. a) RAM.

17. a) If the accumulator contents = 0.

18. a) a set of instructions that can be called more than once by a program.

19. 39H.

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