CN213069787U - Read-write control system of memory card - Google Patents
Read-write control system of memory card Download PDFInfo
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- CN213069787U CN213069787U CN202022510322.4U CN202022510322U CN213069787U CN 213069787 U CN213069787 U CN 213069787U CN 202022510322 U CN202022510322 U CN 202022510322U CN 213069787 U CN213069787 U CN 213069787U
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Abstract
The utility model provides a read-write control system of memory card, including memory card interface, host system interface and controlling means. When the memory card operates with a first communication protocol, the memory card interface is electrically connected with the host system interface through the selector and the bridge device; when the memory card operates with a second communication protocol, the memory card interface is electrically connected with the host system interface through the selector, and the memory card interface is also electrically connected with the host system interface through the bridge device.
Description
Technical Field
The present invention relates to an electronic device, and more particularly, to a read/write control system for a memory card.
Background
With the rapid development of information technology, electronic products are increasingly popular, such as handheld electronic devices such as notebook computers, mobile phones, tablet computers, and the like, are widely available. Since these electronic devices are portable and can be used anytime and anywhere, and in order to connect various electronic devices with each other for a relatively large amount of data transmission, a memory card is usually inserted into a card reader to make the electronic product read the data of the memory card, so as to expand the memory storage capacity of the electronic product.
However, as the data access speed of the memory card is faster and faster, the memory card with the newer version specification cannot be accessed in the control mode of the older version specification, so that the memory card with the newer specification cannot be used in the card reader with the older version specification, which causes the problem of compatibility between the memory card and the control chip of the card reader, and reduces the use flexibility of the memory card. When the memory card with the newer version specification is accessed in the control mode with the newer version specification, the transmission bandwidth of the control mode is far larger than that of the older version specification, so that the communication design between the memory card and the card reader control chip is more complex, and the cost of the control chip is increased. In view of the above, there is still a need to develop a new electronic device and method thereof to improve the above problems.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a read-write control system of memory card, by controlling means's bridging device and selector, make the host system only need see through a swift (NVMe) agreement driver of non-volatile memory, can read and write the data of memory card with different communication protocols, solve compatible problem between memory card and the read-write control system to improve the use elasticity of memory card, reduce read-write control system's manufacturing cost simultaneously.
To achieve the above object, an embodiment of the present invention provides a read/write control system for a host system to read/write data of a memory card, the read/write control system including: a memory card interface for connecting the memory card; a host system interface electrically connected to the memory card interface and connected to the host system; and a control device electrically connected to the memory card interface and the host system interface, including: a bridge device electrically connected to the host system interface and the memory card interface; and a selector, electrically connected to the host system interface, the memory card interface and the bridge device; when the memory card operates with a first communication protocol, the memory card interface is electrically connected with the host system interface through the selector and the bridge device; when the memory card operates with a second communication protocol, the memory card interface is electrically connected with the host system interface through the selector, and the memory card interface is also electrically connected with the host system interface through the bridge device.
In one embodiment, the control device detects that the memory card is electrically connected to the memory card interface, and defaults to connecting with the memory card with the first communication protocol, so as to activate the memory card with the first communication protocol.
In one embodiment, the bridging device comprises: a first interface electrically connected to the memory card interface and the host system interface; and a second interface electrically connected to the memory card interface and the selector; when the memory card operates with the first communication protocol, the memory card interface is electrically connected with the host system interface through the selector, the second interface and the first interface, wherein a transmission path among the memory card interface, the second interface, the first interface and the host system interface is defined as a first transmission path, and a transmission path among the memory card interface, the selector, the second interface, the first interface and the host system interface is defined as a second transmission path, so that the host system communicates with the memory card interface through the first transmission path and reads and writes the data of the memory card through the second transmission path by the first communication protocol; when the memory card operates with the second communication protocol, the memory card interface is electrically connected with the host system interface through the selector, and the memory card interface is electrically connected with the host system interface through the first interface of the bridge device, wherein a transmission path among the memory card interface, the selector and the host system interface is defined as a third transmission path, and a transmission path among the memory card interface, the first interface and the host system interface is defined as a fourth transmission path, so that the host system communicates with the memory card interface through the third transmission path and reads and writes the data of the memory card through the fourth transmission path with the second communication protocol.
