| 摘要 |
PURPOSE:To store plural data groups in a memory space without useless spaces by inserting a logical operation circuit enabled to set up arithmetic functions optionally into a data line of a semiconductor memory. CONSTITUTION:The logical operation circuit 43 for executing logical operation of data read out from the semiconductor memory 42 is formed. Respective data signals outputted from the semiconductor memory 42 and the logical operation circuit 43 are outputted to the external through a data buffer 44. A condition setting register 45 provides a condition signal to a logical operation circuit 43. The logical operation circuit 43 executes the logical operation of the condition signal and the contents of a specific address which has been already programmed. Therefore, the same address is accessed in accordance with the condition signal and different contents can be read out.
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