TWM592994U - Control system of accessing data - Google Patents

Abstract

A control system of accessing data is provided. The control system includes a memory card interface, a system interface device, and a control unit. The interface device includes a first interface and a second interface. The second interface includes a first sub-interface and a second sub-interface. System interface device electrically connected to the memory card interface by the second sub-interface. The control unit includes a bridge device and a selector. When a memory card operates in a first communication protocol, the memory card interface electrically connects to the bridge device by the selector and electrically connects to the first interface by the bridge device. When the memory card operates in a second communication protocol, the memory card interface electrically connects to the first sub-interface of the second interface.

Description

Read and write control system

This creation is about an electronic device, especially about a read-write control system.

With the rapid development of information technology, the application of electronic products is becoming more and more popular, such as notebook computers, mobile phones, tablet computers and other handheld electronic devices are everywhere. Because the characteristics of these electronic devices are that they can be carried anywhere and used anytime and anywhere, and in order to allow various electronic devices to be connected to each other for a large amount of data transmission, usually a memory card is inserted into the card reader to make the above The electronic product can read the data of the memory card to expand the memory storage capacity of the electronic product.

However, as the data access speed of the memory card becomes faster and faster, the memory card of the newer version specification cannot be accessed by the control method of the older version specification, so that the memory card of the newer specification cannot be read in the older version specification. The use in the card machine causes the compatibility problem between the memory card and the control chip of the card reader, and reduces the flexibility of using the memory card. When the memory card of the newer version specification is also accessed by the control method of the newer version specification, the transmission bandwidth of this control method is much larger than that of the older version specification, so that the memory card and the card reader control chip The inter-communication design is relatively complicated, resulting in an increase in the cost of the control chip. In view of this, there is still a need to develop a new type of electronic device to improve the above problems.

One of the purposes of this creation is to provide a read-write control system. With the first interface and the second interface on the host side, the read-write control system uses a first interface with a smaller transmission bandwidth to control a memory card with a larger transmission rate. And the second interface with larger transmission bandwidth accesses the ones with larger transmission rate The memory card solves the compatibility problem between the memory card and the read-write control system, and improves the use flexibility of the memory card.

Another purpose of this creation is to provide a read-write control system. With the first interface and the second interface on the host side, the first interface channel is connected to the memory card through the control unit, and the first sub-interface of the second interface is passed through the control unit. The memory card is connected, and the second sub-interface of the second interface is directly connected to the memory card, so as to reduce the production cost of the read-write control system.

In order to achieve the above purpose, the read-write control system in one embodiment of the present invention is used to control the reading and writing of data of a memory card. The read-write control system includes: a memory card interface for connecting the memory card; The system interface device includes a first interface and a second interface, the second interface includes a first sub-interface and a second sub-interface, and the system interface device communicates with the second sub-interface of the second interface The memory card interface is electrically connected; and a control unit to connect the system interface device and the memory card interface, including: a bridge, electrically connected to the first interface of the system interface device and the memory card interface; and A selector electrically connected to the second interface, the bridge, and the memory card interface of the system interface device; wherein, when the memory card operates with a first communication protocol, the memory card interface passes the selection The device is electrically connected to the bridge, and the memory card interface is electrically connected to the first interface of the system interface device via the bridge; wherein, when the memory card operates with a second communication protocol, the The memory card interface is electrically connected to the first sub-interface and the second sub-interface of the second interface through the selector.

In one embodiment, the system interface device detects that the memory card interface is electrically connected to the system interface device and the control unit through the first interface, and the first communication protocol of the memory card is compatible with the The first interface.

In an embodiment, the system interface device communicates with the first interface through the first interface The agreement initializes the memory card.

In one embodiment, when the memory card operates with the first communication protocol, the system interface device is electrically connected to the memory card interface through the bridge and the selector, so that the system interface device uses the first interface And the first communication protocol reads and writes the data of the memory card.

In an embodiment, when the memory card operates with the second communication protocol, the system interface device reads and writes the memory with the second communication protocol through the first sub-interface and the second sub-interface of the second interface The information of the card.

In an embodiment, the first transmission bandwidth of the first interface of the system interface device is smaller than the second transmission bandwidth of the second interface.