In one embodiment, the host system interface includes a first sub-interface and a second sub-interface, the memory card interface is electrically connected to the second sub-interface of the host system interface through the bridge device, and the memory card interface is also electrically connected to the first sub-interface of the host system interface through the selector.
In one embodiment, when the memory card operates according to the second communication protocol, the second interface triggers the selector with a trigger signal, so that the memory card interface is electrically connected to the first sub-interface of the host system interface through the selector, and the memory card interface is electrically connected to the second sub-interface of the host system interface through the first interface.
In one embodiment, the host system communicates with the memory card through the host system interface, the bridge device and the selector to determine whether the memory card supports protocol versions of the host system, where the protocol versions include pci 1.0, pci 2.0 and pci 3.0.
In one embodiment, when the host system confirms that the first communication protocol of the memory card supports the pci 1.0 protocol version or the pci 2.0 protocol version of the host system through the host system interface, the host system reads and writes the data of the memory card through the host system interface, the first interface, the second interface and the selector, and when the host system confirms that the second communication protocol of the memory card supports the pci 3.0 protocol version of the host system through the host system interface, the host system reads and writes the data of the memory card through the host system interface and the first interface of the bridge device.
In an embodiment, the bridge device further includes a flash memory express protocol controller electrically connected to the second sub-interface of the host system interface through the first interface, when the memory card does not support the operation of the second communication protocol, a non-volatile memory express (NVMe) protocol driver of the host system accesses data of the memory card through the host system interface, the first interface, the flash memory express protocol controller and the second interface, and when the memory card supports the operation of the second communication protocol, the flash memory express (NVMe) protocol driver of the host system accesses data of the memory card through the host system interface and the first interface.
In one embodiment, the second interface is electrically connected to the first interface through the flash memory controller.
In one embodiment, the first communication protocol of the memory card is defined as Secure Digital (SD) mode, and the second communication protocol of the memory card is defined as secure digital (SD Express) mode.
In one embodiment, the data transmission rate of the first communication protocol of the memory card is smaller than the data transmission rate of the second communication protocol.
The utility model discloses a read-write control system, by controlling means's bridging device and selector, make the host system only need see through the swift (NVMe) agreement driver of a non-volatile memory, can read and write the data of memory card with different communication protocol, solve compatible problem between memory card and the read-write control system to improve the use elasticity of memory card, reduce read-write control system's manufacturing cost simultaneously.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art to which the present invention pertains, other drawings can be obtained according to the drawings.
FIG. 1 is a block diagram of a read/write control system according to an embodiment of the present invention.
Detailed Description
Referring to the drawings, wherein like reference numbers represent the same element or similar elements, the principles of the present invention are illustrated in an exemplary operating environment. The following description is based on illustrated embodiments of the invention and should not be taken as limiting the invention with regard to other embodiments that are not detailed herein.
Referring to FIG. 1, a block diagram of a read/write control system according to a first embodiment of the present invention is shown. The read/write control system is used for a host system 103 to read/write data of a memory card 100. The read/write control system includes a memory card interface 101, a host system interface 102, and a control device 106.
As shown in fig. 1, the memory card interface 101 is used to connect to the memory card 100. The host system interface 102 is electrically connected to the memory card interface 101, and the host system 103 is connected to the host system interface 102. The control device 106 includes a bridge device 109 and a selector 114, the bridge device 109 is electrically connected to the host system interface 102 and the memory card interface 101, and the selector 114 is electrically connected to the host system interface 102, the memory card interface 101 and the bridge device 109. When the memory card 100 operates according to the first communication protocol, the memory card interface 101 is electrically connected to the host system interface 101 through the selector 114 and the bridge device 109. When the memory card 100 operates according to the second communication protocol, the memory card interface 101 is electrically connected to the host system interface 101 through the selector 114, and the memory card interface 101 is also electrically connected to the host system interface 102 through the bridge device 109.
