Patent Number: 6,401,180

Title: Bank history table for improved pre-charge scheduling of random access memory banks

Abstract: A bank history table and precharge decision logic allows a memory controller to dynamically choose either to precharge a memory bank immediately after an access or to delay precharge based on the assumption that a subsequent access will be to the same row of the bank. The bank history table has a plurality of memory access history vectors. Each of the memory access history vectors corresponds to a respective one of a plurality of banks of memory. A precharge decision circuit is coupled to the bank history table and receives a selected one of the memory access history vectors and a new history bit. The precharge decision circuit makes a precharge prediction for the memory using the selected access history vector and the new history bit.

Inventors: Hartmann; Alfred C. (Round Rock, TX)

Assignee: Advanced Micro Devices, Inc.

International Classification: G11C 7/12 (20060101); G11C 8/12 (20060101); G11C 7/00 (20060101); G11C 8/00 (20060101); G11C 11/409 (20060101); G11C 11/4094 (20060101); G06F 012/00 ()

Expiration Date: 06/04/2019