Digital Theory & Microprocessors Flashcards
A conducting logic circuit is considered to be:
True
A modulo 10 counter is known as:
A decade counter
The 8/4/2/1 designation is used to define the base for which system?
The Binary-Coded-Decimal system
A non-conducting logic circuit is considered to be:
False
Convert 15( base 10) to octal.
17(base 8)
Convert ABC (base 16) to binary.
1010 1011 1100
Convert 0100 1000(BCD) to decimal.
48
Convert 576(base 10) to BCD.
0101 0111 0110
How many inputs are associated with a J-K flip-flop?
5
How many R-S flip-flops would be required to store an eight digit binary number?
8
In order to provide a 1 logic state in a TTL circuit, what voltage is required to be present?
2.4 - 5.0 v
To achieve the fastest computing speed from adders how should they be installed?
In parallel
Two logic gates ( an AND gate and a NOT gate respectively) are connected in series. What is the resultant single logic gate equivalent.
NAND
What is the purpose of a capacitor installed to ground in a TTL circuit?
Channel/shunt power spikes to ground.
What is the radix of the binary numbering system?
2
What is the radix of the decimal numbering system?
10
What logic gate has one input and always produces the opposite of the input at the output .
NOT
What reference can be used which provides a list of input combinations and their corresponding outputs that characterizes a digital devices function?
Truth Table
Which digit is the LSD in the number 1876.0?
6
Which digit is the MSD of the number 1876.0?
1
Which logic gate has two inputs (A and B) and one output whose Boolean value is “A + B.”
OR
Which logic gate provides a 1 output only if all the inputs are logic 1?
AND
Which of the following is a base 8 system?
Octal
Which two-input logic gate produces a 1 when either input is a one but not both.
XOR
Which type of adder adds two binary numbers and produces no carry?
Quarter adder
What is the “D” Flip-Flop’s operational condition/state when the “CLK” input transitions to “High”, the “D” input is a “1”, and the “Q” output is a “1”?
Store “1”
What is the “D” Flip-Flop’s operational condition/state when the “CLK” input transitions to “High”, the “D” input is a “0”, and the “Q” output is a “0”?
Store “0”
What is the “D” Flip-Flop’s operational condition/state when the “CLK” input is “0”, the “D” input is a “1”, and the “Q” output is a “0”?
Start
What is the operational condition/state of an “R-S Flip-Flop” if the “R” input is “1”, the “S” input is “1”, and both the “Q” & “Not-Q” outputs are in their previous condition?
Latched
What is the operational condition/state of an “R-S Flip-Flop” if the “R” input is “0”, the “S” input is “1”, and the “Q” output is “1” & the “Not-Q” output is “0”?
Set
What is the operational condition/state of an “R-S Flip-Flop” if the “R” input is “1”, the “S” input is “0”, and the “Q” output is “0” & the “Not-Q” output is “1”?
Reset
What is the operational condition/state of an “R-S Flip-Flop” if the “R” input is “1”, the “S” input is “1”, and the “Q” output is “1” & the “Not-Q” output is “1”?
Jammed
What is the operational condition/state of an “J-K Flip-Flop” if the “J” input is “0”, the “K” input is “0”, and the “CLK” input is “1”, the “Q” output is “Q” & the “Not-Q” output is “Not Q “?
No Change
What is the operational condition/state of an “J-K Flip-Flop” if the “J” input is “1”, the “K” input is “0”, and the “CLK” input is “1”, the “Q” output is “1” & the “Not-Q” output is “0”?
Set
What is the operational condition/state of an “J-K Flip-Flop” if the “J” input is “0”, the “K” input is “1”, and the “CLK” input is “1”, the “Q” output is “0” & the “Not-Q” output is “1”?
Reset
What is the operational condition/state of an “J-K Flip-Flop” if the “J” input is “1”, the “K” input is “1”, and the “CLK” input is “1”, the “Q” output is “1” & the “Not-Q” output is “1”?
Toggle
What condition or state is an R-S Flip-Flop in when both “Q” and “Not-Q” outputs are high (logic 1)?
Jammed
What condition or state is a J-K Flip-Flop in when the”J” input is 1, the “K” input is 1, and the “CLK” (Clock) input is 1?
Toggle
What condition or state is an R-S Flip-Flop in when the “R” input is 0, the “S” input is 1, the “Q” output is 1, and the “Not-Q” output is 0?
Set
What is another name for an Astable Multivibrator?
Free-Running Multivibrator
What is another name for a Bi-stable Multivibrator?
Flip-Flop and Frequency Divider
What is another name for a Mono-stable Multivibrator?
Single-shot or One-shot Multivibrator
If the input frequency of a Bi-stable Multivibrator is 2.25 MHz, what is the output frequency?
1.125 MHz
A program contains 1,600 bits of information. How many Bytes does it contain?
200
What is the function of the program counter?
Keeps track of the sequence of instructions to be executed.
Four (4) bits is known as what?
A Nibble
What is used to locate data in memory?
Address
Inside a dynamic RAM chip, what component acts as a switch?
Transistor
The set of microprocessor software commands that allow a programmer to control the functions of the microprocessor is known as what?
Instruction Set
How many basic sets of instructions are normally associated with a microprocessor?
9
Two (2) nibbles equals:
A Byte
Which section/component of a computer keeps track of the address of the instruction fetched from memory?
Program Counter
Which type of memory must be refreshed periodically?
Dynamic RAM
What section/component of a computer determines the word size for a microprocessor?
Accumulator
How many basic parts constitute a microprocessor?
4
If the memory word in a microprocessor is 64 bits wide, the accumulator must be __________ bits wide.
64
What section is a set of logic circuitry which is basically an adder?
ALU
Which register determines the maximum word size for the microprocessor?
Accumulator
A signal from an external device requesting service in the form of receiving or transmitting data is known as what?
An interrupt (IRQ)
What computer section decodes instructions that enter the computer?
Control Unit
Inside a dynamic RAM chip, what component holds the bit information?
Capacitor
Which register retains a computer’s binary data?
Memory Register
Which register determines the maximum memory size of the computer?
Memory Register
How do you determine Chip Density?
Multiply chip depth by chip width.
What term is used to indicate the smallest possible unit of digital information?
Bit
Which section of the computer performs math logic and decision making operations?
ALU
Which section/ component of the computer temporarily stores results of computations?
RAM
The component/section of a computer that decodes the instruction(s) gathered from the data register is called what?
Instruction Decoder
How many basic blocks or sections make up all digital computers?
5
Inside a static RAM chip, what component holds the bit information?
Flip-Flop
A program contains 800 bits of information. How many Bytes does this equal?
100 Bytes
When you logically “AND” the numbers [0010 1110 1100] with [1111 0110 0100] the result is:
0010 0110 0100
When you logically “OR” the numbers [0010 1110 1100] with [1111 0110 0100] the result is:
1111 1110 1100
The simplest way to _______________ a number by four (4) is to use the Move/Shift command, moving the bits left two (2) times.
Multiply
The simplest way to _______________ a number by four (4) is to use the Move/Shift command, moving the bits right two (2) times.
Divide
To add two numbers together inside the microprocessor, use the _______________ command from the instruction set.
Add
To increment the program counter by one, use the _________________ command from the instruction set.
Increment
