Suppose you want to test the interfacing IC 82C55, so you connected it with a microprocessor...

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Suppose you want to test the interfacing IC 82C55, so you connected it with a microprocessor and some peripheral devices and used the following control words to configure the IC: 11110000 a) Explain the mechanism of how port A determines if it will work as input or output port for the above scenario. b) Explain the step by step that takes place when the microprocessor sends data to the device connected to port A for the above configuration mentioning the signal values and pin numbers. Illustrate the necessary timing diagram to visualize the process. c) In the above scenario, the processor wants to send the data '00001111' to the device connected to port B. Write the steps that would take place to complete the process mentioning the necessary pin values. Suppose you want to test the interfacing IC 82C55, so you connected it with a microprocessor and some peripheral devices and used the following control words to configure the IC: 11110000 a) Explain the mechanism of how port A determines if it will work as input or output port for the above scenario. b) Explain the step by step that takes place when the microprocessor sends data to the device connected to port A for the above configuration mentioning the signal values and pin numbers. Illustrate the necessary timing diagram to visualize the process. c) In the above scenario, the processor wants to send the data '00001111' to the device connected to port B. Write the steps that would take place to complete the process mentioning the necessary pin values.

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The IC 82C55 is a programmable parallel IO device commonly used to interface microprocessors with external devices In the given scenario the control w... View the full answer