Multi-channel hybrid density memory storage device and control method thereof
AssigneeA-Data Technology Co., Ltd.
InventorsMing-Dar Chen, Chuan-Sheng Lin, Tso-Cheng Su, Shih-Fang Hung, Tzu-Wei Fang, Hsiang-An Hsieh
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Abstract
The present invention discloses a control method of a multi-channel hybrid density memory storage device for access a user data. The storage device includes a plurality of low density memories (LDM) and high density memories (HDM). The steps of the method comprises: first, determining where the user data transmitted; then, using one of two error correction circuits which have different error correction capability to encode or decode the user data.
Claims17
A multi-channel hybrid density memory storage device which is suitable for accessing a user data, the said multi-channel hybrid density memory storage device comprising:
- a non-volatile memory unit, which consists of a plurality of memory groups, wherein each memory group has at least one low density memory (LDM) and at least one high density memory (HDM);
- a plurality of data transmission lines coupled to each memory group, respectively;
- and
- a control unit, which is coupled to the memory groups by the data transmission lines, used for accessing the user data in the LDM or HDM;
- wherein when the user data is to be transferred from the HDM to the LDM's, the control unit is configured to equally divide the user data before transferring the equally divided user data to the LDM's which are belonging into different memory groups;
- wherein when the user data is to be transferred from the LDM's to the HDM, the control unit is configured to merge the user data in the LDM's which are belonging into different memory groups before transferring the merged user data to the HDM.
A control method of a multi-channel hybrid density memory storage device, which is suitable for accessing a user data, wherein the storage device has a non-volatile memory unit having a plurality of memory groups connected in parallel, each of which has at least one low density memory (LDM) and at least one high density memory (HDM), the control method comprising:
- A. providing a first error correction circuit and a second error correction circuit in the storage device, wherein an error correction capability of the first error correction circuit is lower than an error correction capability of the second error correction circuit;
- B. determining a transmission direction of the user data;
- C. performing an encoding or decoding procedure on the user data by using the first error correction circuit or the second error correction circuit based on the transmission direction of the user data;
- and
- D. when the transmission direction is from the LDM's to the HDM merging the user data in the LDM's which are belonging into different memory groups before the transferring the merged used data to the HDM, and when the transmission direction is from the HDM to the LDM's equally dividing the user data before transferring the equally divided user data to the LDM's which are belonging into different memory groups.
Dependencies are inferred from the claim text.