Patents by Inventor Yang-Chih Shen

Yang-Chih Shen has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20250252048
    Abstract: A control circuit, comprising a storage circuit and a processor. The storage circuit is configured to store a retry sequence table and a plurality of read-voltage tables. The processor is coupled to the storage circuit, and is configured to access a memory comprising a plurality of blocks. When a read error occurs in a first block of the plurality of blocks, the processor sequentially uses the plurality of read-voltage tables to perform a retry test on the first block according to a retry sequence indicated by the retry sequence table. When a retry history data of the first block matches an adjustment condition, the processor adjusts the retry sequence indicated by the retry sequence table.
    Type: Application
    Filed: January 15, 2025
    Publication date: August 7, 2025
    Inventors: Yang-Chih SHEN, Po Sheng CHOU, Bo-Yan JHAN
  • Publication number: 20250156093
    Abstract: A flash memory controller for controlling a flash memory module includes a communication interface for receiving a first data and a second data; and a processing circuit for dynamically controlling a data writing mode of the flash memory module according to an amount of stored data in the flash memory module. If the amount of stored data in the flash memory module is less than a first threshold when the communication interface receives the first data, the processing circuit controls the flash memory module so that the first data is written into the first data block under an one-bit-per-cell mode. If the amount of stored data in the flash memory module is greater than the first threshold when the communication interface receives the second data, the processing circuit controls the flash memory module so that the second data is written into the second data block under a two-bit-per-cell mode.
    Type: Application
    Filed: January 16, 2025
    Publication date: May 15, 2025
    Applicant: Silicon Motion, Inc.
    Inventors: Tsung-Chieh Yang, Chun-Chieh Kuo, Ching-Hui Lin, Yang-Chih Shen
  • Patent number: 12236115
    Abstract: A flash memory controller for controlling a flash memory module includes a communication interface for receiving a first data and a second data; and a processing circuit for dynamically controlling a data writing mode of the flash memory module according to an amount of stored data in the flash memory module. If the amount of stored data in the flash memory module is less than a first threshold when the communication interface receives the first data, the processing circuit controls the flash memory module so that the first data is written into the first data block under an one-bit-per-cell mode. If the amount of stored data in the flash memory module is greater than the first threshold when the communication interface receives the second data, the processing circuit controls the flash memory module so that the second data is written into the second data block under a two-bit-per-cell mode.
    Type: Grant
    Filed: January 15, 2024
    Date of Patent: February 25, 2025
    Assignee: Silicon Motion, Inc.
    Inventors: Tsung-Chieh Yang, Chun-Chieh Kuo, Ching-Hui Lin, Yang-Chih Shen
  • Publication number: 20240152288
    Abstract: A flash memory controller for controlling a flash memory module includes a communication interface for receiving a first data and a second data; and a processing circuit for dynamically controlling a data writing mode of the flash memory module according to an amount of stored data in the flash memory module. If the amount of stored data in the flash memory module is less than a first threshold when the communication interface receives the first data, the processing circuit controls the flash memory module so that the first data is written into the first data block under an one-bit-per-cell mode. If the amount of stored data in the flash memory module is greater than the first threshold when the communication interface receives the second data, the processing circuit controls the flash memory module so that the second data is written into the second data block under a two-bit-per-cell mode.
    Type: Application
    Filed: January 15, 2024
    Publication date: May 9, 2024
    Applicant: Silicon Motion, Inc.
    Inventors: Tsung-Chieh Yang, Chun-Chieh Kuo, Ching-Hui Lin, Yang-Chih Shen
  • Patent number: 11914873
    Abstract: A flash memory controller for controlling a flash memory module includes a communication interface for receiving a first data and a second data; and a processing circuit for dynamically controlling a data writing mode of the flash memory module according to an amount of stored data in the flash memory module. If the amount of stored data in the flash memory module is less than a first threshold when the communication interface receives the first data, the processing circuit controls the flash memory module so that the first data is written into the first data block under an one-bit-per-cell mode. If the amount of stored data in the flash memory module is greater than the first threshold when the communication interface receives the second data, the processing circuit controls the flash memory module so that the second data is written into the second data block under a two-bit-per-cell mode.
    Type: Grant
    Filed: May 19, 2021
    Date of Patent: February 27, 2024
    Assignee: Silicon Motion, Inc.
    Inventors: Tsung-Chieh Yang, Chun-Chieh Kuo, Ching-Hui Lin, Yang-Chih Shen
  • Patent number: 11126558
    Abstract: A high-performance data storage device is disclosed. A controller updates a sub mapping table on the temporary storage in response to a write command of the non-volatile memory issued by a host. The mapping sub-table corresponds to a logical group involved in the write command and is downloaded from the non-volatile memory. When the mapping sub-table has not been completely downloaded to the temporary storage memory, the controller pushes the write command to a waiting queue to avoid dragging the performance of the data storage device.
    Type: Grant
    Filed: December 27, 2019
    Date of Patent: September 21, 2021
    Assignee: SILICON MOTION, INC.
    Inventors: Wei-Lin Kao, Yang-Chih Shen, Jian-Yu Chen
  • Publication number: 20210271402
    Abstract: A flash memory controller for controlling a flash memory module includes a communication interface for receiving a first data and a second data; and a processing circuit for dynamically controlling a data writing mode of the flash memory module according to an amount of stored data in the flash memory module. If the amount of stored data in the flash memory module is less than a first threshold when the communication interface receives the first data, the processing circuit controls the flash memory module so that the first data is written into the first data block under an one-bit-per-cell mode. If the amount of stored data in the flash memory module is greater than the first threshold when the communication interface receives the second data, the processing circuit controls the flash memory module so that the second data is written into the second data block under a two-bit-per-cell mode.
    Type: Application
    Filed: May 19, 2021
    Publication date: September 2, 2021
    Inventors: Tsung-Chieh Yang, Chun-Chieh Kuo, Ching-Hui Lin, Yang-Chih Shen
  • Patent number: 11080203
    Abstract: High performance data storage device is disclosed, which has a memory controller dynamically updating mapping information on the temporary storage to manage physical space information mapped to a logical address recognized by a host. The memory controller uses a first bit to an Nth bit of the physical space information to indicate a physical space of the non-volatile memory or a cache address of the data cache space, without using additional bits to map the physical space information to the non-volatile memory or the data cache space, where N is a number greater than one. Among numbers formed by the first to the Nth bit, the memory controller uses numbers corresponding to non-existent physical space of the non-volatile memory to map the physical space information to the non-volatile memory or the data cache space.
    Type: Grant
    Filed: September 17, 2019
    Date of Patent: August 3, 2021
    Assignee: SILICON MOTION, INC.
    Inventors: Yang-Chih Shen, Shih-Chang Chang
  • Patent number: 11048421
    Abstract: A flash memory controller for controlling a flash memory module includes a communication interface for receiving a first data and a second data; and a processing circuit for dynamically controlling a data writing mode of the flash memory module according to an amount of stored data in the flash memory module. If the amount of stored data in the flash memory module is less than a first threshold when the communication interface receives the first data, the processing circuit controls the flash memory module so that the first data is written into the first data block under an one-bit-per-cell mode. If the amount of stored data in the flash memory module is greater than the first threshold when the communication interface receives the second data, the processing circuit controls the flash memory module so that the second data is written into the second data block under a two-bit-per-cell mode.
    Type: Grant
    Filed: September 24, 2020
    Date of Patent: June 29, 2021
    Assignee: Silicon Motion, Inc.
    Inventors: Tsung-Chieh Yang, Chun-Chieh Kuo, Ching-Hui Lin, Yang-Chih Shen
  • Patent number: 10990325
    Abstract: A write control method, an associated data storage device and the controller thereof are provided. The write control method includes: receiving one or more commands from a host device and executing the one or more commands, and performing determining operations to generate determining results; in response to the determining results, starting performing write collection; collecting and handling one or more write commands to buffer data of the one or more write commands through a buffer memory, and performing other determining operations to generate other determining results; in response to the other determining results, according to a quantity of one or more collected and handled write commands, determining whether data thereof has filled up a write buffer region of the buffer memory; and in response to the data having filled up the write buffer region, flushing the write buffer region to write the data therein into a non-volatile memory.