In one embodiment, the first interface is compatible with at least one of PCIe 1.0 and PCIe 2.0 protocol versions, and the second interface is compatible with PCIe 3.0 protocol version.

In one embodiment, the first communication protocol of the memory card is defined as a secure digital (SD) mode, and the second communication protocol of the memory card is defined as an SD Express mode.

In one embodiment, the secure digital (SD) mode is a protocol version prior to the quick secure digital mode, and the quick secure digital mode is the secure digital (SD) version 7.0 protocol.

In one embodiment, the data transmission rate of the first communication protocol of the memory card is less than the data transmission rate of the second communication protocol.

In one embodiment, when the memory card operates with the first communication protocol, the bridge generates the trigger signal to trigger the selector, and the first interface is electrically connected to the memory card via the bridge and the selector Interface, and the system interface device reads and writes the data of the memory card with the first communication protocol; and when the memory card operates with the second communication protocol, the bridge generates the trigger signal to trigger the selector, the The first sub-interface of the second interface is electrically connected to the memory card interface via the selector.

In one embodiment, when the memory card operates with the second communication protocol, the system interface device scans the memory card interface with the second interface to determine whether the memory card is compatible with non-volatile memory shortcut ( NVMe) protocol; when the memory card is not compatible with the non-volatile memory shortcut protocol, the system interface device uses the first communication protocol to read and write the data of the memory card; when the memory card is compatible with non-volatile memory In the body shortcut protocol, the system interface device uses the first sub-interface and the second sub-interface of the second interface to read and write the data of the memory card using the second communication protocol.

In an embodiment, the bridge includes a control interface and a transmission interface, the control interface is connected to the memory card, and the transmission interface is connected to the selector.

The read-write control method of the read-write control system in another embodiment of the present invention is used for the read-write control system. The read-write control system includes a memory card interface, a system interface device, and a control unit. The system interface device It includes a first interface and a second interface. The second interface includes a first sub-interface and a second sub-interface, and is electrically connected to a memory card interface via a second sub-interface of the second interface. The control unit The system interface device and the memory card interface are connected, the control unit includes a bridge and a selector, the bridge is electrically connected to the first interface of the system interface device and the memory card interface, the selector is electrically The second interface, the bridge, and the memory card interface connected to the system interface device, the read-write control method includes the following steps: the system interface device detects that the memory card is connected to the system interface device and the Control unit, the first communication protocol of the memory card is compatible with the first interface; the system interface device determines whether the memory card operates with the first communication protocol or the second communication protocol through the first interface; when the memory When the card operates with the first communication protocol, the system interface device is electrically connected to the memory card through the bridge and the selector, so that the system interface device uses the first interface and The first communication protocol reads and writes the data of the memory card; when the memory card operates with the second communication protocol, the system interface device uses the first sub-interface and the second sub-interface of the second interface to use the The second communication protocol reads and writes the data of the memory card.

In one embodiment, the system interface device initializes the memory card with the first communication protocol through the first interface.

In an embodiment, the first transmission bandwidth of the first interface of the system interface device is smaller than the second transmission bandwidth of the second interface.

In one embodiment, the first interface is compatible with at least one of PCIe 1.0 and PCIe 2.0 protocol versions, and the second interface is compatible with PCIe 3.0 protocol version.

In one embodiment, the first communication protocol of the memory card is defined as a secure digital (SD) mode, and the second communication protocol of the memory card is defined as an SD Express mode.

In one embodiment, the secure digital mode is a protocol version prior to the quick secure digital mode, and the quick secure digital mode is a secure digital (SD) 7.0 protocol version.

In one embodiment, the data transmission rate of the first communication protocol of the memory card is less than the data transmission rate of the second communication protocol.

In one embodiment, when the memory card operates with the first communication protocol, the bridge generates the trigger signal to trigger the selector, and the first interface is electrically connected to the memory card via the bridge and the selector Interface, and the system interface device reads and writes the data of the memory card with the first communication protocol; and when the memory card operates with the second communication protocol, the bridge generates the trigger signal to trigger the selector, the The first sub-interface of the second interface is electrically connected to the memory card interface via the selector.

