Until 2.7.1.3

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Questions and Answers

Which type of IC allows a signal to pass through without altering its logic value?

Buffers

What is the main function of a latch?

To hold a signal at a particular logic level until a change is requested

What is the difference between one-in one-out buffers and tri-state buffers?

Tri-state buffers have an additional control signal while one-in one-out buffers do not

What is the function of basic input ports?

To connect to a data bus line Signup and view all the answers

Which type of IC is mainly made up of D-type flip-flops?

Latches Signup and view all the answers

What is the function of basic output ports?

To hold data until the device is ready to read it Signup and view all the answers

What is the purpose of using 16 bit addressing for I/O in Intel architecture?

To reduce hardware decoding requirements Signup and view all the answers

Which type of buffer is useful in circuits that only allow the passage of signals when a particular state is active?

Tri-state buffers Signup and view all the answers

What is the function of TTL ICs?

To increase the DC drive characteristics of a signal Signup and view all the answers

Which type of IC isolates the microprocessor from any outside signals and prevents damage to it from changes in voltage along signal lines?

Buffers Signup and view all the answers

What is the difference between level-triggered and edge-triggered latches?

Level-triggered latches hold a signal until another strobed signal is applied or power is removed while edge-triggered latches hold a signal at a particular logic level until a change is requested Signup and view all the answers

What is the function of plug-in cards in interfacing circuitry?

To provide more ports for interfacing with external devices Signup and view all the answers

Which type of IC allows a signal to pass through without altering its logic value?

Buffers Signup and view all the answers

What is the main function of a latch?

To hold a signal at a particular logic level until a change is requested Signup and view all the answers

What is the difference between one-in one-out buffers and tri-state buffers?

Tri-state buffers have an additional control signal while one-in one-out buffers do not Signup and view all the answers

What is the function of basic input ports?

To connect to a data bus line Signup and view all the answers

Which type of IC is mainly made up of D-type flip-flops?

Latches Signup and view all the answers

What is the function of basic output ports?

To hold data until the device is ready to read it Signup and view all the answers

What is the purpose of using 16 bit addressing for I/O in Intel architecture?

To reduce hardware decoding requirements Signup and view all the answers

Which type of buffer is useful in circuits that only allow the passage of signals when a particular state is active?

Tri-state buffers Signup and view all the answers

What is the function of TTL ICs?

To increase the DC drive characteristics of a signal Signup and view all the answers

Which type of IC isolates the microprocessor from any outside signals and prevents damage to it from changes in voltage along signal lines?

Buffers Signup and view all the answers

What is the difference between level-triggered and edge-triggered latches?

What is the function of plug-in cards in interfacing circuitry?

To provide more ports for interfacing with external devices Signup and view all the answers

Which type of ICs allow a signal to pass through without altering the logic value of the signal?

Buffers Signup and view all the answers

What is the main purpose of buffers in a circuit?

To allow a signal to pass through without altering its logic value Signup and view all the answers

What is the difference between one-in one-out buffers and Tri-state buffers?

Tri-state buffers have an additional control signal and turn output into a high-impedance state when de-activated Signup and view all the answers

Which type of latches hold a signal at a particular logic level until a change is requested?

D-type flip-flops Signup and view all the answers

What is the main difference between level-triggered and edge-triggered latches?

Edge-triggered latches are used to avoid ambiguity Signup and view all the answers

What are basic input ports connected to?

Data bus line Signup and view all the answers

What are basic output ports made up of?

Latches Signup and view all the answers

What is the purpose of plug-in cards in a circuit?

To provide more ports for interfacing with external devices Signup and view all the answers

Do ports that interface with slower devices than the main processor have issues with slower data transfer?

No, they do not have issues with slower data transfer Signup and view all the answers

How many address pins are used in Intel architecture for I/O?

10 Signup and view all the answers

What is the purpose of tri-state buffers in a circuit?

To allow control over the direction of data flow Signup and view all the answers

What is the purpose of latches in a circuit?

To hold a signal until another strobed signal is applied or power is removed Signup and view all the answers

Study Notes

I/O Devices and Basic Hardware for Interfacing Circuitry

Plug-in cards are commonly used to provide more ports for interfacing with external devices.
Ports that interface with slower devices than the main processor do not have issues with slower data transfer.
Intel architecture uses 16 bit addressing for I/O, but only 10 address pins are used to reduce hardware decoding requirements.
Buffers are TTL ICs that allow a signal to pass through without altering the logic value of the signal, increasing the DC drive characteristics of the signal.
Buffers isolate the microprocessor from any outside signals and prevent damage to it from changes in voltage along signal lines.
Two types of buffers exist: one-in one-out buffers and Tri-state buffers that have an additional control signal and turn output into a high-impedance state when de-activated.
Tri-state buffers are useful in circuits that only allow the passage of signals when a particular state is active, while bi-directional buffers allow control over the direction of data flow.
Latches are mainly made up of D-type flip-flops that hold a signal until another strobed signal is applied or power is removed.
Latches hold a signal at a particular logic level until a change is requested, making them preferred over buffers in situations where the receiving end requires more time to process the signal.
Latches can be level-triggered or edge-triggered, with edge-triggered latches used to avoid ambiguity.
Basic input ports are tri-state buffers connected to a data bus line, with the control signal usually a combination of _IORD and the selected port address obtained using address decoding.
Basic output ports are latches that hold data until the device is ready to read it, with the control signal usually a combination of _IOW and the selected port address obtained using address decoding.

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Until 2.7.1.3

Questions and Answers

Which type of IC allows a signal to pass through without altering its logic value?

What is the main function of a latch?

What is the difference between one-in one-out buffers and tri-state buffers?

What is the function of basic input ports?

Which type of IC is mainly made up of D-type flip-flops?

What is the function of basic output ports?

What is the purpose of using 16 bit addressing for I/O in Intel architecture?

Which type of buffer is useful in circuits that only allow the passage of signals when a particular state is active?

What is the function of TTL ICs?

Which type of IC isolates the microprocessor from any outside signals and prevents damage to it from changes in voltage along signal lines?

What is the difference between level-triggered and edge-triggered latches?

What is the function of plug-in cards in interfacing circuitry?

Which type of IC allows a signal to pass through without altering its logic value?

What is the main function of a latch?

What is the difference between one-in one-out buffers and tri-state buffers?

What is the function of basic input ports?

Which type of IC is mainly made up of D-type flip-flops?

What is the function of basic output ports?

What is the purpose of using 16 bit addressing for I/O in Intel architecture?

Which type of buffer is useful in circuits that only allow the passage of signals when a particular state is active?

What is the function of TTL ICs?

Which type of IC isolates the microprocessor from any outside signals and prevents damage to it from changes in voltage along signal lines?

What is the difference between level-triggered and edge-triggered latches?

What is the function of plug-in cards in interfacing circuitry?

Which type of ICs allow a signal to pass through without altering the logic value of the signal?

What is the main purpose of buffers in a circuit?

What is the difference between one-in one-out buffers and Tri-state buffers?

Which type of latches hold a signal at a particular logic level until a change is requested?

What is the main difference between level-triggered and edge-triggered latches?

What are basic input ports connected to?

What are basic output ports made up of?

What is the purpose of plug-in cards in a circuit?

Do ports that interface with slower devices than the main processor have issues with slower data transfer?

How many address pins are used in Intel architecture for I/O?

What is the purpose of tri-state buffers in a circuit?

What is the purpose of latches in a circuit?

Study Notes

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