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ECET340

 

Page 324, problems 46, 48

 

46. For the PAC1 counter, which pin is used for the input pulse?

 

      

 

48. Program PACA to be an event counter. Use 16-bit mode, and display the binarycount on PORTB and PORTA continuously. Set the initial count to 20,000.

 

 

 

Page 467, review questions 1-4

 

1.In a DAC, input is __ (digital, analog) and output is __ (digital, analog).

 

 

 

2.In an ADC, input is _ (digital, analog) and output is __ (digital, analog).

 

 

 

3.DAC0808 is a(n) __-bit D-to-A converter.

 

 

 

4.

 

(a) The output of DAC0808 is in __ (current, voltage).

 

(b) True or false. The output of DAC0808 is ideal to drive a motor.

 

 

 

Page 469, problems 55-60

 

55.True or false. DAC0808 is the same as DAC1408.

 

 

 

56.Find the number of discrete voltages provided by the  n-bit DAC for the following:

 

(a)  n = 8

 

  

 

(b)  n = 10

 

   

 

(c)  n = 12

 

     

 

 

 

 

 

57.For DAC1408, if Iref = 2 mA, show how to get an I out of 1.99 when all inputs are HIGH.

 

         

 

58.Find the Iout for the following inputs. Assume Iref = 2 mA for DAC0808.

 

(a) 10011001

 

   

 

(b) 11001100

 

   

 

(c) 11101110

 

     

 

(d) 00100010

 

      

 

(e) 00001001

 

      

 

(f) 10001000

 

     

 

 

 

59.To get a smaller step, we need a DAC with _ (more, fewer) digital inputs.

 

 

 

60.To get full-scale output, what should be the inputs for DAC?

 

   

 

 

 

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