KR100634452B1 - System with memory card of storing data read and write speed information - Google Patents

Abstract

The system of the present invention reads a memory card including a multi register for storing one or more data read and write speed information and the data read and write speed information stored in the multi register to determine whether it satisfies its performance requirements. Characterized in that it comprises a host.

Memory card, host, multi register, data read rate, data write rate

Description

A memory card storing data read and write speed information and a system including the same {SYSTEM WITH MEMORY CARD OF STORING DATA READ AND WRITE SPEED INFORMATION}

1 is a block diagram illustrating a system consisting of a memory card and a host according to a preferred embodiment of the present invention.

2 is a flowchart illustrating a process of reading read / write speed information of a memory card in a host according to an exemplary embodiment of the present invention.

3 is a flowchart illustrating a process of reading read / write speed information of a memory card when a plurality of memory cards are accessed by a host according to an exemplary embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

100: memory card 110: multi register

120: controller 130: nonvolatile memory

200: host

The present invention relates to a system consisting of a host and a memory card, and more particularly, to a memory card including a multi register for storing one or more data read and write speed information and a value stored in the multi register to request a host. It relates to a system for determining whether the performance is satisfactory.

With the rapid development of IT technology, which is now progressing through the convergence of computer, communication, and broadcasting, highly advanced electronic information devices are constantly appearing. With these rapid advances in digital technology, people are living in a range of benefits not previously available. Recently, with the development of digital technology, various portable storage devices capable of storing multimedia data have been popularized. Such devices are used in, for example, digital camcorders, digital cameras, MP3 players, digital recorders, mobile phones, personal digital assistants (PDAs), and the like. Most of these devices use a memory device as a medium for storing data. I use a small hard disk. Among the most commonly used removable memory cards, a multimedia card (Multi-Media Card), SD card (Secure Digital Card), CF card (Compact Flash Card), USB Flash Disk, Memory Stick ( There is a removable, light and simple removable memory card such as a Memory Stick. Memory cards are stamp-sized storage devices that cannot be erased without a power supply, and are becoming a necessity for information life due to their small size and abundant storage capacity.

The history of memory cards begins with PC cards. PC card was used in portable devices such as notebooks in the late 80's, and is an extended memory standard of credit card size. In the early days, standardization was first started by the Japan Electronic Industry Promotion Association (JEIDA), and then standardized on the same card type memory in the United States through PCMCIA. Since then, JEIDA and PCMCIA have jointly standardized and became the international standard as PC Card Standard in 1995.

When digital cameras first appeared, most cameras stored data in internal memory, but some models used PC cards as media. However, as miniaturization of portable devices progressed in the 90s, PC cards became too large and burdensome media. Therefore, the need for a small and lightweight memory card to replace this, and eventually Sandisk of the United States developed "Compact Flash."

Because the compact flash mimics the PC card standard, it is compatible with the PC card on the interface and can be installed in the PC card slot using an adapter. Of course, other memories also use PC card adapters, but compact flash has the difference that the adapter performs only a simple connector role without logical data conversion.

Starting with compact flash, companies are entering the memory card market, and other types of small memory cards are emerging. In 1995, Toshiba will announce Smart Media (then SSFDC (Solid State Floppy Disk Card)), in 1997 Sony will introduce the Memory Stick, and Hitachi and San Media will jointly announce the Multi-Media Card (MMC). In 1998, Matsushida, Toshiba, and Sandisk jointly announced SD memory cards, and in 1999, Hitachi, Sanyo's Secure MMC, and Sony's Magic Gate memory stick, which added copyright protection technology, appeared.

The data read / write speed information between the memory card described above and a host such as a PC, a digital camcorder, a digital camera, an MP3 player, a digital recorder, a mobile phone, a personal digital assistant (PDA), and the like can be operated by a system consisting of a memory card and a host. It's an important factor that relates to performance

An object of the present invention is to provide a method of determining whether data read and write speed information provided by a memory card satisfies a required performance of a host.

