Semiconductor memory and memory system using the same
First Claim
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1. A semiconductor memory comprising:
- a memory block configured to perform an operation according to a first test pattern or a second test pattern;
a switching circuit configured to provide the first test pattern or the second test pattern to the memory block according to a first test mode signal and a second test mode signal; and
a test pattern setup circuit configured to store a test pattern source signal in a feedback loop varied according to a third test mode signal and output the stored test pattern source signal as the first test pattern.
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Abstract
A semiconductor memory includes a memory block configured to perform an operation according to a first test pattern or a second test pattern, a switching circuit configured to provide the first test pattern or the second test pattern to the memory block according to a first test mode signal and a second test mode signal, and a test pattern setup circuit configured to store a test pattern source signal in a feedback loop varied according to a third test mode signal and output the stored test pattern source signal as the first test pattern.
5 Citations
21 Claims
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1. A semiconductor memory comprising:
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a memory block configured to perform an operation according to a first test pattern or a second test pattern; a switching circuit configured to provide the first test pattern or the second test pattern to the memory block according to a first test mode signal and a second test mode signal; and a test pattern setup circuit configured to store a test pattern source signal in a feedback loop varied according to a third test mode signal and output the stored test pattern source signal as the first test pattern. - View Dependent Claims (2, 3, 4, 5, 6, 19, 20, 21)
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7. A memory system comprising:
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a plurality of channels, wherein the memory system is configured to operate remaining channels according to a first test pattern other than one channel among the plurality of channels, and allow the one channel to perform a test operation according to a second test pattern. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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Specification