A total of 4 ports are needed for a single 8253/54 timer and are addressed by___

Question

A total of 4 ports are needed for a single 8253/54 timer and are addressed by______ and_____. a. A2, A3, and CS b. A1, A3, and CS c. A0, A1, and CS. d. A1, A2, and CS e. All of the above Which one of the modes of 8253/54 Timer determines the shape of the output signal? a Mode 1, Mode 2, and Mode 3 only b. Mode 0, Mode 1, and Mode 3 only c. Mode 2, Mode 4, and Mode 5 only d. B, and C only e. none of the above In x86 8253/54 connection/programming when IRQ0 is activated the output frequency is: a. 1193 KHz b. 18.2 Hz c. 182 Hz d. 1.193 MHz e. a and b only In mode 3, 8253 generates____ a. Rectangular Wave b. Sine Wave c. Square Wave d. Triangular Wave e. All of the above Processor x86 toggles PB4 of port 61H in order to create a CPU-independent delay every______ a. 15.085 ms b. 15.085 Ms c 15.085s d. 15.085 mu s e. None of the above

Explanation / Answer

17.Answer: c.A0,A1 and CS.

18.Answer: D. b and c only

19.Answer: B.18.2 Hz

20.Answer: C.Square wave

21.Answer:a.15.085 ms

Related Questions

Navigate

• Browse (All)
• Browse A
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.