TWI717884B - Control system of accessing data for memory cards and method thereof - Google Patents

Abstract

A control system of accessing data and method thereof for memory cards are provided. The control system includes a memory card interface, a host system interface, and a control device. When a memory card operates in a first communication protocol, the memory card interface electrically connects to the host system interface via a second selector, a bridge device, and a first selector. When a memory card operates in a second communication protocol, the memory card interface electrically connects to the host system interface via the second selector, and the memory card interface electrically connects to the host system interface via the first selector.

Description

Read and write control system and method of memory card

The present invention relates to an electronic device and a method thereof, in particular to a read-write control system and method of a memory card.

With the rapid development of information technology, the application of electronic products has become increasingly popular, such as handheld electronic devices such as notebook computers, mobile phones, and tablet computers. Since these electronic devices are characterized by being portable and used anytime and anywhere, and in order to allow various electronic devices to be connected to each other for a larger amount of data transmission, the memory card is usually inserted into the card reader to make the above The electronic product can read and write 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, it is impossible to access the memory card of the newer version with the control method of the older version. As a result, the memory card of the newer specification cannot be read in the older version. The use in a card machine causes compatibility problems between the memory card and the card reader control chip, and reduces the flexibility of 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 the chip The inter-communication design is more complicated, which increases the cost of the control chip. In view of this, there is still a need to develop a new type of electronic device and method to improve the above problems.

One of the objects of the present invention is to provide a memory card read-write control system and method thereof. With the control module of the control device and the first selector, the host system can read and write through different communication protocols through only one interface. The data of the memory card solves the compatibility problem between the memory card and the read-write control system, improves the flexibility of the memory card, and reduces the production cost of the read-write control system.

In order to achieve the above object, the read-write control system in one embodiment of the present invention is used to control the read and write of data on a memory card. The read-write control system includes: a memory card interface for connecting the memory card; The host system interface is electrically connected to the memory card interface, and the host system is connected to the host system interface; and a control device including a control module and a first selector, the control module is electrically connected to the memory card interface , The host system interface and the first selector, the first selector is electrically connected to the memory card interface and the host system interface, the control module includes: a bridge device electrically connected to the host system interface and the memory Card interface and the first selector; and a second selector electrically connected to the host system interface, the memory card interface, and the bridge device; wherein, when the memory card operates under a first communication protocol, the memory The card interface is electrically connected to the host system interface through the second selector, the bridge device, and the first selector; wherein, when the memory card operates with a second communication protocol, the memory card interface is Two selectors are electrically connected to the host system interface, and the memory card interface is also electrically connected to the host system interface through the first selector.

In one embodiment, the control device detects that the memory card is electrically connected to the memory card interface, and is connected to the memory card by the first communication protocol by default, and activates the memory card by the first communication protocol.

In one embodiment, the bridge device includes: a first interface electrically connected to the host system interface and the first selector; and a second interface electrically connected to the memory card interface, the first interface and the A second selector; wherein, when the memory card operates with the first communication protocol, the memory card interface passes through the second selector, the second interface, and the first interface, and passes through the first interface of the control device The selector is electrically connected to the host system interface, wherein the transmission path between the memory card interface, the second interface, the first interface, and the host system interface is defined as a first transmission path. The memory card interface, The transmission path between the second selector, the second interface, the first interface, the first selector, and the host system interface is defined as a second transmission path, allowing the host system to communicate with each other through the first transmission path The memory card interface communicates and reads and writes the data of the memory card using the first communication protocol through the second transmission path; wherein, when the memory card operates under the second communication protocol, the memory card interface passes through the second communication protocol. The selector and the first interface are electrically connected to the host system interface, and the memory card interface is electrically connected to the host system interface through the first selector of the control device, wherein the memory card interface, The transmission path between the second selector and the host system interface is defined as a third transmission path, and the transmission path between the memory card interface, the first selector and the host system interface is defined as a fourth transmission path, so 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 using the second communication protocol.