As shown in fig. 1, in an embodiment, the host system 103 detects that the memory card interface 101 is electrically connected to the host system interface 102 via the control device 106, and defaults to connect to the memory card 100 with the first communication protocol, so as to initialize or start (initiate process) the memory card 100 with the first communication protocol. The initialization is, for example, the host system interface 102 provides the memory card 100 with the power required for operation, the host system interface 102 transmits the operation and access commands to the memory card 100, and the memory card interface 101 establishes the bidirectional communication between the host system interface 102 and the memory card 100.
As shown in fig. 1, in an embodiment, the bridge device 109 includes a first interface 110 and a second interface 112. The first interface 110 is electrically connected to the memory card interface 101 and the host system interface 102, and the second interface 112 is electrically connected to the memory card interface 101 and the selector 114. In one embodiment, the first interface 110 is, for example, a control interface or a controller. The second interface 112 is, for example, a control interface or a controller.
As shown in fig. 1, in one embodiment, when the memory card 100 operates in the first communication protocol, when the first communication protocol of the memory card 100 is Secure Digital (SD) mode, the memory card interface 101 is electrically connected to the host system interface 102 via the selector 114, the second interface 112 and the first interface 110, wherein the transmission path among the memory card interface 101, the second interface 112, the first interface 110 and the host system interface 102 is defined as a first transmission path P1, the transmission path among the memory card interface 101, the selector 114, the second interface 112, the first interface 110, and the host system interface 102 is defined as a second transmission path P2, such that the host system 103 communicates with the memory card interface 101 through the first transmission path P1 and reads and writes the data of the memory card 100 through the second transmission path P2 with the first communication protocol. In one embodiment, the host system 103 detects that the memory card interface 101 is electrically connected to the host system interface 102 through the host system interface 102 via the first transmission path P1. The host system 103 initializes the memory card 100 with the first communication protocol via the host system interface 102 via the first transmission path P1. In a preferred embodiment, during the process of detecting the connection of the memory card 100, the host system 103 initializes or boots the memory card 100 according to the first communication protocol, for example, through the host system interface 102 and the first interface 110, the non-volatile memory express (NVMe) controller 200 and the second interface 112 of the bridge device 109.
As shown in fig. 1, in one embodiment, when the memory card 100 operates in the second communication protocol, for example, when the second communication protocol of the memory card 100 is a secure digital (SD Express) mode, the memory card interface 101 is electrically connected to the host system interface 102 via the selector 114, the memory card interface 102 is electrically connected to the host system interface 102 via the first interface 110 of the bridge device 109, wherein the transmission path among the memory card interface 101, the selector 114 and the host system interface 102 is defined as a third transmission path P3, the transmission path among the memory card interface 101, the first interface 110 and the host system interface 102 is defined as a fourth transmission path P4, such that the host system 103 communicates with the memory card interface 101 through the third transmission path P3 and reads and writes the data of the memory card 100 through the fourth transmission path P4 according to the second communication protocol. After determining that the memory card 100 supports the second communication protocol, the embodiment, for example, initializes or starts (initiates) the memory card 100 according to the second communication protocol, so as to perform subsequent communication or read/write operations.
As shown in FIG. 1, in an embodiment, the memory card interface 101 conforms to, for example, a secure digital memory card (secure digital memory card) protocol, such as, but not limited to, protocol versions SD-UHS I, SD-UHS II, SD-UHS III, and SD 7.0. In one embodiment, the first communication protocol of the memory card 100 is defined as a Secure Digital (SD) mode, such as SD-UHS I, SD-UHS II, SD-UHS III protocol versions. The second communication protocol of the memory card 100 is defined as secure digital (SD Express) mode. The secure digital mode is a previous protocol version of a secure digital mode, and the secure digital mode is a Secure Digital (SD)7.0 protocol version, such as a version supporting the Secure Digital (SD)7.0 protocol version or a later updated protocol version. The data transmission rate of the first communication protocol of the memory card 100 is smaller than the data transmission rate of the second communication protocol. The host system interface 102 is, for example, a peripheral component interconnect express (PCIe) root complex (PCIe) component, which is used to connect a processor and a memory to a PCIe switch fabric composed of one or more switch devices, and may be disposed in a notebook computer, a mobile phone, a tablet computer, or other electronic devices with a processor and a memory connected thereto. The control device 106 is, for example, but not limited to, a control chip or a control circuit of the card reader.
