Que: 41 What is the clock source for the timers?
|
| a. some external crystal applied to the micro-controller for executing the timer |
| b. from the crystal applied to the micro-controller |
| c. through the software |
| d. through programming |
(b). from the crystal applied to the micro-controller
Que: 42 What is the frequency of the clock that is being used as the clock source for the timer?
|
| a. some externally applied frequency f’ |
| b. controller’s crystal frequency f |
| c. controller’s crystal frequency /12 |
| d. externally applied frequency/12 |
(c). controller’s crystal frequency /12
Que: 43 What is the function of the TMOD register?
|
| a. TMOD register is used to set different timer’s or counter’s to their appropriate modes |
| b. TMOD register is used to load the count of the timer. |
| c. Is the destination or the final register where the result is obtained after the operation of the timer |
| d. Is used to interrupt the timer |
(a). TMOD register is used to set different timer’s or counter’s to their appropriate modes
Que: 44 What is the maximum delay that can be generated with the crystal frequency of 22MHz?
|
| a. 2978.9 sec |
| b. 0.011 msec |
| c. 11.63 sec |
| d. 2.97 msec |
Que: 45 Auto reload mode is allowed in which mode of the timer?
|
| a. Mode 0 |
| b. Mode 1 |
| c. Mode 2 |
| d. Mode 3 |
Que: 46 Find out the roll over value for the timer in Mode 0, Mode 1 and Mode 2?
|
| a. 00FFH,0FFFH,FFFFH |
| b. 1FFFH,0FFFH,FFFFH |
| c. 1FFFH,FFFFH,00FFH |
| d. 1FFFH,00FFH,FFFFH |
Que: 47 What steps are followed when we need to turn on any timer?
|
| a. load the count, start the timer, keep monitoring it, stop the timer |
| b. load the TMOD register, load the count, start the timer, keep monitoring it, stop the timer |
| c. load the TMOD register, start the timer,load the count, keep monitoring it, stop the timer |
| d. none of the mentioned |
(b). load the TMOD register, load the count, start the timer, keep monitoring it, stop the timer
Que: 48 If Timer 0 is to be used as a counter, then at what particular pin clock pulse need to be applied?
|
| a. P3.3 |
| b. P3.4 |
| c. P3.5 |
| d. P3.6 |
Que: 49 In the instruction “MOV TH1,#-3”, what is the value that is being loaded in the TH1 register ?
|
| a. 0xFCH |
| b. 0xFBH |
| c. 0xFDH |
| d. 0xFEH |
Que: 50 TF1, TR1, TF0, TR0 bits are of which register?
|
| a. TMOD |
| b. SCON |
| c. TCON |
| d. SMOD |