MICROCONTROLLER AND EMBEDDED SYSTEM SET-5

1. True or false. PWM allows the control of a DC motor with the same phase, but different amplitude pulses.

1. True 
2. False

2. True or false. The IRQ out pin of DS12887 is active loTrue 

1. True
2. False

3. The 8051 is a(n) _ _ _ -bit microprocessor. 

1. 2
2. 4
3. 8
4. 16

4. True or false. The DS89C420/30 is really an 8052 chip. 

1. True 
2. False

5. True or false. The DS89C420/30 has a loader embedded to the chip, therefore eliminating the need for ROM burner. 

1. True 
2. False

6. The DS89C420/30 chip has _ _ _ bytes of on-chip ROM. 

1. 16K
2. 8K
3. 0K
4. 2K

7. The DS89C420/30 chip has ___ bytes of RAM.

1. 8
2. 32
3. 128
4. 256

8. Which of the following instructions enables serial, Timer 0 and EX1 interrupts. 

1. MOV IE,#10010110B 
2. MOV TCON, #10010110B 
3. MOV IP#10010110B 
4. MOV SCON,#10010110B

9. True or false. The permanent magnet field DC motor has only two leads for and voltages.

1. True 
2. False

10. True or false. Just like a stepper motor, one can control the exact angle of a DC motor's move.

1. True 
2. False