Claims
- 1. A memory system for reading and writing data through data lines, said memory system comprising:
- memory array means including a plurality of memories arranged two-dimensionally in a row and column array;
- first memory interface means comprising a row data buffer for data along rows of said memory array means and serving as a row input/output interface to said memory array means;
- second memory interface means comprising a column data buffer for data along columns of said memory array means and serving as a column input/output interface to said memory array means and being able to operate independent of said row data buffer;
- data buffer select means for selecting one of said two data buffers;
- direction control means for operating one of said two data buffers as an input interface or output interface in accordance with a reading or writing operation, respectively, on the memory contents of said memory system;
- signal invert means for inverting output signals from said memory array means to form an inverted memory array containing inverted signals; and,
- AND means provided for ANDing all bits along respective columns of the inverted memory array to obtain an ANDed bit value for each respective column of the inverted memory array.
- 2. A memory system as set forth in claim 1, wherein said memory array means includes a first plurality of input/output signal lines extending along one direction of said memory array means and a second plurality of input/output signal lines extending along another direction of said memory array means, respective ones of said first plurality of input/output signal lines being connected to respective ones of said second plurality of input/output signal lines.
- 3. A memory system as set forth in claim 1 wherein the number of bits along said rows is different from the number of bits along said columns.
Priority Claims (5)
Number |
Date |
Country |
Kind |
60-138304 |
Jun 1985 |
JPX |
|
60-138305 |
Jun 1985 |
JPX |
|
60-156707 |
Jul 1985 |
JPX |
|
60-158592 |
Jul 1985 |
JPX |
|
60-187420 |
Aug 1985 |
JPX |
|
Parent Case Info
This is a continuation of application Ser. No. 07/221,905, filed on Jul 20, 1988, which was abandoned upon the filing hereof which is a division of application Ser. No. 06/877,783, filed on Jun. 24, 1986, now abandoned.
US Referenced Citations (7)
Foreign Referenced Citations (2)
Number |
Date |
Country |
3313441 |
Oct 1984 |
DEX |
0025860 |
Feb 1980 |
JPX |
Divisions (1)
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Number |
Date |
Country |
Parent |
877783 |
Jun 1986 |
|
Continuations (1)
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Number |
Date |
Country |
Parent |
221905 |
Jul 1988 |
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