Many microcontrollers share the same pins to output the lower address and transfer data. In order to
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Many microcontrollers share the same pins to output the lower address and transfer data. In order to hold the address constant while the data are transferred, the address information is stored in a latch which is enabled by the control signal ALE (address latch enable) as shown in Figure 5-97. Connect this latch to the microcontroller such that it takes what is on the lower address and data lines while ALE is HIGH and holds it on the lower address only lines when ALE is LOW.
Figure 5-97
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Digital Systems Principles And Application
ISBN: 9780134220130
12th Edition
Authors: Ronald Tocci, Neal Widmer, Gregory Moss
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