172 results about "Multi media card" patented technology

Peripheral devices store data in non-volatile phase-change memory (PCM). PCM cells have alloy resistors with high-resistance amorphous states and low-resistance crystalline states. The peripheral device can be a Multi-Media Card/Secure Digital (MMC/SD) card. A PCM controller accesses PCM memory devices. Various routines that execute on a CPU in the PCM controller are activated in response to commands in the host-bus transactions. The PCM system increases the throughput of one or more phase-change memory devices by performing one or more of a read-ahead memory operation, a write-ahead memory write operation, a larger page memory write operation, a wider data bus memory write operation, a multi-channel concurrent multi-bank interleaving memory read or write operation, a write-cache memory write operation, and any combination thereof.

A flash memory card includes a differential datapath that enables communications between the flash memory card and a host device to be performed using differential signals. The differential datapath can translate between the differential signals and card-specific signals that control read/write operations to the memory array of the flash memory card. The card-specific signals can be standard MultimediaCard, Secure-Digital card, Memory Stick, or CompactFlash card signals, among others. A host device that provides differential data transfer capability can include a similar differential datapath. By using differential data transfer rather than conventional clocked data transfer, overall data bandwidth between a flash memory card and a host device can be significantly increased, while simultaneously decreasing power consumption and pin requirements.

The invention provides a security data storage method and system, which are applicable to processors supporting ARM TrustZone technology, and use an eMMC (Embeded Multi Media Card) supporting an RPMB (Replay Protected Memory Block) partition as a storage medium. The method comprises the following steps that trusted application programs, secure storage service programs and produced security data objects are protected by a trusted execution environment; the secure storage service programs provide set and access of the security data objects for the trusted application programs, and call an encryption and decryption module to encrypt and decrypt the security data objects; the encrypted security data objects are shared with eMMC RPMB drive programs in a non-trusted execution environment through a shared memory page; the eMMC RPMB drive programs in the non-trusted execution environment complete access and storage on the eMMC RPMB partition. According to the security data storage method and the system, the security data objects can be enabled to be stored reliably.

A Multi-Media Card (MMC) Single-Chip Flash Device (SCFD) contains a MMC flash microcontroller and flash mass storage blocks containing flash memory arrays that are block-addressable rather than randomly-addressable. An initial boot loader is read from the first page of flash by a state machine and written to a small RAM. A central processing unit (CPU) in the microcontroller reads instructions from the small RAM, executing the initial boot loader, which reads more pages from flash. These pages are buffered by the small RAM and written to a larger DRAM. Once an extended boot sequence is written to DRAM, the CPU toggles a RAM_BASE bit to cause instruction fetching from DRAM. Then the extended boot sequence is executed from DRAM, copying an OS image from flash to DRAM. Boot code and control code are selectively overwritten during a code updating operation to eliminate stocking issues.

A multi media card (MMC) is disclosed. The MMC includes a flash controller and at least one flash memory device. The flash controller increases the throughput of the at least one flash memory device to match the speed of a host bus coupled to the MMC. The flash controller increases the throughput by performing one or more of performing a read-ahead memory read operation, performing a write-ahead memory write operation, increasing the size of a page register of the at least one flash memory device, increasing the width of a memory data bus, performing a dual-channel concurrent memory read operation, performing a dual-channel concurrent memory write operation, performing a write-cache memory write operation, and any combination thereof.

An embodiment of the present invention includes a high speed multi-media card system for automatic detection of high speed communication including a host and one or more media cards, coupled to the host through a one or more of data lines, at least one of which is a serial data line. The one or more media cards each have a unique card identification number (CID) associated therewith. In response to a first command from the host requesting each card's unique CID and responsive thereto, said one or more media cards send their respective CID, through the serial data line, to the host and if the sent CID matches that which is expected from the host, the host transmits a second command assigning a relative card address (RCA) to the card whose CID made the match. The one or more media cards drive a predetermined value on all or a portion of the one or more of data lines and the host automatically senses the predetermined value which is indicative of operation at high speeds by the cards which have driven the predetermined value onto the data lines. The host communicates, in high speed mode, with the cards which have driven the predetermined value onto the data lines.

A memory card of one published standard, such as the Multi-Media Card (MMC) or Secure Digital Card (SD), is modified to include the function of a Subscriber Identity Module (SIM) according to another published standard. The controller of the memory card communicates between electrical contacts on the outside of the card and both the memory and the SIM. In one specific form, the memory card has the physical configuration of the current Plug-in SIM card with a few external contacts added to accommodate the memory controller and data memory. In another specific form, the memory card has the physical configuration of the current SD card, including external contacts.

