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What happens if the addressed device does not respond due to a malfunction during a read operation? What problems would this cause and what remedies
What happens if the addressed device does not respond due to a malfunction during a read operation? What problems would this cause and what remedies are possible? How is the timing diagram for an asynchronous bus affected as the distance between the processor and the I/O device increases? Consider an asynchronous bus; the bus and the interface circuitry connected to it have the following parameters: a. What is the maximum clock speed at which this bus can operate? b. How many clock cycles are needed to complete an input operation? The asynchronous bus protocol uses a full-handshake, in which the master maintains an asserted signal on master-ready until it receives slave-ready; the slave keeps slave-ready asserted until master-ready becomes inactive, and so on. Consider an alternative protocol in which each of these signals is a pulse of a fixed width of 4 ns. Devices take action only on the rising edge of the pulse. a. Draw a timing diagram for a read operation. b. Draw a timing diagram for a write operation. c. Using the same parameters as in problem #3, what is the minimum and maximum time to complete one bus transfer
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