Memory device and refresh method for PSRAM
AssigneeWinbond Electronics Corp.
InventorsChien-Ti Hou, Ying-Te Tu
Life of this patent
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Abstract
A memory device is provided. The memory device includes a pseudo static random access memory (PSRAM), a word line (WL) arbitrator and a refresh controller. The WL arbitrator receives a WL signal and segments the WL signal according to a burst length setting value, to obtain a segmented WL signal. In a synchronous mode, the refresh controller provides a first refresh trigger signal corresponding to the WL signal to refresh the PSRAM. In a smart refresh mode, the refresh controller provides a second refresh trigger signal corresponding to the segmented WL signal to refresh the PSRAM.
Claims9
A memory device, comprising:
- a pseudo static random access memory (PSRAM);
- a word line arbitrator, receiving a word line signal, and segmenting the word line signal according to a burst length setting value, to obtain a segmented word line signal;
- and
- a refresh controller, providing a first refresh trigger signal corresponding to the word line signal to refresh the PSRAM in a synchronous mode, and providing a second refresh trigger signal corresponding to the segmented word line signal to refresh the PSRAM in a smart refresh mode,
- wherein the number of pulses of the segmented word line signal is determined by the burst length setting value.
A refresh method for a pseudo static random access memory (PSRAM), comprising:
- in response to a burst length setting value, providing a segmented word line signal according to a word line signal;
- and
- selectively providing a first refresh trigger signal corresponding to the word line signal or a second refresh trigger signal corresponding to the segmented word line signal, to refresh the PSRAM,
- wherein the number of pulses of the segmented word line signal is determined by the burst length setting value.
Dependencies are inferred from the claim text.