As shown in fig. 1, in one embodiment, the host system interface 102 includes a first sub-interface 102a and a second sub-interface 102 b. For example, the first sub-interface 102a includes a PCI Express Reset (PERST #) signal, a clock request run signal (CLKREQ #), and a reference clock differential pair signal (REFCLK, REFCLK +, REFCLK-), wherein the PERST #) signal is used for managing the Reset operation of the second sub-interface 102 b; a frequency request operation signal (clock request, CLKREQ #) for requesting a reference frequency operation; the reference frequency differential pair signal (reference clock, REFCLK +, REFCLK-) is used to provide the reference frequency. The first sub-interface 102a is electrically connected to the first interface 110 of the bridge device 109 and the selector 114 for transmitting the 4 signals, including the PERST #, CLKREQ #, REFCLK +, REFCLK-4 signals. The second sub-interface 102b is used for performing data transmission/reception (TX/RX) between the host system interface 102 and the memory card interface 101. The second sub-interface 102b supports the pci 1.0, pci 2.0 and pci 3.0 protocol versions. For example, the transmission bandwidth of PCIe1.0 is 2.5GHz, the transmission bandwidth of PCIe2.0 is 5.0GHz, and the transmission bandwidth of PCIe3.0 is 8.0 GHz. In one embodiment, the memory card interface 101 is electrically connected to the second sub-interface 102b of the host system interface 102 through the bridge device 109, and the memory card interface 101 is also electrically connected to the first sub-interface 102a of the host system interface 102 through the selector 114.
As shown in fig. 1, in one embodiment, when the memory card 100 operates in the second communication protocol, the second interface 112 triggers the selector 114 with a trigger signal TS, so that the memory card interface 101 is electrically connected to the first sub-interface 102a of the host system interface 102 through the selector 114, and the memory card interface 101 is electrically connected to the second sub-interface 102b of the host system interface 102 through the first interface 110.
As shown in fig. 1, in one embodiment, the host system 103 communicates with the memory card 100 through the host system interface 102, the bridge device 109 and the selector 114 to determine whether the memory card 100 supports protocol versions of the host system 103, including the protocol versions pcie1.0, pcie2.0 and pcie 3.0. When the host system 103 confirms through the host system interface 102 that the first communication protocol of the memory card 100 supports the pci 1.0 protocol version or the pci 2.0 protocol version of the host system 103, the host system 103 reads and writes the data of the memory card 100 through the host system interface 102, the first interface 110, the second interface 112 and the selector 114, and when the host system 103 confirms through the host system interface 102 that the second communication protocol of the memory card 100 supports the pci 3.0 protocol version of the host system 103, the host system 103 reads and writes the data of the memory card 100 through the host system interface 102 and the first interface 110 of the bridge device 109.
As shown in fig. 1, in an embodiment, the second interface 112 of the bridge device 109 includes a control interface 112a and a transceiver interface 112b, the control interface 112a is connected to the memory card interface 101, the transceiver interface 112b is connected to the selector 114, and the second interface 112 is used for the operations of the control interface 112a and the transceiver interface 112 b. The control interface 112a includes signals such as secure digital command (SD CMD) and secure digital clock (SD CLK) for establishing a communication link between the second interface 112 and the memory card interface 101. The transceiving interface 112b includes secure digital data (SD DAT), such as SD DAT 0-3, which includes 4 bits for transceiving data between the second interface 112 and the memory card interface 101. The control interface 112a and the transceiving interface 112b of the second interface 112 are respectively used for converting the communication and data transmission formats between the first sub-interface 102a and the second sub-interface 102b of the host system interface 102 and the first communication protocol. In one embodiment, the selector 114 is a multiplexer, but is not limited to this, such as a selector composed of circuit elements or logic elements. In one embodiment, the second interface 112 is, for example, a SD-UHS I host controller. In one embodiment, the first interface 110 is used for switching between a first communication protocol and a second communication protocol, or the first interface 110 receives commands through the first sub-interface 102a and the second sub-interface 102b of the host system interface 102 to switch between the first communication protocol and the second communication protocol.
