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Semiconductor memory device for inputting and outputting data in a unit of bits

  • US 5,535,163 A
  • Filed: 11/01/1994
  • Issued: 07/09/1996
  • Est. Priority Date: 11/01/1993
  • Status: Expired due to Fees
First Claim
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1. A multibit memory device comprising:

  • a memory cell array composed of mixed memory cells corresponding to different IO bits;

    a plurality of data input/output terminals corresponding respectively to IO bits, for inputting and outputting data in a parallel fashion to and from said memory cell array, said data input/output terminals being classified into a first data input/output terminal and a second data input/output terminal;

    an address terminal for inputting an address;

    internal data buses associated respectively with the IO bits and connected to said memory cell array;

    test mode entry signal generating means for generating a test mode entry signal indicative of entry into a test mode;

    pseudo-address generating means connected to said address terminal, for generating a pseudo-address in said test mode; and

    connecting means responsive to said test mode entry signal for selecting one of said internal data buses depending on said pseudo-address and connecting the selected one of the internal data buses to said first data input/output terminal in said test mode.

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