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The feature of mode 2 of 8255 is
- a)single 8-bit port is available
- b)both inputs and outputs are latched
- c)port C is used for generating handshake signals
- d)all of the mentioned
Correct answer is option 'D'. Can you explain this answer?
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The feature of mode 2 of 8255 isa)single 8-bit port is availableb)both...
In mode 2 of 8255, single 8-bit port is available i.e group A.
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The feature of mode 2 of 8255 isa)single 8-bit port is availableb)both...
Mode 2 of 8255 is a versatile mode that provides two 8-bit ports, Port A and Port B, and one 4-bit port, Port C. The features of mode 2 are:
Single 8-bit port is available:
- Port A and Port B can be combined to form a single 16-bit port.
- Both ports can be used as input or output ports.
Both inputs and outputs are latched:
- Latches are used to store the input and output data.
- Data is transferred between the latches and the ports.
Port C is used for generating handshake signals:
- Port C can be divided into two 4-bit ports, Port C upper (PCU) and Port C lower (PCL).
- PCU can be used to generate handshake signals such as STB (Strobe) and ACK (Acknowledge).
- PCL can be used for general purpose I/O.
All of the mentioned:
- Mode 2 provides the flexibility of using all three ports as per the requirement.
- All the features mentioned above are available in mode 2.
In conclusion, mode 2 of 8255 is a versatile mode that provides the flexibility of using two 8-bit ports and one 4-bit port with latched inputs and outputs. Port C can be used for generating handshake signals, and all the features mentioned above are available in mode 2.
Single 8-bit port is available:
- Port A and Port B can be combined to form a single 16-bit port.
- Both ports can be used as input or output ports.
Both inputs and outputs are latched:
- Latches are used to store the input and output data.
- Data is transferred between the latches and the ports.
Port C is used for generating handshake signals:
- Port C can be divided into two 4-bit ports, Port C upper (PCU) and Port C lower (PCL).
- PCU can be used to generate handshake signals such as STB (Strobe) and ACK (Acknowledge).
- PCL can be used for general purpose I/O.
All of the mentioned:
- Mode 2 provides the flexibility of using all three ports as per the requirement.
- All the features mentioned above are available in mode 2.
In conclusion, mode 2 of 8255 is a versatile mode that provides the flexibility of using two 8-bit ports and one 4-bit port with latched inputs and outputs. Port C can be used for generating handshake signals, and all the features mentioned above are available in mode 2.
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The feature of mode 2 of 8255 isa)single 8-bit port is availableb)both inputs and outputs are latchedc)port C is used for generating handshake signalsd)all of the mentionedCorrect answer is option 'D'. Can you explain this answer?
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