In one embodiment, when the memory card operates with the second communication protocol, the system The interface device scans the memory card interface with the second interface to determine whether the memory card is compatible with the Non-Volatile Memory Shortcut (NVMe) protocol; when the memory card is not compatible with the Non-Volatile Memory Shortcut Protocol, the The system interface device uses the first communication protocol to read and write the data of the memory card; when the memory card is compatible with the non-volatile memory shortcut protocol, the system interface device uses the first sub-interface of the second interface and the The second sub-interface uses the second communication protocol to read and write the data of the memory card.

In an embodiment, the bridge includes a control interface and a transmission interface, the control interface is connected to the memory card, and the transmission interface is connected to the selector.

The creative read-write control system uses the first interface and the second interface on the host side to enable the read-write control system to control the memory card with a larger transmission rate with the first interface with a smaller transmission bandwidth and transmit with a larger The second interface with wide bandwidth accesses the memory card with a larger transmission rate, solves the compatibility problem between the memory card and the read-write control system, and improves the flexibility of using the memory card. In addition, the first interface and the second interface of the host end are used to connect the first interface channel to the memory card via the control unit, the first sub-interface of the second interface is connected to the memory card via the control unit, and the first interface of the second interface The second sub-interface is directly connected to the memory card to reduce the production cost of the read-write control system.

100: storage unit

101: Integration of electronic devices

102: Power module

103a: First information

103b: Second information

104a: the first communication interface

104b: Second communication interface

106: Switcher

108a: the first controller

108b: second controller

110a: the first peripheral device

110b: Second peripheral device

112: power adapter

PT1: First Agreement

PT2: Second Agreement

S1~S6: Step

S10, S12, S14, S16, S18, S20, S22: steps

In order to more clearly explain the technical solutions in the authored embodiment, the following will briefly introduce the drawings needed in the description of the embodiment. Obviously, the drawings in the following description are only some embodiments of the creation, For those with ordinary knowledge in the technical field to which this creation belongs, other drawings can also be obtained based on these drawings.

FIG. 1 is a block diagram of a read-write control system according to this creative embodiment.

FIG. 2 is a flowchart showing the read-write control method of the read-write control system according to the first embodiment of the present invention.

FIG. 3 is a flowchart showing the read-write control method of the read-write control system according to the second embodiment of the present invention.

Please refer to the drawings, in which the same component symbols represent the same components or similar components. The principle of the present invention is illustrated by implementation in an appropriate computing environment. The following description is based on the illustrated specific embodiment of the creation, which should not be considered as limiting other specific embodiments of the creation that are not detailed here.

Refer to FIG. 1, which is a block diagram of a read-write control system according to an embodiment of the present invention. The read-write control system is used to control the reading and writing of data of a memory card 100, and includes a memory card interface 101, a system interface device 102, and a control unit 104.

As shown in FIG. 1, the memory card interface 101 is used to connect to the memory card 100. The system interface device 102 includes a first interface 106a and a second interface 106b, the second interface 106b includes a first sub-interface 106b1 and a second sub-interface 106b2, and the system interface device 102 passes the second sub-interface of the second interface 106b The interface 106b2 is electrically connected to the memory card interface 101. The control unit 104 is connected to the system interface device 102 and the memory card interface 101, and includes a bridge 200 and a selector 202. The bridge 200 is electrically connected to the first interface 106 a of the system interface device 102 and the memory card interface 101. The selector 202 is electrically connected to the second interface 106b of the system interface device 102, the bridge 200, and the memory card interface 101.

As shown in FIG. 1, when the memory card 100 operates with a first communication protocol, the memory card interface 101 is electrically connected to the bridge 200 via the selector 202, and the memory card interface 101 The first interface 106a of the system interface device 102 is electrically connected via the bridge 200. When the memory card 100 operates with a second communication protocol, the memory card interface 101 is electrically connected to the first sub-interface 106b1 and the second sub-interface 106b2 of the second interface 106b through the selector 202.

As shown in FIG. 1, in one embodiment, the memory interface 101 is, for example, a secure digital memory card (secure digital memory card) protocol, such as SD-UHS I, SD-UHS II, SD-UHS III, SD 7.0, etc. Version, but not limited to this. The system interface device 102 is, for example, a peripheral component interconnect express (PCIe) root complex component, which is used to connect the processor and the memory to a PCIe switching architecture composed of one or more switching devices, which can be set It is used in notebook computers, mobile phones, tablets, or other electronic devices with processors connected to memory. The control unit 104 is, for example, a control chip of a card reader or a control circuit, but it is not limited thereto.