In one embodiment, the host system interface includes a first sub-interface and a second sub-interface, and the first selector includes a first transmitting and receiving end and a second transmitting and receiving end. When the memory card uses the first When a communication protocol is in operation, the host system triggers the first transmission/receiving end of the first selector with a first trigger signal through the host system interface, so that the memory card interface through the bridge device and the first transmission/reception The terminal is electrically connected to the second sub-interface of the host system interface, and the memory card interface is also electrically connected to the first sub-interface of the host system interface through the second selector and the bridge device.

In one embodiment, when the memory card operates under the second communication protocol, the second interface triggers the second selector with a second trigger signal so that the memory card interface is electrically connected through the second selector The first sub-interface is connected to the host system interface, and the host system triggers the second transmitting and receiving end of the first selector with the first trigger signal through the host system interface, so that the memory card interface can pass through the first trigger signal The second transmitting end is electrically connected to the second sub-interface of the host system interface.

In one embodiment, when the memory card operates under the second communication protocol, the host system interface disconnects the first transmitting and receiving end of the first selector.

In one embodiment, the host system communicates with the memory card through the host system interface, the second transmitting and receiving end of the first selector, and the second selector to determine whether the memory card supports the host system Protocol version, which includes PCIe1.0, PCIe2.0 and PCIe3.0 protocol versions.

In one embodiment, when the host system confirms through the host system interface that the first communication protocol of the memory card supports the PCIe1.0 protocol version or PCIe2.0 protocol version of the host system, the host system uses the host system The interface and the first transmitting and receiving end of the first selector read and write the data of the memory card, when the host system confirms through the host system interface that the second communication protocol of the memory card supports PCIe3.0 of the host system Protocol version, the host system reads and writes the data of the memory card through the host system interface and the second transmitting and receiving end of the first selector.

In one embodiment, the bridge device further includes a non-volatile memory shortcut protocol controller, electrically connected to the first selector through the first interface, and electrically connected to the second sub-interface of the host system interface Connection, when the memory card does not support the operation of the second communication protocol, the host system accesses the data of the memory card through the host system interface and the non-volatile memory shortcut protocol controller, when the memory card supports the second communication protocol During the operation of the second communication protocol, a non-volatile memory shortcut (NVMe) protocol driver of the host system accesses the data of the memory card through the host system interface and the second transmitting and receiving end of the first selector.

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 a fast secure digital (SD Express) mode.

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

A read-write control system in another embodiment of the present invention is used to control the read and write of data on a memory card. The read-write control system includes: a first transmission path connected to a memory card interface, a bridge device, and Between a host system interface, where the memory card interface is used to connect the memory card; a second transmission path is connected to the memory card interface, a second selector, the bridge device, a first selector, and the host Between the system interfaces; a third transmission path connected between the memory card interface, the second selector and the host system interface; and a fourth transmission path connected between the memory card interface and the first selector And the host system interface; wherein, when the memory card operates with the first communication protocol, the host system communicates with the memory card interface through the host system interface through the first transmission path and through the second transmission The path uses the first communication protocol to read and write the data of the memory card; wherein, when the memory card operates with the second communication protocol, the host system communicates with the memory card through the third transmission path through the host system interface Interface communication and read and write the data of the memory card through the fourth transmission path using the second communication protocol.

In one embodiment, the host system interface includes a first sub-interface and a second sub-interface, the bridge device includes a first interface and a second interface, and the first selector includes a first transmitting and receiving end and A second transmitting and receiving end. When the memory card operates under the first communication protocol, the host system triggers the first transmitting and receiving end of the first selector with a first trigger signal via the host system interface to allow The memory card interface is electrically connected to the second sub-interface of the host system interface through the bridge device and the first transmitting and receiving end, and the memory card interface is also electrically connected to the host system through the second selector and the bridge device The first sub-interface of the interface.

In one embodiment, when the memory card operates under the second communication protocol, the second interface triggers the second selector with a second trigger signal so that the memory card interface is electrically connected through the second selector The first sub-interface of the host system interface is connected, and the host system interface triggers the second transmitting and receiving end of the first selector with the first trigger signal, so that the memory card interface can pass through the second transmitting and receiving end The second sub-interface of the host system interface is electrically connected.

In one embodiment, when the memory card operates under the second communication protocol, the host system interface disconnects the first transmitting and receiving end of the first selector.

In another embodiment of the present invention, the read-write control method is provided for a host system to read and write a memory card through the read-write control system for a read-write control system. The read-write control system includes a memory card interface, a A host system interface and a control device. The control device includes a control module and a first selector. The control module includes a bridge device and a second selector. The bridge device includes the first interface and a second selector. Interface, the host system interface includes a first sub-interface and a second sub-interface, the first selector includes a first transmitting and receiving end and a second transmitting and receiving end, the read-write control method includes the following steps:

The host system triggers the first transmitting/receiving end of the first selector with a first trigger signal via the host system interface, the host system via the host system interface, the first transmitting/receiving end of the first selector, and The control module is electrically connected to the memory card interface;

Detecting that the memory card is connected to the memory card interface, and connecting with the memory card using a first communication protocol;

Determine whether the memory card supports the operation of a second communication protocol;

When it is determined that the memory card does not support the operation of the second communication protocol, the memory card interface is electrically connected to the host system interface via the second selector, the bridge device, and the first selector, so that the host system Read and write the data of the memory card through the host system interface using the first communication protocol;

When it is determined that the memory card supports the second communication protocol operation, the memory card interface is electrically connected to the host system interface through the second selector, and the memory card interface is also connected to the host system through the first selector The interface is electrically connected, and the host system uses the second communication protocol to read and write the data of the memory card with the second transmitting and receiving end of the first selector of the control device through the host system interface.

In one embodiment, after the host system interface detects that the memory card is connected to the memory card interface, it further includes the second interface generating a second trigger signal to trigger the second selector.

In one embodiment, after the step of detecting that the memory card is connected to the memory card interface, the host system communicates with the first interface and the second interface of the bridge device through the host system interface, using the first communication protocol The memory card is activated, and when it is determined that the memory card supports the operation of the second communication protocol, the memory card is activated using the second communication protocol.

In one embodiment, when the memory card operates under the second communication protocol, the second interface triggers the second selector with a second trigger signal so that the memory card interface is electrically connected through the second selector The first sub-interface is connected to the host system interface.

In one embodiment, when the memory card operates under the second communication protocol, the host system triggers the second transmitting and receiving end of the first selector with a first trigger signal through the host system interface, so that the The memory card interface is electrically connected to the second sub-interface of the host system interface through the second transmitting and receiving end.

In one embodiment, when the memory card operates under the second communication protocol, the host system interface disconnects the first transmitting and receiving end of the first selector.

In one embodiment, the host system communicates with the memory card through the host system interface, the second transmitting and receiving end of the first selector, and the second selector to determine whether the memory card supports the host system Protocol version, which includes PCIe1.0, PCIe2.0 and PCIe3.0 protocol versions.

In one embodiment, when it is confirmed that the first communication protocol of the memory card supports the PCIe1.0 protocol version or the PCIe2.0 protocol version of the host system interface, the host system communicates with the first selector through the host system interface When it is confirmed that the second communication protocol of the memory card supports the PCIe3.0 protocol version of the host system, the host system communicates with the first host system through the host system interface. The second transmitting and receiving end of the selector reads and writes the data of the memory card.

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 a fast secure digital (SD Express) mode.

