Method and apparatus for shifting data in an array of storage el

Details Method and apparatus for shifting data in an array of storage el Method and apparatus for shifting data in an array of storage el

1992-06-01

1994-11-29

Dixon, Joseph L.

Boots, shoes, and leggings

364DIG1, 3642445, G06F 1202

Patent

active

053697529

ABSTRACT:
A method and apparatus for shifting data in an array of storage elements (22-37) in a data processing system (10). In one form, the present invention uses multiplexer (MUX) logic (38) and Shift Control signals to selectively couple storage elements (22-37) to latches (39-42). In this manner, data values can be serially scanned into and out of the array for test purposes without requiring a duplicate set of latches. The MUX logic 38 couples one storage element (22-37) to each latch (39-42). Then MUX logic 38 decouples those storage elements (22-37). Next, MUX logic 38 couples an adjacent storage element (22-37) to each latch (39-42). In this manner, the storage elements (22-37) in one row and the latches (39-42) mimic the functionality of a shift register.

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