As shown in FIG. 1, in an embodiment, the first sub-interface 106b1 of the second interface 106b includes a PCI Express Reset (PERST#) signal and a clock request operation signal (clock request, CLKREQ#) and reference clock differential pair signals (reference clock, REFCLK+, REFCLK-), in which the peripheral component interconnect reset (PERST#) signal is used to manage the reset operation of the second interface 106b; clock request operation signal (clock request, CLKREQ#) is used to request the reference clock to run; the reference clock differential pair signal (reference clock, REFCLK+, REFCLK-) is used to provide the reference clock. The second sub-interface 106b2 of the second interface 106b is used to perform data transmission/reception (TX/RX) between the interface device 102 and the memory card interface 101.

As shown in FIG. 1, in one embodiment, the bridge 200 includes a control interface 106c1 and a transceiving interface 106c2. The control interface 106c1 is connected to the memory card interface 101, and the transceiving interface 106c2 is connected to the selector 202. The control interface 106c1 includes a secure digital command (SD CMD) and a secure digital clock (SD CLK). Transmission interface 106c2 includes security Full digital data (secure digital data, SD DAT), for example, SD DAT 0~3, which includes 4 bits. The bridge 200 is used to convert the data transmission format between the first interface 106a of the system interface device 102 and the first communication protocol. In one embodiment, the selector 202 is, for example, a multiplexer.

As shown in FIG. 1, the system interface device 102 detects that the memory card interface 101 is electrically connected to the system interface device 102 and the control unit 104 through the first interface 106a, and the first interface of the memory card 100 A communication protocol is compatible with the first interface 106a, for example, the system interface device 102 establishes a data access communication link of the first communication protocol with the memory card 100 through the first interface 106a.

As shown in FIG. 1, the system interface device 102 initializes the memory card 100 with the first communication protocol through the first interface 106a. The initialization is, for example, the system interface device 102 provides power required for the operation of the memory card 100, the system interface device 102 transmits operation and access commands to the memory card 100, and the system interface is established through the memory card interface 101 A two-way communication letter between the device 102 and the memory card 100.

As shown in FIG. 1, the system interface device 102 determines whether the memory card 100 operates in the first communication protocol or the second communication protocol through the first interface 106a. When the memory card 100 operates with the first communication protocol, the system interface device 102 is electrically connected to the memory card 100 through the bridge 200 and the selector 202, so that the system interface device 102 uses the first interface 106a And the first communication protocol reads and writes the data of the memory card 100. When the memory card 100 operates with the second communication protocol, the system interface device 102 reads and writes the memory card with the second communication protocol through the first sub-interface 106b1 and the second sub-interface 106b2 of the second interface 106b. 100 of that information.

As shown in FIG. 1, in an embodiment, the first transmission bandwidth of the first interface 106a of the system interface device 102 is smaller than the second transmission bandwidth of the second interface 106b. The first interface 106a phase Containing at least one of peripheral component interconnect express (PCIe1.0) and PCIe2.0 protocol version, the second interface 106b is compatible with PCIe3.0 protocol version. For example, the transmission bandwidth of PCIe 1.0 is 2.5 GHz, the transmission bandwidth of PCIe 2.0 is 5.0 GHz, and the transmission bandwidth of PCIe 3.0 is 8.0 GHz. 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, and SD-UHS III protocol versions. The second communication protocol of the memory card 100 is defined as an SD Express mode. The secure digital mode is a protocol version prior to the secure digital mode. The secure digital mode is a secure digital (SD) version 7.0 protocol, for example, compatible with the secure digital (SD) version 7.0 protocol or a later updated protocol version. The data transmission rate of the first communication protocol of the memory card 100 is less than the data transmission rate of the second communication protocol.

As shown in FIG. 1, in an embodiment, when the memory card 100 operates with the first communication protocol, the bridge 200 generates the trigger signal 204 to trigger the selector 202, and the first interface 106a passes through the The bridge 200 and the selector 202 are electrically connected to the memory card 100, and the system interface device 102 reads and writes the data of the memory card 100 using the first communication protocol. When the memory card 100 operates with the second communication protocol, the bridge 200 generates the trigger signal 204 to trigger the selector 202, and the first sub-interface 106b1 of the second interface 106b is electrically connected through the selector 202 The memory card interface 101. For example, the bridge 200 generates a trigger signal 204 to trigger the selector 202 to transmit control information between the system interface device 102 and the memory card 100 through the first sub-interface 106b1 of the second interface 106b.

