Invention Grant
- Patent Title: Power control over memory cell arrays
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Application No.: US15150115Application Date: 2016-05-09
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Publication No.: US09666266B1Publication Date: 2017-05-30
- Inventor: Hongbin Ji , Ephrem C. Wu , Thomas H. Strader
- Applicant: Xilinx, Inc.
- Applicant Address: US CA San Jose
- Assignee: XILINX, INC.
- Current Assignee: XILINX, INC.
- Current Assignee Address: US CA San Jose
- Agent LeRoy D. Maunu
- Main IPC: G11C11/418
- IPC: G11C11/418

Abstract:
In disclosed circuit arrangements, memory cell arrays are addressed by a first portion of an input address, and memory cells within each memory cell array are addressed by a second portion of the input address. A first first-in-first-out (FIFO) buffer is coupled to the memory cell arrays and delays the second portion of each input address to the memory cell arrays for a sleep period. Control circuits respectively coupled to the memory cell arrays include second FIFO buffers and decode the first portion of each input address and generate corresponding states of enable signals. The control circuits store the corresponding states of the enable signals in the second FIFO buffers concurrently with input of the second portion of each input address to the first FIFO buffer. The second FIFO buffers delay output of the corresponding states of the enable signals to the memory cell arrays for the sleep period. Each control circuit further switches a corresponding memory cell array into a sleep mode in response to all states of the enable signal in the corresponding second FIFO buffer being in a non-enabled state.
Information query
IPC分类: