ENUMERATED PER DEVICE ADDRESSABILITY FOR MEMORY SUBSYSTEMS

    公开(公告)号:US20190042498A1

    公开(公告)日:2019-02-07

    申请号:US15987854

    申请日:2018-05-23

    Abstract: A memory subsystem enables per device addressability (PDA) to target configuration commands to one of multiple memory devices that share a select line or buffer devices that share an enable line. The system includes a host and multiple memory devices that can be coupled over a command bus and a data bus. The devices include a configuration or mode register to store a value to indicate whether PDA enumeration is enabled. When enabled, the host can provide an enumeration identifier (ID) command via the command bus with a signal via the data bus to assign an enumeration ID. After assignment of the enumeration ID, the host can send PDA commands via the command bus with the enumeration ID, without a signal on the data bus. Devices only process PDA commands that match their assigned enumeration ID, enabling the setting of device-specific configuration settings without needing to use the data bus on every PDA command.

    METHOD AND APPARATUS FOR PERFORMING ERROR HANDLING OPERATIONS USING ERROR SIGNALS
    33.
    发明申请
    METHOD AND APPARATUS FOR PERFORMING ERROR HANDLING OPERATIONS USING ERROR SIGNALS 审中-公开
    使用错误信号执行错误处理操作的方法和装置

    公开(公告)号:US20160210187A1

    公开(公告)日:2016-07-21

    申请号:US15080577

    申请日:2016-03-24

    Abstract: Provided are a method and apparatus for performing error handling operations using error signals A first error signal is asserted on an error pin on a bus to signal to a host memory controller that error handling operations are being performed by a memory module controller in response to detecting an error. Error handling operations are performed to return the bus to an initial state in response to detecting the error. A second error signal is asserted on the error pin on the bus to signal that error handling operations have completed and the bus is returned to the initial state.

    Abstract translation: 提供了一种用于使用误差信号执行错误处理操作的方法和装置。第一错误信号在总线上的错误引脚上被断言,以向主机存储器控制器通知响应于检测到的存储器模块控制器执行错误处理操作 一个错误。 执行错误处理操作以响应于检测到错误将总线返回到初始状态。 在总线上的错误引脚上断言第二个错误信号,表示错误处理操作已经完成,总线返回初始状态。

    METHOD AND APPARATUS FOR PROVIDING A HOST MEMORY CONTROLLER WRITE CREDITS FOR WRITE COMMANDS
    34.
    发明申请
    METHOD AND APPARATUS FOR PROVIDING A HOST MEMORY CONTROLLER WRITE CREDITS FOR WRITE COMMANDS 审中-公开
    提供用于写命令的主机记忆控制器写入信号的方法和装置

    公开(公告)号:US20160179742A1

    公开(公告)日:2016-06-23

    申请号:US15058126

    申请日:2016-03-01

    Abstract: Provided are a method and apparatus for providing a host memory controller write credits for write commands. A host memory controller coupled to a memory module over a bus determines whether a read data packet returned from the memory module indicates at least one write credit and increments a write credit counter in response to determining that the read data packet indicates at least one write credit.

    Abstract translation: 提供了一种用于为写入命令提供主机存储器控制器写入信用的方法和装置。 通过总线耦合到存储器模块的主机存储器控制器确定从存储器模块返回的读取数据分组是否指示至少一个写入信用,并响应于确定读取的数据分组指示至少一个写入信用来增加写入信用计数器 。

    DYNAMIC RANDOM ACCESS MEMORY BUILT-IN SELF-TEST POWER FAIL MITIGATION

    公开(公告)号:US20240021263A1

    公开(公告)日:2024-01-18

    申请号:US18373658

    申请日:2023-09-27

    Inventor: Bill NALE

    Abstract: Self-test and repair of memory cells is performed in a memory integrated circuit by two separate processes initiated by a memory controller communicatively coupled to the memory integrated circuit. To ensure that the repair process is completed in the event of an unexpected power failure, a first process is initiated by the memory controller to perform a memory Built-in Self Test (mBIST) in the memory integrated circuit and a second process is initiated by the memory controller after the mBIST has completed to perform repair of faulty memory cells detected during the MBIST process. The memory controller does not initiate the repair process if a power failure has been detected. In addition, a repair time associated with the repair process is selected such that the repair time is sufficient to complete the repair process while power is stable, if a power failure occurs after the repair process has been started.

    REFRESH COMMAND CONTROL FOR HOST ASSIST OF ROW HAMMER MITIGATION

    公开(公告)号:US20230386548A1

    公开(公告)日:2023-11-30

    申请号:US18213231

    申请日:2023-06-22

    Abstract: A memory device with internal row hammer mitigation couples to a memory controller. The memory controller or host can assist with row hammer mitigation by sending additional refresh cycles or refresh commands. In response to an extra refresh command the memory device can perform refresh for row hammer mitigation instead of refresh for standard data integrity. The memory controller can keep track of the number of activate commands sent to the memory device, and in response to a threshold number of activate commands, the memory controller sends the additional refresh command. With the extra refresh command the memory device can refresh the potential victim rows of a potential aggressor row, instead of simply refreshing a row that has not been accessed for a period of time.

    PERFECT ROW HAMMER TRACKING WITH MULTIPLE COUNT INCREMENTS

    公开(公告)号:US20220121398A1

    公开(公告)日:2022-04-21

    申请号:US17561598

    申请日:2021-12-23

    Abstract: A memory device can internally track row address activates for perfect row hammer tracking, incrementing an activate count for each row when an access command is received for a row. Instead of incrementing the count for each activate, the memory controller can indicate a number greater than one for the memory device to increment the count, and then indicate not to increment the count for subsequent accesses up to the number indicated. The memory controller can determine whether the row address of an activate command is one of N recent row addresses that received the access command. The memory controller can indicate an increment of zero if the row address is one of the N recent addresses, and indicate an increment of a number higher than one if the row address is not one of the N recent addresses.

    MEMORY CHIP WITH PER ROW ACTIVATION COUNT HAVING ERROR CORRECTION CODE PROTECTION

    公开(公告)号:US20210365316A1

    公开(公告)日:2021-11-25

    申请号:US17339754

    申请日:2021-06-04

    Abstract: A memory chip is described. The memory chip includes storage cells along a row of the memory chip's storage cell array to store a count value of the row's activations and error correction code (ECC) information to protect the count value. The memory chip includes ECC read logic circuitry to correct an error in the count value. The memory chip includes a comparator to compare the count value against a threshold. The memory chip includes circuitry to increment the count value if the count value is deemed not to have reached the threshold and ECC write logic circuitry to determine new ECC information for the incremented count value, and write driver circuitry to write the incremented count value and the new ECC information into the storage cells. The memory chip includes circuitry to cause the row to be refreshed if the count value is deemed to have reached the threshold.

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