Test device and testing method for memory device
AssigneeWinbond Electronics Corp.
InventorsYing-Shan Kuo, Lih-Wei Lin, You Cyun Su
Life of this patent
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Abstract
A test device and a testing method for a memory are provided. The test device includes a selection signal generator and a plurality of test pattern generators. The selection signal generator receives a test signal via a signal input end and detects a voltage variation on the test signal to generate a test mode selection signal. The test pattern generators are coupled between the selection signal generator and a row decoder of the memory device. The test pattern generators receive the test mode selection signal, and one of the test pattern generators is activated according to the test mode selection signal to perform a test operation on at least one of a plurality of memory cell rows in the memory device.
Claims19
A test device, comprising:
- a selection signal generator receiving a test signal via a signal input end and detecting a voltage variation on the test signal to generate a test mode selection signal;
- and
- a plurality of test pattern generators coupled between the selection signal generator and a row decoder of a memory device,
- wherein the test pattern generators receive the test mode selection signal, and one of the test pattern generators is activated according to the test mode selection signal to perform a test operation on at least one of a plurality of memory cell rows in the memory device.
A testing method for a memory device, comprising:
- receiving a test signal via a signal input end and detecting a voltage variation on the test signal to generate a test mode selection signal;
- providing a plurality of test pattern generators so that the test pattern generators receive the test mode selection signal;
- and
- activating one of the test pattern generators according to the test mode selection signal to perform a test operation on at least one of a plurality of memory cell rows in the memory device.
Dependencies are inferred from the claim text.