Memory device having common data lines for reading and writing
First Claim
1. A semiconductor memory device comprising:
- a memory cell array having plural memory cells disposed in an array;
selecting means for selecting a plurality of memory cells from among said plural memory cells of said memory cell array;
a plurality of data lines coupled to said selecting means, each of said plurality of data lines for transmitting write data to and read data from said memory cell array;
a read data latch means, having a plurality of latch circuits respectively coupled to said plurality of data lines, for temporarily storing data therein; and
,a write data latch means, having a plurality of buffer circuits respectively coupled to said plurality of data lines, for temporarily storing data therein;
wherein, upon carrying out a write operation for writing of the write data into said memory cell array, the write data is stored in both said read data latch means and said write data latch means at the same time.
2 Assignments
0 Petitions
Accused Products
Abstract
A semiconductor memory device includes a memory cell array having plural memory cells disposed in an array. A sense amplifier is provided for selecting a plurality of memory cells from among the plural memory cells of the memory cell array. Data lines are provided coupled to the sense amplifier. Each of the data lines is for transmitting write data to and read data from the memory cell array. A read data latch circuit is provided having a plurality of latch circuits respectively coupled to the data lines. Additionally, a write data latch circuit is provided having a plurality of buffer circuits respectively coupled to the data lines. Thus, a common transmitting path is provided for both inputting data and outputting data from the memory cell array. Upon carrying out a write operation for writing of the write data into the memory cell array, the write data is stored in both the read data latch circuit and the write data latch circuit at the same time.
32 Citations
20 Claims
-
1. A semiconductor memory device comprising:
-
a memory cell array having plural memory cells disposed in an array; selecting means for selecting a plurality of memory cells from among said plural memory cells of said memory cell array; a plurality of data lines coupled to said selecting means, each of said plurality of data lines for transmitting write data to and read data from said memory cell array; a read data latch means, having a plurality of latch circuits respectively coupled to said plurality of data lines, for temporarily storing data therein; and
,a write data latch means, having a plurality of buffer circuits respectively coupled to said plurality of data lines, for temporarily storing data therein; wherein, upon carrying out a write operation for writing of the write data into said memory cell array, the write data is stored in both said read data latch means and said write data latch means at the same time. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
-
Specification