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:
Apr. 11, 1995
Filed:
Jun. 06, 1994
James W Nicholes, Gilbert, AZ (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
A configurable SRAM (21) is provided that is full diffused for increased speed and density and configurable for different word widths. Configuration signals are applied to control logic (28) for selecting a word width. The word width is smaller than or equal to a bit string of configurable SRAM (21). In a write operation, data input registers store and couple a word to a second bus. A shifter (27) receives the word from the second bus and shifts the bit locations of the word. A multiplexer (26) couples the shifted word to a first bus where write circuitry of read/write circuitry (24) writes the word to a selected bit string of a memory array (22) without affecting other bits of the selected bit string. In a read operation, a selected bit string is provided from the memory array (22) to read circuitry. The read circuitry provides the selected bit string to the first bus. The multiplexer (26) couples a word from the selected bit string to the shifter (27). The shifter (27) shifts the bits of the word adjacent to one another on the second bus. Output drivers of the data input registers and output drivers (29) provide the word to other circuitry.