As shown in fig. 1, in an embodiment, the bridge device 109 further includes an NVMe controller 200 electrically connected to the second sub-interface 102b of the host system interface 102 through the first interface 110, when the memory card 100 does not support the operation of the second communication protocol, a non-volatile memory express (NVMe) protocol driver of the host system 103 accesses data of the memory card 100 through the host system interface 102, the first interface 110, the NVMe controller 200, the second interface 112 and the selector 114 by using the NVMe controller 200, and when the memory card 100 supports the operation of the second communication protocol, the non-volatile memory express (NVMe) protocol driver of the host system 103 accesses data of the memory card 100 through the host system interface 102 and the first interface 110.
According to the above, the read/write control system of the present invention, by means of the bridge device 109 and the selector 114 of the control device 106, the host system 103 can support different communication protocols to read/write the data of the memory card 100 only by using a non-volatile memory express (NVMe) protocol driver, thereby solving the problem of compatibility between the memory card 100 and the read/write control system, improving the flexibility of the memory card 100, and reducing the production cost of the read/write control system.
To sum up, the utility model discloses a read-write control system, by controlling means's control module and selector, make the host system only need see through an interface, can solve compatible problem between memory card and the read-write control system with the data of different communication protocol read-write memory card to improve memory card's use elasticity, reduce read-write control system's manufacturing cost simultaneously.
In summary, although the present application has been described with reference to the preferred embodiments, the above-described preferred embodiments are not intended to limit the present application, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present application, so that the scope of the present application shall be determined by the appended claims.
Claims (11)
1. A read-write control system for a host system to read and write data of a memory card, the read-write control system comprising:
a memory card interface for connecting the memory card;
a host system interface electrically connected to the memory card interface and connected to the host system; and
a control device electrically connected to the memory card interface and the host system interface, comprising:
a bridge device electrically connected to the host system interface and the memory card interface; and
a selector electrically connected to the host system interface, the memory card interface and the bridge device;
when the memory card operates with a first communication protocol, the memory card interface is electrically connected with the host system interface through the selector and the bridge device;
when the memory card operates with a second communication protocol, the memory card interface is electrically connected with the host system interface through the selector, and the memory card interface is also electrically connected with the host system interface through the bridge device.
2. The read-write control system of claim 1, wherein the control device detects that the memory card is electrically connected to the memory card interface and defaults to connecting with the memory card with the first communication protocol, so as to activate the memory card with the first communication protocol.
3. The read-write control system of claim 1, wherein the bridge device comprises:
a first interface electrically connected to the memory card interface and the host system interface; and
a second interface electrically connected to the memory card interface and the selector;
when the memory card operates with the first communication protocol, the memory card interface is electrically connected with the host system interface through the selector, the second interface and the first interface, wherein a transmission path among the memory card interface, the second interface, the first interface and the host system interface is defined as a first transmission path, and a transmission path among the memory card interface, the selector, the second interface, the first interface and the host system interface is defined as a second transmission path, so that the host system communicates with the memory card interface through the first transmission path and reads and writes the data of the memory card through the second transmission path by the first communication protocol;
when the memory card operates with the second communication protocol, the memory card interface is electrically connected with the host system interface through the selector, and the memory card interface is electrically connected with the host system interface through the first interface of the bridge device, wherein a transmission path among the memory card interface, the selector and the host system interface is defined as a third transmission path, and a transmission path among the memory card interface, the first interface and the host system interface is defined as a fourth transmission path, so that the host system communicates with the memory card interface through the third transmission path and reads and writes the data of the memory card through the fourth transmission path with the second communication protocol.