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

In one embodiment, the bridge device further includes a non-volatile memory shortcut protocol controller, which is electrically connected to the first selector through the first interface, and is electrically connected to the first sub-interface of the host system interface. Connection, when the memory card does not support the operation of the second communication protocol, the host system accesses the data of the memory card through the host system interface and the non-volatile memory shortcut protocol controller, when the memory card supports the second communication protocol During the operation of the second communication protocol, a non-volatile memory shortcut (NVMe) protocol driver of the host system accesses the data of the memory card through the host system interface and the second transmitting and receiving end of the first selector.

The read-write control system and method of the present invention use the control module of the control device and the first selector, so that the host system can read and write the data of the memory card with different communication protocols through only one interface, thus solving the problem of the memory card Compatibility issues with the read-write control system, and improve the flexibility of the memory card, while reducing the production cost of the read-write control system.

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 exemplified by being implemented in a suitable computing environment. The following description is based on the illustrated specific embodiments of the present invention, which should not be regarded as limiting other specific embodiments of the present invention that are not described in detail herein.

Refer to Figure 1, which is a block diagram of the read-write control system according to the first embodiment of the present invention. The read-write control system is used for a host system 103 to read and 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 104.

As shown in FIG. 1, the memory card interface 101 is used to connect 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 104 is connected between the memory card interface 101 and the host system interface 102. The control device 104 includes a control module 106 and a first selector 108. The control module 106 is electrically connected to the memory card interface 101, the host system interface 102 and the first selector 108. The first selector 108 is electrically connected The memory card interface 101 and the host system interface 102 are sexually connected. The control module 106 includes a bridge device 109 and a second selector 114. The bridge device 109 is electrically connected to the host system interface 102, the memory card interface 101, and the first selector 108. The second selector 114 is electrically connected Connect the host system interface 102, the memory card interface 101 and the bridge device 109. Wherein, when the memory card 100 operates under the first communication protocol, the memory card interface 101 is electrically connected to the host system interface 102 via the second selector 114, the bridge device 109, and the first selector 108. When the memory card 100 operates under the second communication protocol, the memory card interface 101 is electrically connected to the host system interface 102 through the second selector 114, and the memory card interface 101 is also connected through the first selector 101 It is electrically connected to the host system interface 102.

As shown in Figure 1, in one 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 104, and communicates with the memory card through the first communication protocol 100 is connected, and the memory card 100 is initialized or started (Initialization process) according to the first communication protocol. The initialization is, for example, that the host system interface 102 provides the power required for operation of the memory card 100, the host system interface 102 transmits operation and access commands to the memory card 100, and establishes the host system through the memory card interface 101 Two-way communication between the interface 102 and the memory card 100. As shown in FIG. 1, in one embodiment, the bridge device 109 includes a first interface 110 and a second interface 112. The first interface 110 is electrically connected to the host system interface 102 and the first selector 108, and the second interface 112 is electrically connected to the memory card interface 101, the first interface 110 and the second selector 114.

As shown in Fig. 1, in one embodiment, when the memory card 100 operates under the first communication protocol, and the first communication protocol of the memory card 100 is, for example, a secure digital (SD) mode, the memory card The interface 101 can be electrically connected to the host system interface 102 via the second selector 114, the second interface 110, and the first interface 112, and via the first selector 108 of the control device 104, wherein the The transmission path between 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 memory card interface 101, the second selector 114, and the second The transmission path between the interface 112, the first interface 110, the first selector 108, and the host system interface 102 is defined as a second transmission path P2, so that the host system interface 102 can communicate with the memory through the first transmission path P1 The card interface 101 communicates and reads and writes the data of the memory card 100 through the second transmission path P2 using the first communication protocol. In one embodiment, the host system interface 102 detects that the memory card interface 101 is electrically connected to the host system interface 102 via the first transmission path P1. The host system interface 102 initializes the memory card 100 with the first communication protocol via the first transmission path P1. In a preferred embodiment, in the process of detecting the connection of the memory card 100, the host system 103 uses the host system interface 102 and the first interface 110 and the second interface 112 of the bridge device 109, for example, to The first communication protocol initializes or activates the memory card 100.

