翻訳と辞書
Words near each other
・ scalable coherent interface
・ scalable processor architecture
・ scalable sampling rate
・ scalable vector graphics
・ scalar
・ scallop
・ scan
・ scan design
・ scan line
・ scan path
scan register
・ scan-edf
・ scan-in, scan-out
・ scandisk
・ scanf
・ scanner
・ scanno
・ scc
・ sccs
・ sceptre


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scan register : FOLDOC
scan register
(circuit design) A digital {logic circuit} which can act either as a flip-flop or as a serial {shift register} and which is used to form a scan path.
The most common design is a multiplexed flip-flop:
___ ____
normal in --| | |
| |------|D Q|---- normal/scan output
scan in ----|___/ mux | |
| | |
test mode ----+ +----|> | flip-flop
| |____|
clk ---------------+

The addition of a
multiplexor (mux) to each flip-flop's 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.
The other common design is
level-sensitive scan design (LSSD).
(1995-02-14)

level-sensitive scan design (LSSD).
(1995-02-14)



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