    Type: Grant
    Filed: October 2, 2019
    Date of Patent: April 27, 2021
    Assignee: Silicon Motion, Inc.
    Inventors: Yu-Han Hsiao, Yang-Chih Shen, Huan-Jung Yeh
  • Publication number: 20210011643
    Abstract: A flash memory controller for controlling a flash memory module includes a communication interface for receiving a first data and a second data; and a processing circuit for dynamically controlling a data writing mode of the flash memory module according to an amount of stored data in the flash memory module. If the amount of stored data in the flash memory module is less than a first threshold when the communication interface receives the first data, the processing circuit controls the flash memory module so that the first data is written into the first data block under an one-bit-per-cell mode. If the amount of stored data in the flash memory module is greater than the first threshold when the communication interface receives the second data, the processing circuit controls the flash memory module so that the second data is written into the second data block under a two-bit-per-cell mode.
    Type: Application
    Filed: September 24, 2020
    Publication date: January 14, 2021
    Inventors: Tsung-Chieh Yang, Chun-Chieh Kuo, Ching-Hui Lin, Yang-Chih Shen
  • Patent number: 10824354
    Abstract: A flash memory controller for controlling a flash memory module includes a communication interface for receiving a first data and a second data; and a processing circuit for dynamically controlling a data writing mode of the flash memory module according to an amount of stored data in the flash memory module. If the amount of stored data in the flash memory module is less than a first threshold when the communication interface receives the first data, the processing circuit controls the flash memory module so that the first data is written into the first data block under an one-bit-per-cell mode. If the amount of stored data in the flash memory module is greater than the first threshold when the communication interface receives the second data, the processing circuit controls the flash memory module so that the second data is written into the second data block under a two-bit-per-cell mode.
    Type: Grant
    Filed: November 17, 2019
    Date of Patent: November 3, 2020
    Assignee: Silicon Motion, Inc.
    Inventors: Tsung-Chieh Yang, Chun-Chieh Kuo, Ching-Hui Lin, Yang-Chih Shen
  • Patent number: 10783071
    Abstract: A data storage device with a non-volatile memory on which a garbage collection operation is segmented to be accomplished at separate time intervals. Host commands are inserted to be executed between the separate time intervals. A data swap stage or/and an F2H table update stage or/and an H2F table update stage for a garbage collection operation may be segmented to be performed at separate time intervals.
    Type: Grant
    Filed: November 20, 2018
    Date of Patent: September 22, 2020
    Assignee: Silicon Motion, Inc.
    Inventors: Ting-Hsing Wang, Yang-Chih Shen
  • Publication number: 20200272574
    Abstract: High performance data storage device is disclosed, which has a memory controller dynamically updating mapping information on the temporary storage to manage physical space information mapped to a logical address recognized by a host. The memory controller uses a first bit to an Nth bit of the physical space information to indicate a physical space of the non-volatile memory or a cache address of the data cache space, without using additional bits to map the physical space information to the non-volatile memory or the data cache space, where N is a number greater than one. Among numbers formed by the first to the Nth bit, the memory controller uses numbers corresponding to non-existent physical space of the non-volatile memory to map the physical space information to the non-volatile memory or the data cache space.
    Type: Application
    Filed: September 17, 2019
    Publication date: August 27, 2020
    Inventors: Yang-Chih SHEN, Shih-Chang CHANG
  • Publication number: 20200272570
    Abstract: A high-performance data storage device is disclosed. A controller updates a sub mapping table on the temporary storage in response to a write command of the non-volatile memory issued by a host. The mapping sub-table corresponds to a logical group involved in the write command and is downloaded from the non-volatile memory. When the mapping sub-table has not been completely downloaded to the temporary storage memory, the controller pushes the write command to a waiting queue to avoid dragging the performance of the data storage device.
