APPARATUS AND METHOD FOR MANAGING A DRAM BUFFER
An apparatus and method for managing a dynamic random access memory (DRAM) buffer are disclosed. The DRAM buffer managing apparatus and method may generate an error correction code (ECC) for data to be written in a DRAM buffer, and may write the data and the ECC in the DRAM buffer.
1 . An apparatus for managing a dynamic random access memory (DRAM) buffer, the apparatus comprising:
an error correction code (ECC) generator to generate an ECC for data to be written in a DRAM buffer; and
a writer to write the data and the ECC in the DRAM buffer.
2 . The apparatus of claim 1 , further comprising:
a reader to read the data and the ECC from the DRAM buffer;
a determiner to determine whether an error occurs in the read data, based on the read ECC; and
an error corrector to correct the error when an error occurs in the read data.
3 . The apparatus of claim 1 , further comprising:
a table storage unit to store an address mapping table in which successive pages, among at least one page constituting the DRAM buffer, are respectively mapped to different banks.
4 . The apparatus of claim 3 , wherein, when a sum of a size of the data and a size of the ECC exceeds a size of a first page in which the data and the ECC are to be written, the writer opens a row included in a second page following the first page by referring to the address mapping table, and writes data corresponding to the excess of the size of the first page, among the data and the ECC, in the second page.
5 . The apparatus of claim 1 , wherein
the ECC generator generates in real time the ECC at every burst (unit) when the data is transmitted to the DRAM buffer in burst units, and
the writer successively transmits the data and the ECC to the DRAM buffer at every burst unit.
6 . A method of managing a dynamic random access memory (DRAM) buffer, the method comprising:
generating an error correction code (ECC) for data to be written in a DRAM buffer; and
writing the data and the ECC in the DRAM buffer.
7 . The method of claim 6 , further comprising:
reading the data and the ECC from the DRAM buffer;
determining whether an error occurs in the read data, based on the read ECC; and
correcting the error when an error occurs in the read data.
8 . The method of claim 6 , wherein
the writing comprises:
determining whether a sum of a size of the data and a size of the ECC exceeds a size of a first page in which the data and the ECC are to be written; and
opening a row included in a second page following the first page by referring to an address mapping table, and writing data corresponding to the excess of the size of the first page, among the data and the ECC, in the second page when the sum of the size of the data and the size of the ECC exceeds the size of the first page, and
the address mapping table corresponds to a table in which successive pages, among at least one page constituting the DRAM buffer, are respectively mapped to different banks.
9 . A computer-readable recording medium storing a program to implement the method of claim 6 .
10 . A computer-readable recording medium storing a program to implement the method of claim 7 .
11 . A computer-readable recording medium storing a program to implement the method of claim 8 .