IRI RO Assume Ro = 1500?, Ri = 500? and the maximum voltage output by a micropro
ID: 2292616 • Letter: I
Question
IRI RO Assume Ro = 1500?, Ri = 500? and the maximum voltage output by a microprocessor pin is 5V 20. (5 points) What is the correct initialization for l A. 0z0 B. 0z03 C. 0xOF D. 0xFF E. Answer not shown 21. (8 points) If PORTA PDOR-046, what is V? A. OV B. 1.66. V C. 3.33... V D. 3.75 V E. Answer not shown (8 points) If PORTA-PDOR = 0xA8, what is V? A. 0 V B. 1.66... V C. 3.33... V D. 3.75 V 22, E. Answer not shown (8 points) If PORTA-PDOR = 0x25, what is V? A. 0 V B. 1.66... V C. 3.33... V D. 3.75 V 23, E. Answer not shown (8 points) Assume an 8-bit analog-to-digital converter that uses the successive ap proximation algorithm, and has a range of 0 to 5 volts. If Vin 1.5 V and the first guess by successive approximation is 1000 0000, what is the third guess? A. 0100 0000 B. 0110 0000 C. 1100 0000 D. 1110 0000 E. Answer not shown 24.Explanation / Answer
Answer :- 20) Option B is the correct answer. For making both port as output port we must write 0x03, it makes other pins as input pin as we don't know rest pin status.
Answer :- 21) Option D is the correct answer. PORTA_PDOR = 0x46 = 0100_0110, so pin0 is at 0 V and pin1 is at 5V. So 5V from pin1 is divided at point V as-
V = 5*1500/(1500+500) = 3.75 V.
Answer :- 22) Option A is the correct answer. Since both the pins are at zero potential.
Answer :- 23) Option E is the correct answer. PORTA_PDOR = 0x25 = 0010_0101, so pin0 is at 5 V and pin1 is at 0V. So 5V from pin0 is divided at point V as-
V = 5*500/(1500+500) = 1.25 V.
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