公开(公告)号：US20230021898A1

公开(公告)日：2023-01-26

申请号：US17857241

申请日：2022-07-05

Applicant: Rambus Inc.

Inventor： Aws SHALLAL ,  Chen CHEN

IPC: G06F11/10 ,  G06F11/07 ,  G06F11/16

Abstract: A serial presence detect (SPD) device includes nonvolatile memory to store SPD information. Parity information suitable for single error correct and double error detect (SEC-DED) is also stored in association with the SPD information in the nonvolatile memory. The combination of SPD information and parity information is organized into codewords addressable at each memory location. During an initialization period occurring after a power on reset and before the SPD device is accepting I2C commands, the SPD device checks each memory location (codeword) for errors. Each error detected is counted to provide an indicator of device health. Before the initialization period expires, the SPD device writes a corrected codeword back to the nonvolatile memory.

公开(公告)号：US20250004650A1

公开(公告)日：2025-01-02

申请号：US18775507

申请日：2024-07-17

Applicant: Rambus Inc.

Inventor： Aws SHALLAL ,  Chen CHEN

IPC: G06F3/06

Abstract: A serial presence detect (SPD) device includes a region of nonvolatile memory for SPD data and an additional region for other (e.g., vendor) use. The additional region may be subdivided into write protect regions that can be individually and independently write protected. To configure the write protection, a password key scheme is used to enter a mode whereby the write protection attributes may be configured. Another password key scheme is used to exit the write protection configuration mode.

公开(公告)号：US20230014101A1

公开(公告)日：2023-01-19

申请号：US17857252

申请日：2022-07-05

Applicant: Rambus Inc.

Inventor： Aws SHALLAL ,  Chen CHEN

IPC: G06F3/06

Abstract: A serial presence detect (SPD) device includes a region of nonvolatile memory for SPD data and an additional region for other (e.g., vendor) use. The additional region may be subdivided into write protect regions that can be individually and independently write protected. To configure the write protection, a password key scheme is used to enter a mode whereby the write protection attributes may be configured. Another password key scheme is used to exit the write protection configuration mode.

公开(公告)号：US20240345922A1

公开(公告)日：2024-10-17

申请号：US18629677

申请日：2024-04-08

Applicant: Rambus Inc.

Inventor： Aws SHALLAL ,  Chen CHEN

IPC: G06F11/10 ,  G06F11/07 ,  G06F11/16

CPC classification number: G06F11/1068 ,  G06F11/076 ,  G06F11/1658

Abstract: A serial presence detect (SPD) device includes nonvolatile memory to store SPD information. Parity information suitable for single error correct and double error detect (SEC-DED) is also stored in association with the SPD information in the nonvolatile memory. The combination of SPD information and parity information is organized into codewords addressable at each memory location. During an initialization period occurring after a power on reset and before the SPD device is accepting I2C commands, the SPD device checks each memory location (codeword) for errors. Each error detected is counted to provide an indicator of device health. Before the initialization period expires, the SPD device writes a corrected codeword back to the nonvolatile memory.