In one embodiment, when the memory card 100 operates with the first communication protocol, the bridge 200 generates a trigger signal 204 to trigger the selector 202 to transmit and receive the control interface 106c1 and the transmission interface 106c2 The control information and the data between the system interface device 102 and the memory card 100, wherein the secure digital command (SD CMD) and the secure digital clock (SD CLK) of the bridge 200 Used to establish a communication link between the bridge 200 and the memory card interface 101, the selector 202 outputs the data such as data (DAT 0~3), for example, outputs secure digital data (SD DAT 0~3) as data (DAT 0~3). When the memory card 100 operates with the second communication protocol, the bridge 200 generates a trigger signal 204 to trigger the selector 202 to transmit and receive the system interface device 102 through the first sub-interface 106b1 of the second interface 106b Control information with the memory card 100, the control information is, for example, a peripheral peripheral element reset reset (PCI Express Reset, PERST#) signal, a clock request operation signal (clock request, CLKREQ#), and a reference clock difference Pair signals (reference clock, REFCLK+, REFCLK-).

As shown in FIG. 1, in an embodiment, further, when the memory card 100 operates with the second communication protocol, the system interface device 102 scans the memory card interface 101 with the second interface 106b to determine Whether the memory card 110 is compatible with Non-Volatile Memory Express (NVMe) protocol. When the judgment is NO, it returns to step S306, the memory card 100 is not compatible with the NVMe protocol, and the system interface device 102 reads and writes the data of the memory card 100 using the first communication protocol. When the determination is yes, step S312 is executed, the memory card 100 is compatible with the NVMe protocol, and the system interface device 102 uses the first sub-interface 106b1 and the second sub-interface 106b2 of the second interface 106b to use the second communication Agreement to read and write the data of the memory card 100. The second sub-interface 106b2 of the second interface 106b is used to execute the data transmission/reception (TX/RX) between the interface device 102 and the memory card interface 101.

According to the above, the read-write control system of the present invention, through the first interface 106a and the second interface 106b, enables the read-write control system to control the memory card 100 with a larger transmission rate with the first interface 106a with a smaller transmission bandwidth, In addition, the second interface 106b with a larger transmission bandwidth accesses the memory card 100 with a larger transmission rate, which solves the compatibility problem between the memory card 100 and the read-write control system, and improves the flexibility of use of the memory card 100. The first interface 106a is connected to the memory card 100 via the control unit 104, so that the first sub-interface 106b1 of the second interface 106b is connected to the memory card 100 via the control unit 104, and the second interface The second sub-interface 106b2 of 106b is directly connected to the memory card 100 to reduce the production cost of the read-write control system.

Referring to FIG. 1 and FIG. 2, FIG. 1 is a block diagram showing a read-write control system according to this creative embodiment, and FIG. 2 is a read-write control system according to the first embodiment of the creative. Flow chart of the control method. The read-write control method is used for a read-write control system. The read-write control system includes a memory card interface 101, a system interface device 102, and a control unit 104. The system interface device 102 includes a first interface 106a and a second The interface 106b, the second interface 106b includes a first sub-interface 106a and a second sub-interface 106b, and is electrically connected to the memory card interface 101 via a second sub-interface 106b2 of the second interface 106b, and the control unit 104 is connected The system interface device 102 and the memory card interface 101, the control unit 104 includes a bridge 200 and a selector 202, the bridge 200 is electrically connected to the first interface 106 a of the system interface device 102 and the memory card Interface 101, the selector 202 is electrically connected to the second interface 106b of the system interface device 102, the bridge 200, and the memory card interface 101, the read-write control method includes the following steps:

In step S200, the system interface device 102 detects that the memory card interface 101 is connected to the system interface device 102 and the control unit 104, and the first communication protocol of the memory card 100 is compatible with the first interface 106a.

In step S202, the system interface device 102 determines whether the memory card 100 operates in the first communication protocol or the second communication protocol through the first interface 106a.