In order to achieve the above object, the system according to the present invention reads a memory card including a multi register for storing one or more data read and write speed information, and reads the data read and write speed information stored in the multi register to request its operation. And a host for determining whether the performance is satisfactory.

In order to achieve the above object, in the system according to the present invention, the host reads speed information most suitable for its operation performance from a memory card.

In order to achieve the above object, if the read and write speed values provided by the memory card are larger than the minimum required speed for the data read and write operations of the host, the host and the memory card may operate normally. A data transfer operation is performed.

In order to achieve the above object, if the read and write speed values provided by the memory card are smaller than the minimum required speed for data read and write operations of the host, the host accesses the memory. Error handling and rejection of the card.

In order to achieve the above object, the memory card in the system according to the present invention is characterized in that it further comprises a non-volatile memory for storing data and a controller for controlling the operation of the memory card.

In order to achieve the above object, the memory card in the system according to the present invention is a multimedia card (Multi-Media Card), SD card (Secure Digital Card), CF card (Compact Flash Card), USB Flash Disk (USB Flash Disk), It is characterized in that any one of the memory stick (Memory Stick).

In order to achieve the above object, in the system according to the present invention, the host is any one of a PC, a digital camcorder, a digital camera, an MP3 player, a digital recorder, a mobile phone, and a personal digital assistant (PDA).

In order to achieve the above object, a read and write speed setting method for data transmission of a system consisting of a memory card and a host including a multi-register storing one or more data read and write speed information according to the present invention comprises: 1) the host; Reads the data read and write speed information stored in the multi register from the memory card; and 2) the host reads from the memory card and the minimum required speed for data read and write operations. And comparing the speed values with each other to determine whether the host device satisfies the required performance of the host.

(Example)

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram illustrating a system consisting of a memory card and a host according to a preferred embodiment of the present invention.

The system consists of a host 200 such as a PC, a digital camcorder, a digital camera, an MP3 player, a digital recorder, a mobile phone, a personal digital assistant (PDA) and the like, and a memory card 100.

The memory card 100 may have one or more data read and write speeds, and may perform an operation by determining a data read and write speed according to an operation performance required by the host 200.

The memory card 100 includes a multi register 110, a controller 120, and a nonvolatile memory 130.

The multi register 110 stores data read and write speed information provided by the memory card 100, and each speed information is stored in the memory card 100 having one or more data read and write speeds. ) The multi-register 110 may be configured as shown in Table 1, for example. The multi-registers in Table 1 have eight storage spaces, each containing three read speed information and three write speed information. The bit values in Table 1 represent data read and write speeds that the memory card 100 can perform.

Register number beat speed Remarks Register 1 0 to 7 X4, 26Mhz Read speed Register 2 0 to 7 X4, 52Mhz / X8, 26Mhz Read speed Register 3 0 to 7 X8, 52Mhz Read speed Register 4 0 to 7 Reserved Read speed Register 5 0 to 7 X4, 26Mhz Write speed Register 6 0 to 7 4, 52Mhz / X8, 26Mhz Write speed Register 7 0 to 7 8, 52Mhz Write speed Register 8 0 to 7 Reserved Write speed

The controller 120 controls the overall operation of the memory card 100, and the nonvolatile memory 130 is used as a space for storing data information.

In the system consisting of the host 200 and the memory card 100, communication between the host and the memory card is performed at a low data communication speed during an initialization process, and the host 200 may determine a memory card 100 suitable for its operation performance. You will do a number of setup tasks, such as determining read and write speeds. At this time, the host 200 reads the speed information most suitable for its operation performance from the data read and write speed information stored in the multi-register 110 of the memory card 100 during the initialization process. If the read and write speed values provided by the memory card 100 are smaller than the minimum required speed for data read and write operations of the host 200, the host 200 may reject the accessed memory card 100. do. On the other hand, if the read and write speed values provided by the memory card 100 are larger than the minimum required speeds for the data read and write operations of the host 200, the normal data transfer operation between the host 200 and the memory card 100 is performed. This is done. In this manner, it is determined whether the data read and write speed information provided by the memory card satisfies the required performance of the host.

