62352. Because microprocessor CPUs do not understand mnemonics as they are, they have to be converted to ________.
62353. A register in the microprocessor that keeps track of the answer or results of any arithmetic or logic operation is the:
62354. What is the difference between a mnemonic code and machine code?
62355. Which bus is a bidirectional bus?
62356. Which of the following buses is primarily used to carry signals that direct other ICs to find out what type of operation is being performed?
62357. What kind of computer program is used to convert mnemonic code to machine code?
62358. Which of the following are the three basic sections of a microprocessor unit?
62359. The stack is a data storage area in RAM used by certain microprocessor operations.
62360. A microprocessor with the necessary support circuits will include at least two memory ICs: ROM or EPROM, and a RAM.
62361. I/O-mapped systems identify their input and output devices by giving them an 8-bit port number.
62362. A microcontroller integrates multichip systems with RAM, ROM, and I/O.
62363. Programs written for the 8080A must have slight modifications to run on the 8085A.
62364. The software used to drive a microprocessor-based system is called FORTRAN.
62365. Conversion from assembly language to machine language can be done by the programmer through a process called hand assembly.
62366. Assembly language is written using mnemonics: MVI, DCR, JZ.
62367. The 8085 software is compatible with the 8080A.
62368. LDA addr and STA addr are Fortran language instructions stored in an external memory IC for a microprocessor.
62369. The devices that provide the means for a computer to communicate with the user or other computers are referred to as:
62370. The software used to drive microprocessor-based systems is called:
62371. The circuits in the 8085A that provide the arithmetic and logic functions are called the:
62372. How many buses are connected as part of the 8085A microprocessor?
62373. The ________ ensures that only one IC is active at a time to avoid a bus conflict caused by two ICs writing different data to the same bus.
62374. A 16-input multiplexer is to be used to perform parallel-to-serial data conversion. Which of the following counters would be required to provide the data select inputs?
62375. A breadboard-circuit design using a BCD-to-decimal decoder has a problem wherein the operation of the system is erratic. The technician uses his scope to examine the waveforms throughout the system and doesn't really see any problems. While he's scratching his head, what helpful advice can you offer him as to what might be wrong and what to do to correct the problem?
62376. How is the number one (1) indicated on the outputs of a 7447 BCD-to-seven-segment code converter?
62377. For the input values (A0–A3, B0–B3, Data Select = 1) given for the circuit given below, what will be indicated on the displays?
62378. It is suspected that the comparator in the figure given below has a problem. The inputs are activated in the table shown below and the corresponding outputs noted. What is most likely wrong with the circuit? For P0 – P3 = 1 and Q0 – Q3 = 0, P > Q = 1, P = Q = 1, P < Q = 0 For P0 – P3 = 0 and Q0 – Q3 = 1, P > Q = 0, P = Q = 1, P < Q = 1 For P0 – P3 = 1 and Q0 – Q3 = 1, P > Q = 0, P = Q = 1, P < Q = 0
62379. Which statement best describes the given figure, and what is the function of the terminal labeled EN?
62380. The data transmission system shown in below has a problem; the parity error output is always high. A logic analyzer is used to examine the system and shows that the DATA IN on the left matches the DATA OUT on right. What might be causing the problem?
62381. The IEEE/ANSI symbol for a decoder has the internal designation bcd/dec. This means the decoder is a:
62382. Multiplexing of digital signals is usually required when:
62383. Referring to the figure given below, what output code will appear on the output (A3,A2,A1,A0) when the 5 key is pressed?
62384. What type of device is shown in the given figure, and what inputs (A3,A2,A1,A0) are required to produce the output levels as shown?
62385. What are the outputs of a 7485 four-bit magnitude comparator when the inputs are A = 1001 and B = 1010?
62386. Determine the correct output for the multiplexer and its associated timing diagram given below.
62387. Which is the decimal number for the BCD number, 10110110?
62388. In an AHDL BCD to binary code converter, how is multiplication by 10 accomplished?
62389. What is the HDL key issue in the design of the MUX and DEMUX?
62390. Why are control inputs included in an HDL magnitude comparator?
62391. What VHDL techniques are used to describe a priority encoder?
62392. What is an important attribute of the conditional signal assignment statement?
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