In step S204, when the memory card 100 operates with the first communication protocol, the system interface device 102 is electrically connected to the memory card interface 101 through the bridge 200 and the selector 202, so that the system interface device 102 The first interface 106a and the first communication protocol are used to read and write the data of the memory card 100.

In step S206, when the memory card 100 operates with the second communication protocol, the system The unified interface device 102 uses the second communication protocol to read and write the data of the memory card 100 through the first sub-interface 106b1 and the second sub-interface 106b2 of the second interface 106b.

Referring to FIG. 1 and FIG. 3, FIG. 3 is a flowchart illustrating the read-write control method of the read-write control system according to the second embodiment of the present invention.

In step S300, the system interface device 102 detects that the memory card interface 101 is connected to the system interface device 102 and the control unit 104 through the first interface 106a. The memory card 100 is compatible with the first The first communication protocol of the interface 106a.

In step S302, the system interface device 102 initializes the memory card 100 with the first communication protocol through the first interface 106a.

In step S304, the system interface device 102 determines whether the memory card 100 operates in the first communication protocol or the second communication protocol through the first interface 106a.

In step S306, when the memory card 100 operates with the first communication protocol, the bridge 200 generates the trigger signal to trigger the selector 202, and the first interface 106a is electrically connected via the bridge 200 and the selector 202. The memory card 100 is connected, and the system interface device 102 reads and writes the data of the memory card 100 using the first communication protocol.

In step S308, when the memory card 100 operates with the second communication protocol, the bridge 200 generates the trigger signal 204 to trigger the selector 202, and the first sub-interface 106b1 of the second interface 106b passes the selection The device 202 is electrically connected to the memory card interface 101.

In one embodiment, the first transmission bandwidth of the first interface 106a of the system interface device 102 is smaller than the second transmission bandwidth of the second interface 106b. The first interface 106a is compatible with at least one of peripheral component interconnect express (PCIe1.0) and PCIe2.0 protocol versions, and the second interface 106b is compatible with PCIe3.0 protocol versions. PCIe1.0 is 2.5GHz, PCIe2.0 series is 5.0GHz, PCIe3.0 series is 8.0GHz. 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, and SD-UHS III protocol versions. The second communication protocol of the memory card 100 is defined as an SD Express mode. The secure digital mode is a protocol version prior to the secure digital mode. The secure digital mode is a secure digital (SD) version 7.0 protocol, for example, compatible with the secure digital (SD) version 7.0 protocol or a later updated protocol version. The data transmission rate of the first communication protocol of the memory card 100 is less than the data transmission rate of the second communication protocol.

In step S310, when the memory card 100 operates with the second communication protocol, the system interface device 102 scans the memory card interface 101 with the second interface 106b to determine whether the memory card 110 is compatible with non-volatile Non-Volatile Memory Express (NVMe) agreement.

When the determination is negative, the process returns to step S306. When the memory card 102 is not compatible with the Non-Volatile Memory Express (NVMe) protocol, the system interface device 102 reads and writes the data of the memory card 100 using the first communication protocol.

When the determination is yes, step S312 is executed. When the memory card 102 is compatible with the Non-Volatile Memory Shortcut (NVMe) protocol, the system interface device 102 uses the first sub-interface 106b1 of the second interface 106b and the second The sub-interface 106b2 uses the second communication protocol to read and write the data of the memory card 100.

In one embodiment, the first interface 106a includes a first control line 106a1 and a first transmission/reception line 106a2. The first control line 106a1 and the first transmission/reception line 106a2 are connected to the bridge 200. In one embodiment, the channel 106c includes a control interface 106c1 and a transceiving interface 106c2, the control interface 106c1 is connected to the memory card 100, and the transceiving interface 106c2 is connected to the selector 202.

In summary, the read-write control system of this creation uses the first interface and the second interface on the host side to enable the read-write control system to control a larger transmission rate with the first interface with a smaller transmission bandwidth The memory card with a larger transmission bandwidth is accessed by a second interface with a larger transmission bandwidth, which solves the compatibility problem between the memory card and the read-write control system and improves the flexibility of use of the memory card. In addition, the first interface and the second interface of the host end are used to connect the first interface channel to the memory card via the control unit, the first sub-interface of the second interface is connected to the memory card via the control unit, and the first interface of the second interface The second sub-interface is directly connected to the memory card to reduce the production cost of the read-write control system.

