MICROCONTROLLER AND EMBEDDED SYSTEM SET-2

 1. On power-up, which of the register banks is used?

1. RB 2 
2. RB 3 
3. RB 1 
4. RB 0

2. Do the ORG ad END directives produce opcodes?

1. These are pseudo instructions and hence will not produce opcodes. 
2. Depends on type of compilers used 
3. These are real instructions and hence will produce opcodes. 
4. Depends on type of Assemblers used

3. The AT89C51 microcontroller contains ___ data lines, ___ address lines and ___ IO lines.

1. 16, 8, 32 
2. 8, 8, 4 
3. 8, 16, 4 
4. 8, 16, 32

4. The size of bit addressable RAM is ______ bits.

1. 16 
2. 128 
3. 8 
4. 80

5. Find the CY and AC flag bits for the following code. MOV A,#0FEH ADD A, #01H

1. CY=1 and AC=0. 
2. CY=1 and AC=1. 
3. CY=0 and AC=0. 
4. CY=0 and AC=1.