2 is a flowchart illustrating a process of reading read / write speed information of a memory card in a host according to an exemplary embodiment of the present invention.

The host 200 reads the speed information most suitable for its operation performance from the data read and write speed information stored in the multi register 110 of the memory card 100 (S300). The host 200 compares the minimum required speed for reading and writing data with the speed value read from the memory card 100 (S310). If the read and write speed values provided by the memory card 100 are smaller than the minimum required speeds for the data read and write operations of the host 200, the host 200 may receive an error for the accessed memory card 100. Process and refuse (S330). On the other hand, if the read and write speed values provided by the memory card 100 are larger than the minimum required speeds for the data read and write operations of the host 200, the normal data transfer operation between the host 200 and the memory card 100 is performed. This is performed (S320).

3 is a flowchart illustrating a process of reading read / write speed information of a memory card when a plurality of memory cards are accessed by a host according to an exemplary embodiment of the present invention. When the memory card 100 of the same type, which differs only in data read and write speeds, approaches the host 200, the host 200 first selects one memory card 100, so that its operation performance and Appropriate speed information is read from the data read and write speed information stored in the multi-register 110 of the memory card 100 (S400). The host 200 compares the minimum required speed for data read and write operations with the speed value read from one memory card 100 (S410). If the read and write speed values provided by the memory card 100 are smaller than the minimum required speeds for the data read and write operations of the host 200, the host 200 selects another accessed memory card 100. Thus, the step (S400) of reading the speed information most suitable for its operation performance from the data read and write speed information stored in the multi register 110 of the memory card 100 is repeated. On the other hand, if the read and write speed values provided by the memory card 100 are larger than the minimum required speeds for the data read and write operations of the host 200, the normal data transfer operation between the host 200 and the memory card 100 is performed. This is performed (S420).

As described above, the optimum embodiment has been disclosed in the drawings and the specification. Although specific terms have been used herein, they are used only for the purpose of describing the present invention and are not intended to limit the scope of the invention as defined in the claims or the claims. Therefore, those skilled in the art will understand that various modifications and equivalent other embodiments are possible from this. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

  According to the present invention as described above, it is possible to determine whether the data read and write speed information provided by the memory card satisfies the required performance of the host, and thus the effect of speeding up the operation start time of the system composed of the host and the memory card. Can be obtained.

Claims (8)

A memory card including multiple registers for storing one or more data read and write speed information; And a host that reads the data read and write speed information stored in the multi-register to determine whether it satisfies its operation demand performance. The method of claim 1, And said host reads its operating performance and the speed information most suitable from a memory card. The method of claim 1, And a normal data transfer operation between the host and the memory card is performed when the read and write speed values provided by the memory card are larger than the minimum required rates for the data read and write operations of the host. The method of claim 1, When the read and write speed values provided by the memory card are smaller than the minimum required speeds for the data read and write operations of the host, the host processes an error and rejects the accessed memory card. System. The method of claim 1, The memory card includes a nonvolatile memory for storing data; And a controller for controlling the operation of the memory card. The method of claim 1, The memory card may be any one of a multimedia card (Multi-Media Card), an SD card (Secure Digital Card), a CF card (Compact Flash Card), a USB flash disk, and a memory stick. System. The method of claim 1, The host is any one of a PC, a digital camcorder, a digital camera, an MP3 player, a digital recorder, a mobile phone, a personal digital assistant (PDA). A read and write speed setting method for data transfer of a system consisting of a host and a memory card including multiple registers for storing at least one data read and write speed information; Reading, by the host, the speed information most suitable for its operation performance from data read and write speed information stored in the multi-register; And comparing, by the host, a minimum required speed for data read and write operations with the speed value read from the memory card, and determining whether the host device satisfies the required performance of the host.

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