The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 05, 2001
Filed:
Mar. 08, 1999
Hsinshih Wang, Fremont, CA (US);
Chameleon Systems, Inc., San Jose, CA (US);
Abstract
An apparatus and method of performing random bit swapping including bit (single bit) swapping, nibble (4-bit) swapping, byte (8-bit) swapping, and half word (16-bit) swapping including a matrix of rows of two-to-one multiplexers. Each row of multiplexers shares the same control signal such that all of the multiplexer in a given row either outputs a “non-swapped” bit value or a “swapped” bit value. In addition, multiplexers are grouped within rows to allow 2-bit, 4-bit, 8-bit, and n-bit swaps in each consecutive row. Depending on the shared multiplexer controls for each row, the matrix can be programmed to perform any swapping function or possible bit pattern. The number of bits output by the matrix determines the number of rows used, e.g., an 8-bit dataword uses 3 rows, 16-bit word uses 4 rows, 2,-bit word uses N rows.