Methods and apparatus for detecting data collision of data on a data bus in case of out-of-order memory accesses or different times of memory access execution

摘要

A method of using bank tag registers in a multi-bank memory device to avoid background operation collision is described. A memory controller includes a plurality of bank registers, each of which is associated with one of a plurality of memory banks, wherein a bank register is arranged to store information, a bank number, a bank status, and a bank counter for a particular bank. The memory controller further includes an adjustable bank comparator coupled to each bank register. The memory controller receives an incoming system address request, which includes a requested bank number. The requested bank number is used to configure the adjustable bank comparator with the particular bank operating characteristics, to locate the bank register, and to determine the bank status and the bank entry status of the requested memory bank. The requested memory bank is accessed when the bank entry status identifies the requested memory bank as open.