Memory system with ECC-unit and further processing arrangement
A memory system including a first memory for storing data and an ECC unit for accessing the first memory and for detecting errors in data retrieved from the first memory, and characterised by an error further processing arrangement operable to process errors detected by the ECC unit, the error further processing arrangement including a second memory for recording information relating to the detected errors. Also described is a method of operation in the memory system.
1. A memory system comprising:
a first memory for storing data;
an ECC (error correction code) unit for detecting errors in data retrieved from the first memory and for producing corrected values for some of the data retrieved from the first memory;
an error further processing arrangement to process the errors in data detected by the ECC unit, the error further processing arrangement including:
a second memory for recording data relating to the errors, wherein data relating to an error detected by the ECC unit is to comprise an address in the first memory of data, wherein retrieval of the data generated the error detected by the ECC, together with information enabling the error to be corrected, the information is based upon a corrected value produced by the ECC unit, and the information is recorded in response to the detection of the error by the ECC unit; and
a table lookup unit connected to the ECC unit and the second memory, wherein the ECC unit is to transmit to the table lookup unit addresses of the errors detected by the ECC unit and the table lookup unit is to access the second memory based upon the transmitted addresses.
2. A memory system according to claim 1 , wherein the error further processing arrangement includes error processing logic operable to record statistical data relating to the errors detected by the ECC unit.
3. A memory system according to claim 2 , wherein the error further processing arrangement includes a register interface operable to configure storage of statistical data by the error processing logic, wherein the register interface is further operable to retrieve and provide statistical data recorded by the error processing logic to a data application outside the memory system.
4. A memory system according to claim 1 wherein the memory system is in the form of a semiconductor integrated circuit chip optionally including one or more other devices or systems.
5. A method performed by a memory system, the memory system comprising a first memory, an ECC (error correction code) unit, an error further processing arrangement, and a table lookup unit, the method comprising:
storing data in the first memory;
detecting by the ECC unit errors in data retrieved from the first memory;
producing by the ECC unit corrected values for some of the data retrieved from the first memory;
processing by the error further processing arrangement the errors in data detected by the ECC unit, the error further processing arrangement including a second memory, the processing including:
recording in the second memory data relating to the errors, wherein data relating to an error detected by the ECC unit comprises an address in the first memory of data, wherein retrieval of the data generated the error detected by the ECC, together with information enabling the error to be corrected, the information is based upon a corrected value produced by the ECC unit, and the information is recorded in response to the detection of the error by the ECC unit;
transmitting by the ECC unit to the table lookup unit addresses of the errors detected by the ECC unit, wherein the table lookup unit is connected to the ECC unit and the second memory; and
accessing by the table lookup unit the second memory based upon the transmitted addresses.
6. The method of claim 5 , wherein:
the error further processing arrangement includes error processing logic; and
the method further comprises the error processing logic recording statistical data relating to the errors detected by the ECC unit.
7. The method of claim 6 , wherein:
the error further processing arrangement includes a register interface;
the method further comprises the register interface configuring storage of the statistical data by the error processing logic; and
the method further comprises the register interface providing statistical data recorded by the error processing logic to a data application outside the memory system.
8. The method of claim 5 wherein the memory system is in the form of a semiconductor integrated circuit chip optionally including one or more other devices or systems.
9. A non-transitory computer readable medium comprising a set of instructions to manipulate a memory system, the memory system comprising a first memory, an ECC (error correction code) unit, an error further processing arrangement, and a table lookup unit, the set of instructions to:
store data in the first memory;
detect by the ECC unit errors in data retrieved from the first memory;
produce by the ECC unit corrected values for some of the data retrieved from the first memory;
process by the error further processing arrangement the errors in data detected by the ECC unit, the error further processing arrangement including a second memory, wherein the instructions to process include instructions to:
record in the second memory data relating to the errors, wherein data relating to an error detected by the ECC unit comprises an address in the first memory of data, wherein retrieval of the data generated the error detected by the ECC, together with information enabling the error to be corrected, the information is based upon a corrected value produced by the ECC unit, and the information is recorded in response to the detection of the error by the ECC unit;
transmit by the ECC unit to the table lookup unit addresses of the errors detected by the ECC unit, wherein the table lookup unit connected to the ECC unit and the second memory; and
access by the table lookup unit the second memory based upon the transmitted addresses.
10. The computer readable medium of claim 9 , wherein:
the error further processing arrangement includes error processing logic; and
the instructions comprise instructions to record by the error processing logic statistical data relating to the errors detected by the ECC unit.
11. The computer readable medium of claim 10 , wherein:
the error further processing arrangement includes a register interface;
the instructions comprise instructions to configure, by the register interface, storage of the statistical data by the error processing logic; and
the instructions comprise instructions to provide by the register interface statistical data recorded by the error processing logic to a data application outside the memory system.
12. The computer readable medium of claim 9 wherein the memory system is in the form of a semiconductor integrated circuit chip optionally including one or more other devices or systems.