 ... bits are stored and can be read by the software at any time, with no fear of things changing between reads. Some designers tie the register's clock input to one of the port control lines. The I/O read instruction then automatically strobes data into...  The Art of Designing Embedded Systems - Pàgina 120per Jack Ganssle - 2008 - 312 pàginesPrevisualització limitada - Sobre aquest llibre
 | Jean J. Labrosse - 2007 - 793 pàgines
...read instruction then automatically strobes data into the latch, assuming one is wise enough to ensure the register latches data on the leading edge of the...of reads. At first glance it seems perfectly safe. However, a bit of analysis shows that for asynchronous inputs it is not reliable. We're using hardware... | |
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