Input handshaking signals

1.	Input handshaking signals
Answer» Input Handshaking signals 1. IBF(Input Buffer Full)-It is an output indicating that the input latch contains information. 2. STB(Strobed Input)-The strobe input loads data into the port latch, which holds the information until it is input to the microprocessor via the IN instruction. 3. INTR(Interrupt request)-It is an output that requests an interrupt. The INTR pin becomes a logic 1 when the STB input returns to a logic 1, and is cleared when the data are input from the port by the microprocessor. 4. INTE(Interrupt enable)-It is neither an input nor an output; it is an internal bit programmed via the port PC4(port A) or PC2(port B) bit position.

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Input Handshaking signals

1. IBF(Input Buffer Full)-It is an output indicating that the input latch contains information.

2. STB(Strobed Input)-The strobe input loads data into the port latch, which holds the information until it is input to the microprocessor via the IN instruction.

3. INTR(Interrupt request)-It is an output that requests an interrupt. The INTR pin becomes a logic 1 when the STB input returns to a logic 1, and is cleared when the data are input from the port by the microprocessor.

4. INTE(Interrupt enable)-It is neither an input nor an output; it is an internal bit programmed via the port PC4(port A) or PC2(port B) bit position.

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