公开(公告)号：US11704238B1

公开(公告)日：2023-07-18

申请号：US17693420

申请日：2022-03-14

Applicant: Silicon Motion, Inc.

Inventor： Yi-Kai Pai

IPC: G06F12/02

CPC classification number: G06F12/0246 ,  G06F2212/7201

Abstract: A method of caching mapping table for use in a flash memory device having a flash memory controller and a flash memory is provided. The method includes: in response to a host read/write command, checking a G2F mapping table to determine whether a required group of a L2P mapping table has been loaded to a DRAM of the flash memory controller and accordingly obtain a node index indicating which memory node of the DRAM the group is stored in; recording the node index to a first region of a SRAM of the flash memory controller; accessing the DRAM to obtain an L2P address indicating a physical address that is associated with the host read/write command from the group of the L2P mapping table by referencing the node index stored in the first region of the SRAM; and performing a read/write operation on the flash memory according to the L2P address.

公开(公告)号：US11977767B2

公开(公告)日：2024-05-07

申请号：US17693431

申请日：2022-03-14

Applicant: Silicon Motion, Inc.

Inventor： Yi-Kai Pai

IPC: G06F3/06 ,  G06F12/02

CPC classification number: G06F3/0656 ,  G06F3/0604 ,  G06F3/0631 ,  G06F3/0659 ,  G06F3/0679 ,  G06F12/0238 ,  G06F2212/7201

Abstract: A method of caching mapping table for use in a flash memory device having a flash memory controller and a flash memory is provided. The method includes: in response to a host read command, determining whether a group of a logical-to-physical (L2P) required by handling the host read command has been loaded to a DRAM of the flash memory controller; if the required group of the L2P mapping table has not been loaded to the DRAM, loading the required group of the L2P mapping table from the flash memory to a SRAM of the flash memory controller; directly accessing the SRAM to obtain an L2P address associated with the host read command from the required group of the L2P mapping table; and performing a read operation on the flash memory in response to the host read command according to the obtained L2P address.

公开(公告)号：US20230289091A1

公开(公告)日：2023-09-14

申请号：US17693431

申请日：2022-03-14

Applicant: Silicon Motion, Inc.

Inventor： Yi-Kai Pai

IPC: G06F3/06 ,  G06F12/02

CPC classification number: G06F3/0656 ,  G06F3/0659 ,  G06F3/0631 ,  G06F3/0604 ,  G06F3/0679 ,  G06F12/0238 ,  G06F2212/7201

Abstract: A method of caching mapping table for use in a flash memory device having a flash memory controller and a flash memory is provided. The method includes: in response to a host read command, determining whether a group of a logical-to-physical (L2P) required by handling the host read command has been loaded to a DRAM of the flash memory controller; if the required group of the L2P mapping table has not been loaded to the DRAM, loading the required group of the L2P mapping table from the flash memory to a SRAM of the flash memory controller; directly accessing the SRAM to obtain an L2P address associated with the host read command from the required group of the L2P mapping table; and performing a read operation on the flash memory in response to the host read command according to the obtained L2P address.