Patent application number | Description | Published |
20100268897 | MEMORY DEVICE AND MEMORY DEVICE CONTROLLER - A memory device controller interposed between a memory device and a host device includes a data communication unit configured to transfer data to and from the memory device in synchronization with a clock signal. The data communication unit supports a single edge synchronization mode in which data is transferred in synchronization with either one of a rising edge and a falling edge of the clock signal, and a double edge synchronization mode in which data is transferred in synchronization with both the rising edge and the falling edge. The data communication unit transfers data in the double edge synchronization mode when data is transferred by the memory device operating as a bus master. | 10-21-2010 |
20100325349 | SEMICONDUCTOR STORAGE DEVICE - A semiconductor storage device, includes a plurality of flash memories and a controller for the flash memories. The flash memory includes a data cache operable to hold data for at least one record page in writing, the flash memory includes a plurality of erasure blocks each having a plurality of record pages, the record page is classified into a first record page and a second record page of which write time is longer than a write time of the first record page, and the controller for the flash memories is configured to: divide the plurality of flash memories into at least two groups; perform write control by interleaving data in the groups for each record page; determine whether a page to be written data is of the first record page or the second record page; and when it is determined that the page to be written data is the first record page, after a lapse of a first predetermined time from start of writing data of one of the groups, the controller starts writing data of another one of the groups, and when it is determined that the page to be written data is the second record page, after a lapse of a second predetermined time being longer than the first predetermined time from start of writing data of one of the groups, the controller starts writing data of another one of the groups. | 12-23-2010 |
20110161779 | SEMICONDUCTOR RECORDING DEVICE, CONTROL METHOD OF SEMICONDUCTOR RECORDING DEVICE, AND SEMICONDUCTOR RECORDING SYSTEM - Included are a flash memory onto which user data and parity data are recorded, an external interface unit which receives a first write command for instructing recording of the user data onto the flash memory, and a block managing unit which manages management information indicating whether parity data is valid or invalid. When the user data related to the first write command received through the external interface unit is recorded onto the flash memory 18, the block managing unit updates the management information so as to indicate that the parity data corresponding to the user data is invalid. | 06-30-2011 |
20110214034 | SEMICONDUCTOR RECORDING DEVICE AND SEMICONDUCTOR RECORDING DEVICE CONTROL METHOD - A semiconductor recording device includes: flash memories including a plurality of physical blocks each including a plurality of pages; an external interface unit which receives data to be recorded on the flash memories; a first ECC generation unit which generates a first ECC code by adding parity data to the data; a data writing unit which records the data based on the first ECC code into the pages in the flash memories; and a page shuffling unit which controls assignment of a symbol of the first ECC code to the pages, and the page shuffling unit controls the assignment of the symbol of the first ECC code such that the symbol of the first ECC code is assigned to pages having at least two page numbers in the physical blocks included in a group. | 09-01-2011 |
20120007952 | RECORDING CONTROL APPARATUS, SEMICONDUCTOR RECORDING APPARATUS, RECORDING SYSTEM, AND NONVOLATILE STORAGE MEDIUM - A recording control apparatus includes an input unit operable to input plural kinds of image data composing a stereoscopic image or a high-definition image, and a recording controller operable to control recording of the plural kinds of image data input by the input unit, to a nonvolatile storage medium. The recording controller controls the recording so that the plural kinds of image data input by the input unit are recorded to different erase blocks of the nonvolatile storage medium in such a manner that different kinds of image data are not mixed in one erase block of the nonvolatile storage medium. | 01-12-2012 |
20120017139 | INFORMATION RECORDING AND REPRODUCING APPARATUS - An information recording and reproducing apparatus writes user data received from an external device into a recording medium and reads the user data from the recording medium so as to transmit the user data to the external terminal. The information recording and reproducing apparatus includes an external interface unit operable to transmit and receive the user data to and from the external device, a first ECC generator operable to generate parity data corresponding to the user data, an access unit operable to control recording and reading of the user data or the parity data to and from the recording medium, a recording controller operable to record the user data and the first parity data to the recording medium via the access unit, an ECC correcting unit operable to correct an error of the user data read from the recording medium using the parity data read from a nonvolatile memory via the access unit, and a reproducing controller having a first reproducing mode for reading and reproducing the user data without reading the parity data from the recording medium at the time of reproducing data and a second reproducing mode for reading and reproducing at least the parity data from the recording medium, the reproducing controller operable to detect presence or non-presence of an error of the user data read from the recording medium during execution of the first reproducing mode and executing the second reproducing mode when the presence of an error is detected. | 01-19-2012 |
