Semiconductor device performing error correction operation

1. A semiconductor device comprising:

a memory core including a data cell region and a parity cell region;

a parity calculation logic configured for generating a parity from data received by the parity calculation logic; and

an error correcting logic configured for outputting error-corrected data by using data that is output from the data cell region and a parity that is output from the parity cell region; and

wherein a size of a first data input to the semiconductor device by a write command to the semiconductor device or output from the semiconductor device by a read command to the semiconductor device is smaller than a size of a second data received by the parity calculation logic to generate a first parity, and

wherein the second data includes the first data and a third data read from the data cell region before generating the first parity.

2. The semiconductor device according to claim 1 , further comprising:

an internal command controller configured for receiving an external command and an external address, and configured for outputting an internal command and an internal address for controlling the memory core.

3. The semiconductor device according to claim 2 , wherein a width of data input/output to the semiconductor device is I and a width of data input to the parity calculation logic is J,

wherein I is a natural number, and

wherein J is a natural number and is larger than or equal to I.

4. The semiconductor device according to claim 3 , wherein, when a first read command and a first read address are received from outside the semiconductor device, the internal command controller generates a first internal read command for reading the first parity, I-bit data corresponding to the first read address, and bit-data (J-I) used together with the I-bit data in order to generate the first parity.

5. The semiconductor device according to claim 4 , wherein the first internal read command includes a 1-1 read command for the I-bit data, a 1-2 read command for the (J-I) bit, and a 1-3 read command for the first parity.

6. The semiconductor device according to claim 4 , wherein the error correcting logic generates error-corrected J-bit data from the I-bit data, the (J-I) bit-data, and the first parity.

7. The semiconductor device according to claim 6 , wherein the semiconductor device outputs I-bit data corresponding to the first read address, of the error-corrected J-bit data in correspondence with the first read command.

8. The semiconductor device according to claim 3 , wherein, when a first write command and a first write address are received from outside the semiconductor device, the internal command controller generates a second internal read command for reading a second parity, I-bit data corresponding to the first write address, and (J-I) bit-data used together with the I-bit data in order to generate the second parity.

9. The semiconductor device according to claim 8 , wherein the second internal read command includes a 2-1 read command for the I-bit data, a 2-2 read command for the (J-I) bit, and a 2-3 read command for reading the second parity.

10. The semiconductor device according to claim 8 , wherein the error correcting logic generates error-corrected J-bit data from the I-bit data, the (J-I) bit-data, and the second parity.

11. The semiconductor device according to claim 10 , wherein the parity calculation logic generates third parity information from I-bit data input received from outside the semiconductor device and (J-I) bit-data selected from the error-corrected J-bit data, in correspondence with the first write command.

12. The semiconductor device according to claim 11 , wherein the internal command controller further generates an internal write command that writes the I-bit data input received from outside the semiconductor device and the third parity information in the memory core.

13. The semiconductor device according to claim 2 , further comprising:

a buffer that temporarily stores data output from the error correcting logic.

14. The semiconductor device according to claim 1 ,

wherein the data cell region and the parity cell region are logically divided,

wherein the data cell region is configured to store general data, and

wherein the parity cell region is configured for storing the parity.