JPS6419578A - Memory device - Google Patents

Abstract

PURPOSE:To perform a memory read/write operation and a multi-bit shifting or multi-bit swapping operation simultaneously, by connecting each bit line in a memory to a bit input/output line on which input data from the outside the memory or output data to the outside the memory is put via a switch circuit. CONSTITUTION:When the memory write operation and the multi-bit shifting operation are performed simultaneously, a write address is supplied to a memory address line 1, and a write signifying signal line 8 is signified, and write data is supplied to an input data line, and the number of shift is supplied to a shift number indicating line 12. The write data, since the write signifying signal line 8 being signified, is sent to the bit input/output line 11 via an input/output buffer 7, and is sent to a word line in a state where a required number of bits are shifted via the switch circuit 5 turned ON by the instruction of a shift control line 14 from a shift control part 13 which decodes the number of shift, and is written on a data memory part 6 of a required word via the switch circuit 5 turned ON by the word line being signified by the instruction of an address decoder 2 which decodes the write address.