Flip-flop circuit with controllable copying between slave and sc

Details Flip-flop circuit with controllable copying between slave and sc Flip-flop circuit with controllable copying between slave and sc

1991-11-13

1993-10-26

LaRoche, Eugene R.

Static information storage and retrieval

Systems using particular element

Flip-flop

36518905, 365189012, 3072722, 377 70, G11C 1900, H03K 3289

Patent

active

052572234

ABSTRACT:
A scannable flip-flop circuit allows data at its data input or its scan input to be stored in the flip-flop at its data output or shifted out of the flip-flop at its scan output. The flip-flop provides control circuitry for selecting the source of the input data and scan data. Data stored at the flip-flop data output may also be shifted out at the scan output. During scan operations, additional control circuitry allows data stored at the data outputs to be preserved.

REFERENCES:
patent: 4495629 (1985-01-01), Zasio et al.
patent: 4540903 (1985-09-01), Cooke et al.
patent: 4975595 (1990-12-01), Roberts et al.
patent: 5068881 (1991-11-01), Dervisoglu et al.
patent: 5130568 (1992-07-01), Miller et al.
Yashwant K. Malaiya and Ramesh Narayanaswamy, "Testing for Timing Faults in Syncronous Sequential Integrated Circuits," IEEE 1983 International Test Conference, Paper 19.3, pp. 560-571.

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