ECET 340 Week 4 Homework

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?