Semiconductor memory apparatus and test circuit therefor
First Claim
Patent Images
1. A semiconductor memory apparatus, comprising:
- a memory cell array configured to include a plurality of memory cells;
a switching unit configured to be coupled to a data input buffer through data input and output pads and control a data transfer path of data applied to the data input buffer in response to a test mode signal;
a write driver configured to drive data transferred from the switching unit and write the data in the memory cell array at a normal mode; and
a controller configured to directly transfer the data from the switching unit to the memory cell without passing through the write driver at a test mode,wherein the memory cell array and the controller are configured to be directly coupled through a first local input and output lines which are substantially connected to bit lines of the memory cells.
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Abstract
Disclosed is a semiconductor memory apparatus, including: a memory cell array configured to include a plurality of memory cells; a switching unit configured to be coupled to data input and output pads and control a data transfer path of data applied to the data input and output pads in response to a test mode signal; a write driver configured to drive data transferred from the switching unit and write the data in the memory cell array at a normal mode; and a controller configured to transfer the data from the switching unit to the memory cell at a test mode.
375 Citations
18 Claims
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1. A semiconductor memory apparatus, comprising:
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a memory cell array configured to include a plurality of memory cells; a switching unit configured to be coupled to a data input buffer through data input and output pads and control a data transfer path of data applied to the data input buffer in response to a test mode signal; a write driver configured to drive data transferred from the switching unit and write the data in the memory cell array at a normal mode; and a controller configured to directly transfer the data from the switching unit to the memory cell without passing through the write driver at a test mode, wherein the memory cell array and the controller are configured to be directly coupled through a first local input and output lines which are substantially connected to bit lines of the memory cells. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A semiconductor memory apparatus, comprising:
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a memory cell array configured to include a plurality of memory cells coupled between bit lines and source lines and driven by potential applied to word lines; and a bidirectional access control unit configured to directly transfer data, provided in a data input buffer through data input and output pads, from the bit line to the source line of the memory cell in response to a test mode signal or directly transfer the data, applied to the data input buffer, from the source line to the bit line of the memory cell, wherein the memory cell array and the bidirectional access control unit are configured to be directly coupled through a first local input and output lines which are substantially connected to bit lines of the memory cells. - View Dependent Claims (9, 10, 11, 12)
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13. A test circuit for a semiconductor memory apparatus, comprising:
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a switching unit configured to control a transfer path of data applied to a data input buffer through data input and output pads; and a bidirectional access control unit configured to receive data applied to the data input buffer and directly transfer the data to a memory cell array in response to a test mode signal, wherein the memory cell array and the bidirectional access control unit are configured to be directly coupled through a first local input and output lines or a second local input and output lines, and the first local input and output lines are configured to substantially connected to bit lines of the memory cells, and the second local input and output lines are configured to substantially connected to source lines of the memory cells. - View Dependent Claims (14, 15, 16, 17, 18)
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Specification