Although this creation has been disclosed as above with the preferred embodiments, it is not intended to limit this creation. Those with ordinary knowledge in the technical field to which this creation belongs can make various modifications and changes without departing from the spirit and scope of this creation. Retouching, therefore the scope of protection of this creation shall be subject to the scope defined in the attached patent application.

100: memory card

101: Memory card interface

102: System interface device

104: control unit

106a: the first interface

106b: Second interface

106b1: the first sub-interface

106b2: Second sub-interface

106c1: control interface

106c2: Transmission interface

200: bridge

202: selector

204: trigger signal

DAT 0~3: data

SD DAT 0~3: Secure digital data

SD CMD: Safe digital instructions

SD CLK: Safe digital clock

TX/RX: data transmission/reception

PERST#: Fast reset signal for interconnection of peripheral components

CLKREQ#: clock request running signal

REFCLK+, REFCLK-: reference clock differential pair signal

Claims (12)

A reading and writing control system for controlling the reading and writing of data of a memory card. The reading and writing control system includes: A memory card interface for connecting the memory card; A system interface device includes a first interface and a second interface, the second interface includes a first sub-interface and a second sub-interface, and the system interface device passes the second sub-interface of the second interface to Electrically connected to the memory card interface; and A control unit, connected to the system interface device and the memory card interface, includes: A bridge electrically connected to the first interface and the memory card interface of the system interface device; and A selector electrically connected to the second interface of the system interface device, the bridge, and the memory card interface; Wherein, when the memory card operates with a first communication protocol, the memory card interface is electrically connected to the bridge via the selector, and the memory card interface is connected to the first of the system interface device via the bridge One interface electrical connection; Wherein, when the memory card operates with a second communication protocol, the memory card interface is electrically connected to the first sub-interface of the second interface through the selector. The read-write control system as described in item 1 of the patent application scope, wherein the system interface device detects that the memory card interface is electrically connected to the system interface device and the control unit through the first interface, and the memory card The first communication protocol is compatible with the first interface. The read-write control system as described in item 1 of the patent application scope, wherein the system interface device initializes the memory card with the first communication protocol through the first interface. The read-write control system as described in item 1 of the patent application scope, wherein when the memory card operates with the first communication protocol, the system interface device is electrically connected to the memory card interface through the bridge and the selector, The system interface device uses the first interface and the first communication protocol to read and write the data of the memory card. The read-write control system as described in item 1 of the patent application scope, wherein when the memory card operates with the second communication protocol, the system interface device passes through the first sub-interface and the second sub-interface of the second interface, Use the second communication protocol to read and write the data of the memory card. The read-write control system as described in item 1 of the patent application scope, wherein the first transmission bandwidth of the first interface of the system interface device is smaller than the second transmission bandwidth of the second interface. The read-write control system as described in item 1 of the patent application scope, wherein the first interface is compatible with at least one of PCIe1.0 and PCIe2.0 protocol versions, and the second interface is compatible with PCIe3.0 protocol version. The read-write control system as described in item 1 of the patent application scope, wherein the first communication protocol of the memory card is defined as a secure digital (SD) mode, and the second communication protocol of the memory card is defined as a fast and secure digital (SD) Express) mode. The read-write control system as described in item 8 of the patent application scope, wherein the secure digital (SD) mode is a protocol version prior to the fast secure digital mode, and the fast secure digital mode is the secure digital (SD) version 7.0 protocol. The read-write control system as described in item 1 of the patent application scope, wherein the data transmission rate of the first communication protocol of the memory card is less than the data transmission rate of the second communication protocol. The read-write control system as described in item 1 of the patent application scope, in which: When the memory card operates with the first communication protocol, the bridge generates the trigger signal to trigger the selector, the first interface is electrically connected to the memory card interface through the bridge and the selector, and the system interface The device uses the first communication protocol to read and write the data of the memory card; and When the memory card operates with the second communication protocol, the bridge generates the trigger signal to trigger the selector, and the first sub-interface of the second interface is electrically connected to the memory card interface via the selector. The read-write control system as described in item 1 of the patent application scope, wherein the bridge includes a control interface and a transmission and reception interface, the control interface is connected to the memory card, and the transmission and reception interface is connected to the selector.

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