4. The read-write control system of claim 3, wherein the host system interface includes a first sub-interface and a second sub-interface, the memory card interface is electrically connected to the second sub-interface of the host system interface through the bridge device, and the memory card interface is also electrically connected to the first sub-interface of the host system interface through the selector.
5. The read-write control system of claim 4, wherein the second interface triggers the selector with a trigger signal when the memory card operates according to the second communication protocol, so that the memory card interface is electrically connected to the first sub-interface of the host system interface through the selector, and the memory card interface is electrically connected to the second sub-interface of the host system interface through the first interface.
6. The write/read control system of claim 4, wherein the host system communicates with the memory card through the host system interface, the bridge device and the selector to determine whether the memory card supports protocol versions of the host system, the protocol versions including PCIe1.0, PCIe2.0 and PCIe3.0.
7. The read-write control system of claim 6, wherein when the host system determines via the host system interface that the first communication protocol of the memory card supports the pci e1.0 protocol version or the pci e2.0 protocol version of the host system, the host system reads and writes the data of the memory card via the host system interface, the first interface, the second interface and the selector, and when the host system determines via the host system interface that the second communication protocol of the memory card supports the pci e3.0 protocol version of the host system, the host system reads and writes the data of the memory card via the host system interface and the first interface of the bridge device.
8. The read-write control system of claim 4, wherein the bridge device further includes an NVMe controller electrically connected to the second sub-interface of the host system interface via the first interface, when the memory card does not support the operation of the second communication protocol, a non-volatile memory express (NVMe) protocol driver of the host system accesses data of the memory card via the host system interface, the first interface, the NVMe controller, the second interface and the selector, and when the memory card supports the operation of the second communication protocol, the non-volatile memory express (NVMe) protocol driver of the host system accesses data of the memory card via the host system interface and the first interface.
9. The read-write control system of claim 8, wherein the second interface is electrically connected to the first interface via the NVMe controller.
10. The read/write control system of claim 1, wherein the first communication protocol of the memory card is defined as Secure Digital (SD) mode, and the second communication protocol of the memory card is defined as secure digital Express (SD) mode.
11. The read-write control system of claim 1, wherein the data transmission rate of the first communication protocol of the memory card is smaller than the data transmission rate of the second communication protocol.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW108214689 | 2019-11-06 | ||
| TW108214689U TWM596388U (en) | 2019-11-06 | 2019-11-06 | Control system of accessing data for memory cards |
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| CN213069787U true CN213069787U (en) | 2021-04-27 |
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| CN202022510322.4U Active CN213069787U (en) | 2019-11-06 | 2020-11-03 | Read-write control system of memory card |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114661647A (en) * | 2020-12-22 | 2022-06-24 | 创惟科技股份有限公司 | Universal serial bus concentrator and concentrator system |
| TWI789148B (en) * | 2021-12-07 | 2023-01-01 | 瑞昱半導體股份有限公司 | Method of identifying type of memory card |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI816046B (en) * | 2020-08-19 | 2023-09-21 | 創惟科技股份有限公司 | Control system of accessing data for memory storage and method thereof |
-
2019
- 2019-11-06 TW TW108214689U patent/TWM596388U/en unknown
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2020
- 2020-11-03 CN CN202022510322.4U patent/CN213069787U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114661647A (en) * | 2020-12-22 | 2022-06-24 | 创惟科技股份有限公司 | Universal serial bus concentrator and concentrator system |
| CN114661647B (en) * | 2020-12-22 | 2024-03-01 | 创惟科技股份有限公司 | Universal serial bus line concentration device and line concentration system |
| TWI789148B (en) * | 2021-12-07 | 2023-01-01 | 瑞昱半導體股份有限公司 | Method of identifying type of memory card |
Also Published As
| Publication number | Publication date |
|---|---|
| TWM596388U (en) | 2020-06-01 |
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