The invention provides an electronic power transformer based on a multi-media card (MMC). The electronic power transformer based on the MMC comprises the MMC and a direct current-direct current (DC-DC) isolator. The MMC comprises a plurality of sub-modules which are connected in series, the direct current output side and the direct current input side of the DC-DC isolator are respectively connected with capacitors in parallel, the direct current output side of the DC-DC isolator is connected with a low voltage direct current power grid, the direct current input side of the DC-DC isolator is connected with the direct current output ends of the sub-modules, and each sub-module comprises a half-bridge circuit and a capacitor, wherein the half-bridge circuits and the capacitors are connected in parallel. When direct current capacitor voltage of the MMC is unbalanced, the sub-modules with high capacitor voltage in the MMC charge the capacitors with low voltage to raise voltage values through the DC-DC isolator with the help of the low voltage direct current power grid and then through the DC-DC isolator again, stability of voltage on the direct current side is guaranteed, and therefore automatic balance of the direct current capacitor voltage of the MMC is achieved.

A circuit module comprising a leadframe having at least one die pad, a plurality of contacts, and a plurality of conductive traces extending from respective ones of the contacts toward the die pad. The traces are bent in a manner wherein the die pad and the contacts extend along respective ones of spaced, generally parallel frame planes. Attached to the die pad is a semiconductor die which extends along a die plane disposed between and generally parallel to the frame planes. The semiconductor die is electrically connected to at least one of the traces. A body at least partially encapsulates the leadframe and the semiconductor die such that the die pad is exposed within a top surface defined by the body and the contacts are exposed within a bottom surface defined by the body.

The specification and drawings present a new method, apparatus and software product for performance enhancement of a memory device (e.g., a memory card) using a pre-erase mechanism. The memory device can be, e.g., a memory card, a multimedia card or a secure digital card, etc. A new command or commands can be used to inform a memory device controller when the data in one particular sector, allocation unit or block can be deleted. Using that information the memory device controller then can be able to do some internal maintenance, e.g., by moving valid data from a fragmented erase block to another so that the fragmented erase block can be cleared and erased for future use as well as performing effective wear levelling maintenance and write performance optimization.

The invention discloses a modular full direct current photovoltaic system and a control method thereof. The system comprises n DC (direct current)-DC converter modules and an MMC (Multi Media Card) centralized inverter, and every DC-DC converter module is connected with an independent control loop and a maximum power tracking control function so as to ensure that a photovoltaic battery pack connected with every DC-DC converter works on the highest point of the output power. According to the modular full direct current photovoltaic system and a control method thereof, a direct current bus is formed by connecting the output ends of a plurality of DC-DC converter modules in series, and the high-power grid-connected power generation function is achieved through the centralized MMC inverter. The direct current bus can effectively reduce the operating loss of the entire system and structurally improve the operating efficiency of the system.

The invention discloses a three-phase UPQC (Unified Power Quality Controller) topology circuit based on a MMC (Multi Media Card) and belongs to the technical fields of flexible alternating-current power transmission and distribution in a power system and power electronics. The three-phase UPQC topology circuit comprises a parallel connection module, a series connection module, a power transmission line A-phase line, a power transmission line B-phase line, a power transmission line C-phase line, a first isolation transformer, a second isolation transformer and a third isolation transformer. The three-phase UPQC topology circuit has the beneficial effects that the parallel connection module of a unified power quality controller can be conveniently and directly suspended on a power transmission line of a medium and high voltage power distribution system without a transformer, so that the equipment investment and the equipment loss are reduced, and the space is saved; through a modular design, the redundancy of a device can be conveniently improved, and the running reliability of the device can be increased; and standardized and socialized mass production is also facilitated, so that the production period of equipment is shortened, and the production cost of the equipment is further reduced.

A Multi-Media Card/Secure Digital (MMC/SD) single-chip flash device contains a MMC/SD flash microcontroller and flash mass storage blocks containing flash memory arrays that are block-addressable rather than randomly-addressable. MMC/SD transactions from a host MMC/SD bus are read by a bus transceiver on the MMC/SD flash microcontroller. Various routines that execute on a CPU in the MMC/SD flash microcontroller are activated in response to commands in the MMC/SD transactions. A flash-memory controller in the MMC/SD flash microcontroller transfers data from the bus transceiver to the flash mass storage blocks for storage. Rather than boot from an internal ROM coupled to the CPU, a boot loader is transferred by DMA from the first page of the flash mass storage block to an internal RAM. The flash memory is automatically read from the first page at power-on. The CPU then executes the boot loader from the internal RAM to load the control program.

A personal multi-media device (PMD) and methods of use thereof is disclosed. The PMD includes a controller portion having a host processor, a keypad connected to the host processor arranged to receive a user supplied command, and a display unit arranged to display an image, or a series of correlated images, derived from a multi-media content file stored in a multi-media card connected to the personal multi-media device. The PMD also includes a cartridge portion connected to the controller portion by way of a multi-media content address/data bus having a slave processor arranged to decode the multi-media content file as directed by the host processor, and a mailbox coupling the slave processor to the host processor arranged as an addressable latch configured to provide an information channel between the host processor and the slave processor.

