Patent ID: 6990039

Claim:
A semiconductor storing device in which a row of memory cells is selected by a word line stage and a division word line stage, comprising: memory arrays that each include a plurality of memory cells arranged in a matrix; word lines for respective rows of the memory cells; division word lines each of which is connected to the memory cells arranged in one row corresponding to one word; division word line selectors that select the division word lines, respectively, the division word lines being connected to the respective word lines via the division word line selectors, respectively; pairs of bit lines for reading data from the memory cells and writing data to the memory cells that are connected to the pairs of the bit lines, respectively; column gates connected to the pairs of bit lines, respectively; pairs of data lines that are connected to the pairs of bit lines via the column gates, respectively, to communicate data; write buffers for data writing that are connected to the pairs of data lines, respectively; sense operational amplifiers for data reading that are connected to the pairs of data lines, respectively; and data input/output circuits that are connected to the pairs of data lines via the write buffers and the sense operational amplifiers, respectively, wherein input address data is specified by address data X[i:0], Y[j:0], and Z[k:0], two roots of selection signals for selecting the division word line selectors are provided alternately to the division word lines arranged in one of the memory arrays, and one of the two roots of the selection signals is enabled to select one of the division word line selectors in the one of the memory arrays, and eight roots of the selection signals in the entire semiconductor storing device are enabled so that when an address (z, y, x) is specified by the input address data X[i:0], Y[j:0], and Z[k:0], eight addresses of (z, y, x), (z, y, x+1), (z, y+1, x), (z, y+1, x+1), (z+1, y, x), (z+1, y, x+1), (z+1, y+1, x), and (z+1, y+1, x+1) are accessed simultaneously.