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US 7,453,760 B2Granted
Method for accessing dual-port memory
AssigneeInstitute of Nuclear Energy Atomic Energy Council
InventorChung-Lin Lee
Life of this patent
Estimating the term…
Abstract
A method for accessing a dual-port memory, wherein a data block programming procedure is performed upon the dual-port memory using status flags and check codes to determine the access sequence of the data so as to enable data exchange between two central processing units (CPU's) to be processed rapidly and correctly without interruption and thus to enhance the performance of the two CPU's.
Claims11
A method for accessing a dual-port memory connecting a first central processing unit and a second central processing unit for reading/writing data, the method comprising steps of:
- (a) performing a data writing process, comprising steps of:
- determining a data block for the first central processing unit to write a first variable data in according to a first status flag;
- writing the first variable data in the first data block and resetting the first status flag to indicate a second data block is busy by the first central processing unit if the first status flag indicates the first data block is busy;
- and
- writing the first variable data in the second data block and resetting the first status flag to indicate the first data block is busy by the first central processing unit if the first status flag indicates the second data block is busy;
- and
- (b) performing a data reading process, comprising steps of:
- determining a data block for the second central processing unit to read the first variable data from according to the first status flag;
- reading the first variable data from the second data block by the second central processing unit if the first status flag indicates the first data block is busy;
- and
- reading the first variable data from the first data block by the second central processing unit if the first status flag indicates the second data block is busy.
8 more elements
Dependencies are inferred from the claim text.