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The FIFO status word is used to indicate the error in
- a)keyboard mode
- b)strobed input mode
- c)keyboard and strobed input mode
- d)scanned sensor matrix mode
Correct answer is option 'C'. Can you explain this answer?
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The FIFO status word is used to indicate the error ina)keyboard modeb)...
Overrun error occurs, when an already full FIFO is attempted an entry. Underrun error occurs when an empty FIFO read is attempted.
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The FIFO status word is used to indicate the error ina)keyboard modeb)...
The FIFO status word (FSW) is used to indicate the error in the keyboard and strobed input modes.
Keyboard Mode:
In keyboard mode, the data is entered by pressing individual keys on the keyboard. The data is then stored in a First-In-First-Out (FIFO) buffer. The FSW is a status register that provides information about the state of the buffer, such as whether it is full or empty. It also indicates errors, if any, in the keyboard input.
Strobed Input Mode:
In strobed input mode, data is entered by applying a strobe signal to the device's input pin. The data is then captured and stored in the FIFO buffer. The FSW in this mode also provides information about the buffer status and any errors that may have occurred during the strobed input operation.
Keyboard and Strobed Input Mode:
The keyboard and strobed input modes can be used together, allowing data to be entered either by pressing individual keys or by applying a strobe signal. The FSW in this mode serves the same purpose as in the individual modes, providing buffer status and error information.
Scanned Sensor Matrix Mode:
The scanned sensor matrix mode is a different input mode where data is entered by scanning a matrix of sensors. This mode is not related to the FSW as it uses a different input mechanism.
Therefore, the correct answer is option C - the FIFO status word is used to indicate the error in keyboard and strobed input modes. It provides information about the buffer status and any errors that may have occurred during data entry in these modes.
Keyboard Mode:
In keyboard mode, the data is entered by pressing individual keys on the keyboard. The data is then stored in a First-In-First-Out (FIFO) buffer. The FSW is a status register that provides information about the state of the buffer, such as whether it is full or empty. It also indicates errors, if any, in the keyboard input.
Strobed Input Mode:
In strobed input mode, data is entered by applying a strobe signal to the device's input pin. The data is then captured and stored in the FIFO buffer. The FSW in this mode also provides information about the buffer status and any errors that may have occurred during the strobed input operation.
Keyboard and Strobed Input Mode:
The keyboard and strobed input modes can be used together, allowing data to be entered either by pressing individual keys or by applying a strobe signal. The FSW in this mode serves the same purpose as in the individual modes, providing buffer status and error information.
Scanned Sensor Matrix Mode:
The scanned sensor matrix mode is a different input mode where data is entered by scanning a matrix of sensors. This mode is not related to the FSW as it uses a different input mechanism.
Therefore, the correct answer is option C - the FIFO status word is used to indicate the error in keyboard and strobed input modes. It provides information about the buffer status and any errors that may have occurred during data entry in these modes.
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The FIFO status word is used to indicate the error ina)keyboard modeb)strobed input modec)keyboard and strobed input moded)scanned sensor matrix modeCorrect answer is option 'C'. Can you explain this answer?
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