20120331337 | MEMORY CARD CONTROLLER, MEMORY CARD ADAPTOR AND MEMORY CARD DRIVE - A memory card controller includes a receiver, a flow controller, a continuity determination unit, and a command controller. When size of data transferred from the memory card reaches transfer size specified by first read command, the command controller controls the flow controller to transmit a response representing a transfer busy state, and pauses a transfer operation of the memory card. When the receiver receives a second read command in a state that the transfer operation of the memory card is paused, the command controller controls the flow controller to transmit a response representing transfer ready state to the transfer authorization request from the memory card so as to restart a transfer operation of the memory card. | 12-27-2012 |
20130239203 | INFORMATION RECORDING DEVICE, RECORDING MEDIUM, AND INFORMATION RECORDING SYSTEM - An information recording system includes a recording medium capable of limiting a function by password and an information recording device for controlling the recording medium. The recording medium stores an input password, counts updating event (s) of a password, stores the update count of the password, outputs information stored in the password related information storage according to a READ request issued from the information recording device, compares a input password with a password stored in the password register, limits a predetermined function of the recording medium according to the comparison result from the password comparator. The information recording device stores a password and a password identification ID which is associated with the update count of the password, selects a password with reference to the update count of the password and the password identification ID and outputs the selected password into the recording medium to compare the passwords. | 09-12-2013 |
20130239207 | INFORMATION RECORDING SYSTEM AND RECORDING MEDIUM - An information recording system includes a recording medium and an information recording device. The information recording device has a group password manager for saving a group password used for a predetermined group and an identification ID of the group password; a password setter for registering the group password in a password register of the recording medium and registering the identification ID in a password related information storage; a password selector for reading the identification ID from the password related information storage of the recording medium and selecting a group password corresponding to the identification ID from at least one group password stored in the group password manager according to the identification ID; and a limitation cancel requester for inputting the password selected by the password selector in the password comparator of the recording medium. | 09-12-2013 |
20140258563 | MEMORY CARD CONTROLLER AND HOST DEVICE INCLUDING THE SAME - An interface selection unit physically determines whether or not a memory card is compatible with a first transfer mode, based on the result of signal exchange with the memory card via a first interface unit, to select a first interface unit or a second interface unit. If the second interface unit is selected, a memory card control unit performs an initialization process to cause the memory card to be accessible via the second interface unit, and thereafter, logically determines whether or not the memory card is compatible with the first transfer mode, based on information read from the memory card. | 09-11-2014 |
20140258735 | PORTABLE RECORDING MEDIUM, SYSTEM INCLUDING THE PORTABLE RECORDING MEDIUM, AND DATA RECOVERY METHOD OF THE PORTABLE RECORDING MEDIUM - A technique of the present invention includes a storage section for storing contents data and an encryption flag indicating that any one of an encryption recording mode and a non-encryption recording mode is set, an encrypting engine for encrypting contents data using an encryption key when the encryption recording mode is set, and a control section for controlling a storage section so that the encryption key and the encrypted contents data are stored when the encryption recording mode is set. Further, when the setting is changed from the encryption recording mode into the non-encryption recording mode, the control section controls the storage section so that the encryption flag is changed to indicate the setting of the non-encryption recording mode with the continuous storage of the encryption key. | 09-11-2014 |