Computing (FOLDOC) dictionary
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The most common design is a multiplexed
flip-flop:
___ ____
normal in --| | |
| |------|D Q|---- normal/scan output
scan in ----|___/ mux | |
| | |
test mode ----+ +----|@# | flip-flop
| |____|
clk ---------------+
input allows operation in either normal or test mode. The
output of each flip-flop goes to the normal functional logic
as well as to the scan input of the next multiplexor in the
scan path.
(LSSD).
(1995-02-14)