Buffered multi-rank memory modules configured to selectively link rank control signals and methods of operating the same
First Claim
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1. A memory module, comprising:
- a plurality of semiconductor memory devices on a substrate to provide a dual in-line memory module (DIMM) organized into at least two ranks; and
a memory buffer,wherein when a parallel bit test operation is started with respect to the plurality of semiconductor memory devices, the memory buffer changes a rank control signal received from a memory controller from inactive to active based on a mapping table defined according to a mode register set signal to perform the parallel bit test operation simultaneously to all the ranks.
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Abstract
A method of operating a memory module including a plurality of semiconductor memory devices organized into a multi-rank memory on a DIMM and a memory buffer included on the DIMM, operatively coupled to the multi-rank memory, can be provided by mapping an access to the DIMM from a memory controller to semiconductor memory devices included in more than one rank within the multi-rank memory based on a mode register set signal and selectively linking rank control signals during a parallel bit test operation to the more than one rank within the multi-rank memory plurality of semiconductor memory devices.
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10 Claims
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1. A memory module, comprising:
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a plurality of semiconductor memory devices on a substrate to provide a dual in-line memory module (DIMM) organized into at least two ranks; and a memory buffer, wherein when a parallel bit test operation is started with respect to the plurality of semiconductor memory devices, the memory buffer changes a rank control signal received from a memory controller from inactive to active based on a mapping table defined according to a mode register set signal to perform the parallel bit test operation simultaneously to all the ranks. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification