Semiconductor memory device
View Patent ↗A semiconductor memory device includes a pad configured to receive a first write data from outside of the semiconductor memory device, and a write circuit configured to generate a plurality of second write data which are to be written in memory cells of all banks to be tested in response to a test mode signal, data strobe signals, a write enable signal, and the first write data transferred through the pad.
1. A semiconductor memory device comprising:
a pad configured to receive a first write data from outside of the semiconductor memory device; and
a write circuit configured to generate a plurality of second write data which are to be written in memory cells of all banks to be tested in response to a test mode signal, data strobe signals, a write enable signal, and the first write data transferred through the pad.
2. The semiconductor memory device of claim 1 , wherein the first write data have a predetermined burst length.
3. The semiconductor memory device of claim 2 , wherein the second write data are loaded on corresponding global input/output lines.
4. The semiconductor memory device of claim 3 , wherein the global input/output lines are disposed in a peripheral region.
5. The semiconductor memory device of claim 3 , wherein the write circuit comprises:
a first data generation unit configured to generate a plurality of third write data in response to the first write data and the data strobe signals; and
a second data generation unit configured to generate the plurality of second write data in response to the third write data, the test mode signal, the data strobe signals, and the write enable signal.
6. The semiconductor memory device of claim 5 , wherein the first data generation unit comprises a number of latches corresponding to the burst length of the first write data, the latches configured to output the third write data.
7. The semiconductor memory device of claim 5 , wherein the second data generation unit comprises a plurality of data array blocks, each comprising a number of data array units corresponding to the burst length of the first write data.
8. The semiconductor memory device of claim 7 , wherein the data array units comprise:
a first input element configured to selectively receive corresponding data among the third write data in response to the test mode signal; and
a line driving element configured to load the data inputted through the first input element on corresponding global input/output lines in response to the write enable signal.
9. The semiconductor memory device of claim 8 , wherein the line driving element comprises:
a latch part configured to latch a data inputted through the first input element;
first and second transfer parts configured to selectively transfer the latched data of the latch part in response to the write enable signal; and
first and second driving parts configured to drive corresponding global input/output lines in response to outputs of the first and second transfer parts.
10. The semiconductor memory device of claim 8 , wherein each of the data array units further comprises:
a second input element configured to receive a data during a normal mode, which is a state where the test mode signal is disabled; and
a blocking element configured to block the second input element from transferring the first write data in response to the test mode signal.