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- Question
The RAM circuit given below is suspected of being bad. A check with a logic probe shows pulse activity on all of the address lines and data inputs. The / line and inputs are forced HIGH and the data output lines are checked with the logic probe. Q0, Q2, and Q3 show a dim indication on the logic probe; Q1 indicates a HIGH level on the logic probe. What, if anything, is wrong with the circuit?
Options- A. The Q0, Q2, and Q3 output lines are open; the chip is defective.
- B. The Q1 line appears to be shorted to Vcc; replace the chip.
- C. The outputs should be active only when the / line is held LOW, so the circuit is behaving normally considering the fact that the line is HIGH.
- D. The EN input should be forced HIGH and the outputs rechecked; if they are still giving the same indications as before, then the three outputs are definitely open and the IC will have to be replaced.
- Correct Answer
- The Q1 line appears to be shorted to Vcc; replace the chip.
- 1. Which is not a part of a GAL16V8's OLMC?
Options- A. TSMUX
- B. OMUX
- C. FMUX
- D. PSMUX Discuss
- 2. Output will be a LOW for any case when one or more inputs are zero for a(n):
Options- A. OR gate
- B. NOT gate
- C. AND gate
- D. NOR gate Discuss
- 3. The sum of 11101 + 10111 equals ________.
Options- A. 110011
- B. 100001
- C. 110100
- D. 100100 Discuss
- 4. Hex is often used in digital applications as a shorthand way to represent strings of bits.
Options- A. True
- B. False Discuss
- 5. Four cascaded modulus-10 counters have an overall modulus of ________.
Options- A. 10
- B. 100
- C. 1,000
- D. 10,000 Discuss
- 6. VHDL is not a new language.
Options- A. True
- B. False Discuss
- 7. Which is not a removable drive?
Options- A. Zip
- B. Jaz
- C. Hard
- D. SuperDisk Discuss
- 8. Which microprocessor has multiplexed data and address lines?
Options- A. 8086/8088
- B. 80286
- C. 80386
- D. Pentium Discuss
- 9. One of the stages in a register consists of a latch.
Options- A. True
- B. False Discuss
- 10. A VHDL component is a predefined logic function.
Options- A. True
- B. False Discuss
More questions
Correct Answer: PSMUX
Correct Answer: AND gate
Correct Answer: 110100
Correct Answer: True
Correct Answer: 10,000
Correct Answer: True
Correct Answer: Hard
Correct Answer: 8086/8088
Correct Answer: True
Correct Answer: False
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