Extensible USB (universal serial bus) flash disk
A technology of flash disk and main control chip, applied in the field of scalable USB flash disk, can solve problems such as waste, and achieve the effects of avoiding loss, expanding storage space, great convenience and randomness
Active Publication Date: 2015-07-29
NORTHEASTERN UNIV
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Problems solved by technology
Although with the advancement of technology, the capacity of U disk flash memory chips is also constantly increasing, but for users, in order to meet the needs of large-capacity files, and constantly eliminate the relatively small-capacity U disk at hand, it will bring a lot of waste and loss. inconvenient
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[0029] The present invention will be further described in detail below with reference to the drawings and specific embodiments.
[0030] The expandable USB flash drive of this embodiment, such as figure 1 As shown, it includes: the main control PCB board, the first USB main control core 2 pieces and the FLASH chip 8. On the main control PCB board are integrated crystal oscillator, chip resistors, capacitors, voltage regulator IC, the first indicator 3, the first indicator The second indicator light 7 and the USB interface 1, in which a crystal oscillator, a chip resistor, a capacitor, and a voltage regulator IC constitute the peripheral circuit 5; the first USB main control chip 2 is connected to the FLASH chip 8 through the peripheral circuit 5; The first indicator light 3 and the second indicator light 7 are both LED indicators; the FLASH chip 8 of this embodiment is composed of two Intel JS29F16B08CCME1 chips (25NM 16GB MLC), a total of 32G, to realize data storage.
[0031] Suc...
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The invention discloses an extensible USB (universal serial bus) flash disk, and belongs to the field of USB flash disc design. The extensible USB flash disk comprises a main control PCB (printed circuit board), a first USB main control chip, a FLASH chip, a peripheral circuit and a USB interface, and also comprises a pressing type switch, a second USB main control chip, a cascading interface A, a cascading interface B, wherein the first USB main control chip is connected with the FLASH chip through the peripheral circuit, and when no other USB flash disk is connected, the USB interface is conducted with the first USB main control chip through the pressing type switch. When another USB flash disk is connected with USB flash disk through the cascading interfaces, the pressing type switch of the cascading interface A is triggered, the switching to the second USB main control chip is realized, and the USB interface is conducted with the second USB main control chip through the pressing type switch, so that the storage space of the other USB flash disk becomes a part of the storage space of the USB flash disk. In the practical life, the flexible combined use can be realized, the storage space is expanded, great convenience and selectivity can be brought to the data backup process of people, and the cost for changing a memory with the larger volume is saved for users.
Description
Technical field [0001] The invention belongs to the field of USB flash disk design, and specifically relates to an expandable USB flash disk. Background technique [0002] With the development of computer software and hardware, people's requirements for multimedia entertainment are getting higher and higher. With the improvement of the definition of audio and video files, the space occupied by them is also getting larger and larger. Many single file sizes of entertainment audio and video types It’s getting bigger and bigger, and many people have had this experience: there are two small-capacity U disks at hand, and there is a large file that cannot be divided to be copied, and one U disk cannot fit, and the files to be copied cannot be installed separately. In two U disks. Although with the advancement of technology, the capacity of U disk flash memory chips is also increasing, but for users, in order to meet the needs of large-capacity files, and constantly eliminating the rela...
Claims
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IPC IPC(8): G11C7/10
Inventor 王宇任涛
Owner NORTHEASTERN UNIV