|5991-2662EN Logic Analysis Fundamentals - Application Note c20140929 .pdf||Keysight Technologies
Logic Analysis Fundamentals
Today, a wide range of end products, such as mobile devices, radar systems, and industrial controls are found with a combination of
serial and parallel bus structures. Internal FPGA signals are almost exclusively parallel bus in nature. This application note exam-
ines the basics of parallel bus measurements, including functional and timing verification and debug and tracing system crashes in
search of a root cause.
Synchronous versus asynchronous capture in logic analyzers
Before looking at specific measurement examples, it is helpful to consider the difference between synchronous and asynchronous
capture and the benefits and limitations of each.
Synchronous (state) capture means that the measurement system in the logic analyzer determines the logic value of digital parallel
buses or control lines when there is an associated valid clock, such as a rising edge on a system|