A system and method for conducting a media session includes a host station, a client station, and a playlist station networked together. Clients search for multimedia files (audio, video, karaoke, and/or images files) on the system and make media selections from touchscreen or other interactive displays or devices. The host station generates a rotating queue of the requested media selections and cycles through the media selections in the queue. Processed data of the media selections is sent to peripheral devices, such as an audio system and a monitor. The playlist station is communicatively connected to a monitor or other device for publicly displaying or otherwise conveying playlist information to clients at a venue. The system is at least partially operable in an automated fashion. For example, one or more of the acts of processing search queries and requests from the users, storing the requests in the rotating queue, and cycling through the requests in the rotating queue can be automated without requiring manual intervention by a DJ/KJ or other moderator.

<heading lvl="0">Abstract of Disclosure</heading> A remote communication apparatus such as a mobile digital telephone adapted to receive interrogation from time to time with respect to the identification of a user of the apparatus from a network provider and including means to hold an identification module within the apparatus which can provide for that authentication of the user to an external interrogation from time to time, with an appropriate identification module means to receive any interrogation signals and adapted in the case that the identification signals are appropriate for seeking identification of a network providers subscriber identification module, then effecting a direction of such incoming inquiry signals to information being stored whereby the appropriate identification can be provided in reply, and in the event of an interrogation other than from the network provider, then, as appropriate, directing such further interrogation to other memory means the further memory means including either passive memory or memory contained on removable means such as a smart card, a multi-media card or the like.

The invention discloses a control method of MMC-HVDC (multi media card-high voltage direct current) during power grid malfunction of a receiving end. The control method includes following steps: 1, measuring to acquire a voltage instantaneous value and a current instantaneous value of a transformer outlet; 2, acquiring a positive sequence voltage d axis component, a positive sequence voltage q axis component, a negative sequence voltage d axis component and a negative sequence voltage q component through a 1/4 periodic signal delay principle, separating the positive and negative sequence components, and obtaining positive and negative sequence components of a network voltage under a synchronous rotating reference frame through coordinate transformation; and 3, dividing a voltage equation into a positive sequence equation and a negative sequence equation, and indicating the positive sequence components and the negative sequence components of various electrical capacities respectively by superscript P and N. The control method has the advantages of enabling a flexible direct current system to have unsymmetrical fault ride-through ability and the like.

An electronic device such as a storage device or memory card comprising a unitary case having opposed first and second sides, a closed first end, an open second end, and an interior chamber collectively defined by the first and second sides and the first end. Disposed within the second side of case is a window which communicates with the interior chamber thereof. Disposed within the interior chamber is a substrate having a plurality of contacts. The substrate is oriented within the interior chamber of the case such that the contacts are exposed within the window thereof. The substrate is maintained in a prescribed position relative to the case by a spring clip which is also advanced into the interior chamber and is cooperatively engaged to the substrate.

The invention provides an isolation type DC/DC (direct current/direct current) converter based on a modularized multilevel current converter. The converter comprises an input end modular multilevel current converter, a high-frequency transformer and an output end modular multilevel current converter, wherein the input end modular multilevel current converter is connected with the output end modular multilevel current converter through the high-frequency transformer. The input end modular multilevel current converter and the output end modular multilevel current converter respectively adopt MMC (multi media card) sub modules, high voltage is born, the voltage level is high, the transmission capacity is great, the expandability is high, in addition, the alternating current conversion link waveform distortion factor in the middle process is small, the harmonic wave content is low, and the electric isolation can be effectively realized on the input and output side of the converter.

A burn-in method for an embedded Multi Media Card (eMMC), and a test board using the same, and an eMMC tested by the same. The disclosed burn-in method comprises the steps as below: writing a test pattern to a flash memory of the eMMC; electrically connecting a command line of the eMMC to ground to operate the eMMC in a boot state; performing a burn-in procedure on the flash memory when the eMMC is in the boot state and the test pattern is recognized as being contained in the flash memory; and collecting a test report during the burn-in procedure, wherein the test report is stored in the flash memory.

A Multi-Media Card/Secure Digital (MMC/SD) single-chip flash device contains a MMC/SD flash microcontroller and flash mass storage blocks containing flash memory arrays that are block-addressable rather than randomly-addressable. MMC/SD transactions from a host MMC/SD bus are read by a bus transceiver on the MMC/SD flash microcontroller. Various routines that execute on a CPU in the MMC/SD flash microcontroller are activated in response to commands in the MMC/SD transactions. A flash-memory controller in the MMC/SD flash microcontroller transfers data from the bus transceiver to the flash mass storage blocks for storage. Rather than boot from an internal ROM coupled to the CPU, a boot loader is transferred by DMA from the first page of the flash mass storage block to an internal RAM. The flash memory is automatically read from the first page at power-on. The CPU then executes the boot loader from the internal RAM to load the control program.

A flash memory device with a plurality of protocols comprises a body, a memory device, a terminal group, and a control unit. The control unit is connected to the memory device and the terminal group for driving and controlling data access in the memory device. The control unit is at least able to transfer data by a SD (Secure Digital) protocol and a MMC (MultiMedia Card) protocol. The control unit further comprises a detection circuit. The detection circuit can detect the protocol supported by an external device, and can switch the control unit to use the SD protocol or the MMC protocol to transfer data to the external device.