| 摘要 |
PURPOSE:To enable to use either one of the parity inspection mechanism provided at the memory or SEC-DED mechanism, by providing SEC-DED means, and the selective output means of either the output or data output. CONSTITUTION:The parity inspection circuit 3 making parity check for the data transmitted to be stored in the memory, data memory section 2, and one bit error correction - 2-bit error detection (SEC-DED) means 1, are provided. Further, the output from the SEC-DED means 1 and the data output read out from the data memory means 2 are input and either one of them is selectively output to the data switching circuit 5. Further, a selective control signal is fed to the switching circuit 5, then either one of the said inputs can selectively be output. |