    Type: Application
    Filed: December 27, 2019
    Publication date: August 27, 2020
    Inventors: Wei-Lin KAO, Yang-Chih SHEN, Jian-Yu CHEN
  • Patent number: 10725902
    Abstract: A method for scheduling read commands, performed by a processing unit, includes at least the following steps: receiving a logical read command and a logical address; obtaining a high-level mapping table; obtaining a mapping table block according to the logical address and the high-level mapping table; obtaining a first physical address according to the logical address and the mapping table block; outputting an actual read command and the first physical address to a storage unit to obtain a data; and outputting the data which is responsive to the logical read command. The high-level mapping table includes a plurality of records, and one of the records is utilized to illustrate a second physical address of the mapping table block.
    Type: Grant
    Filed: July 10, 2018
    Date of Patent: July 28, 2020
    Assignee: Silicon Motion, Inc.
    Inventor: Yang-Chih Shen
  • Patent number: 10642729
    Abstract: A data storage device with a non-volatile memory on which a garbage collection operation is segmented to be accomplished at separate time intervals. Host commands are inserted to be executed between the separate time intervals. A data swap stage or/and an F2H table update stage or/and an H2F table update stage for a garbage collection operation may be segmented to be performed at separate time intervals.
    Type: Grant
    Filed: November 2, 2017
    Date of Patent: May 5, 2020
    Assignee: Silicon Motion, Inc.
    Inventors: Ting-Hsing Wang, Yang-Chih Shen
  • Patent number: 10628319
    Abstract: The invention introduces a method for caching and reading data to be programmed into a storage unit, performed by a processing unit, including at least the following steps. A write command for programming at least a data page into a first address is received from a master device via an access interface. It is determined whether a block of data to be programmed has been collected, where the block contains a specified number of pages. The data page is stored in a DRAM (Dynamic Random Access Memory) and cache information is updated to indicate that the data page has not been programmed into the storage unit, and to also indicate the location of the DRAM caching the data page when the block of data to be programmed has not been collected.
    Type: Grant
    Filed: November 16, 2018
    Date of Patent: April 21, 2020
    Assignee: Silicon Motion, Inc.
    Inventors: Yang-Chih Shen, Che-Wei Hsu
  • Publication number: 20200110555
    Abstract: A write control method, an associated data storage device and the controller thereof are provided. The write control method includes: receiving one or more commands from a host device and executing the one or more commands, and performing determining operations to generate determining results; in response to the determining results, starting performing write collection; collecting and handling one or more write commands to buffer data of the one or more write commands through a buffer memory, and performing other determining operations to generate other determining results; in response to the other determining results, according to a quantity of one or more collected and handled write commands, determining whether data thereof has filled up a write buffer region of the buffer memory; and in response to the data having filled up the write buffer region, flushing the write buffer region to write the data therein into a non-volatile memory.
    Type: Application
    Filed: October 2, 2019
    Publication date: April 9, 2020
    Inventors: Yu-Han Hsiao, Yang-Chih Shen, Huan-Jung Yeh
  • Publication number: 20200081641
    Abstract: A flash memory controller for controlling a flash memory module includes a communication interface for receiving a first data and a second data; and a processing circuit for dynamically controlling a data writing mode of the flash memory module according to an amount of stored data in the flash memory module. If the amount of stored data in the flash memory module is less than a first threshold when the communication interface receives the first data, the processing circuit controls the flash memory module so that the first data is written into the first data block under an one-bit-per-cell mode. If the amount of stored data in the flash memory module is greater than the first threshold when the communication interface receives the second data, the processing circuit controls the flash memory module so that the second data is written into the second data block under a two-bit-per-cell mode.
    Type: Application
    Filed: November 17, 2019
    Publication date: March 12, 2020
    Inventors: Tsung-Chieh Yang, Chun-Chieh Kuo, Ching-Hui Lin, Yang-Chih Shen