Qualcomm Incorporated

Benish Babu

Dhamim Packer Ali

Richard Patrick

Eugen Pirvu

Hung Vuong

Steven Haehnichen

Satish Anand

William Kimberly

Robert Coleman

Nikhilesh Reddy

Baranidharan Muthukumaran

Leonard Widra

I-Heng Huang

Darshana Advani

Taara Nandakishore Ellala

Ashwani Kumar

Efrain Ortuno

William Edward Kimberly

Data may be purged from a memory device in a manner confined to a particular partition of a memory device having two or more partitions. Logical memory blocks may be de-mapped from physical memory blocks of a first storage partition of the memory device. De-mapped physical memory blocks of the first storage partition may be listed in a local de-mapped block list uniquely associated with the first storage partition. A local purge command may be received from a host device. In response to the local purge command, at least a portion of the de-mapped physical memory blocks listed only in the local de-mapped block list are purged.

Flash memory local purge

Various aspects include methods for implementing a reduced size firmware storage format on a computing device. Various aspects may include storing a first firmware description table to a first sector of a flash memory, in which the first firmware description table may define a first instance of a firmware including describing a first plurality of firmware images, storing the first plurality of firmware images to a first plurality of consecutive sectors, storing a second firmware description table to a second sector, in which the second firmware description table may define a second instance of the firmware including describing a second plurality of firmware images having a third plurality of firmware images, storing the third plurality of firmware images to a second plurality of consecutive sectors, and booting the computing device using the second firmware description table.

Partitioning flash and enabling flexible boot with image upgrade capabilities

The present disclosure provides methods for copying a data page in a flash memory device using a flash memory controller. A method may comprise receiving, at the host flash controller, a copy command from a host processor, in response to the copy command, transmitting a read command to the unmanaged flash memory storage device via a bus, wherein the read command indicates particular data, receiving the particular data from the unmanaged flash memory storage device via the bus, storing the particular data in a data buffer included in the host flash controller, and transmitting to the unmanaged flash memory storage device, via the bus, a write command to write the particular data.

Methods and apparatuses for copying a data page in an unmanaged flash memory device

A flash memory device includes an array of non-volatile memory (NVM) cells, at least one detection NVM cell, and a sensing circuit. The array of NVM cells are configured to store data. The sensing circuit is coupled to the at least one detection NVM cell and is configured to measure a charge on the at least one detection NVM cell. The sensing circuit is also configured to compare the measured charge with a threshold charge level and to trigger a refresh of the array of NVM cells in response to the measured charge being less than the threshold charge level.

Stress detection in a flash memory device

Methods, systems and devices are provided for configuring a read-write memory device with a data image. The method includes determining a data image distribution based on a virtual block size of a series of virtual blocks designated for the read-write memory device. The data image is divided into one or more data image portions, wherein a virtual boundary code is appended to at least one of the data image portions. The data image portions are stored in respective virtual blocks of the series of virtual blocks, skipping over any bad block within the read-write memory device, even between the virtual blocks.

Virtual boundary codes in a data image of a read-write memory device

Methods, systems and devices provide for refreshing a data image stored on a NAND memory device. Aspects include sequentially copying each of a series of static data partitions into a scrub portion that does not store data image partitions identified in the partition table. The sequential copying begins with a last static data partition and proceeds sequentially to a first static data partition when the scrub portion occupies higher order addresses than the last address of the last static data partition. Alternatively, the sequential copying begins with the first static data partition and proceeds sequentially to the last static data partition when the scrub portion occupies addresses that are lower than the first address of the first static data partition. The partition table may be updated as each static data partition is stored to the scrub portion. Such operations enable fail-safe scrubbing and refreshing of data in a NAND device.

Fail safe refresh of data stored in NAND memory device

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San Diego, CA, United States of America

Benish Babu