As shown in Figure 1, in one embodiment, when the memory card 100 operates by the second communication protocol, for example, when the second communication protocol of the memory card 100 is the SD Express mode, the memory The card interface 101 is electrically connected to the host system interface 102 through the second selector 114, and the memory card interface 101 is electrically connected to the host system interface 102 through the first selector 108 of the control device 104, The transmission path between the memory card interface 101, the second selector 114 and the host system interface 102 is defined as a third transmission path P3, and the transmission path between the memory card interface 101, the first selector 108 and the host system interface 102 The transmission path is defined as the fourth transmission path P4, so that the host system interface 102 communicates with the memory card interface 101 through the third transmission path P3 and reads and writes the memory through the fourth transmission path P4 using the second communication protocol Card 100 of the information. Wherein, after determining that the memory card 100 supports the operation of the second communication protocol, in this embodiment, for example, the memory card 100 is initialized or started (Initialization process) with the second communication protocol, and then the subsequent communication or reading is performed. Write homework.

As shown in Figure 1, in one embodiment, the memory interface 101 is, for example, a 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. 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 a fast and secure digital (SD Express) mode. The secure digital mode is the previous protocol version of the fast secure digital mode, and the fast secure digital mode is the secure digital (SD) 7.0 protocol version, for example, it supports the secure digital (SD) 7.0 protocol version or the protocol version updated later. The data transmission rate of the first communication protocol of the memory card 100 is lower 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 component, which is used to connect the processor and memory to a PCIe switching architecture composed of one or more switching devices. In notebook computers, mobile phones, tablet computers, or other electronic devices connected to the processor and memory. The control device 104 is, for example, a control chip or a control circuit of a card reader, but is not limited thereto.

As shown in Figure 1, in one embodiment, the host system interface 102 includes a first sub-interface 102a and a second sub-interface 102b, and the first selector 108 includes a first transmitting and receiving end FT and a second transmitting and receiving end ST. For example, the first sub-interface 102a includes a PCI Express Reset (PERST#) signal, a clock request operation signal (clock request, CLKREQ#), and a reference clock differential pair signal (reference clock, REFCLK+) signal. , REFCLK-), where the shortcut peripheral component interconnection reset (PERST#) signal is used to manage the reset operation of the second sub-interface 102b; the clock request operation signal (clock request, CLKREQ#) is used to request the reference clock operation; The reference clock differential pair signal (reference clock, REFCLK+, REFCLK-) is used to provide the reference clock. The first sub-interface 102a is electrically connected to the first interface 110 of the bridge device 109 and the second selector 114 for transmitting the above-mentioned four signals, including PERST#, CLKREQ#, REFCLK+, and REFCLK- 4 signals. The second sub-interface 102b is used to execute data transmission/receive (TX/RX) between the interface device 102 and the memory card interface 101. The second sub-interface 102b supports PCIe1.0, PCIe2.0 and PCIe3.0 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 8.0GHz. The first transmitting and receiving terminal FT is, for example, a low-speed transmitting and receiving terminal, and the second transmitting and receiving terminal ST is, for example, a high-speed transmitting and receiving terminal, but not limited to this, such as the first transmitting and receiving terminal FT and the second transmitting and receiving terminal ST. Have different transmission bandwidths.

As shown in Figure 1, in one embodiment, when the memory card 100 operates under the first communication protocol, the host system interface 102 triggers the first transfer of the first selector 108 with the first trigger signal TS1. The receiving end FT allows the memory card interface 101 to be electrically connected to the second sub-interface 102b of the host system interface 102 through the bridge device 109 and the first transmitting and receiving end FT, and the memory card interface 101 also passes through the second The selector 114 and the bridge device 109 are electrically connected to the first sub-interface 102 a of the host system interface 102. The first transmitting and receiving end FT is, for example, a low-speed transmitting and receiving end, but not limited to this. For example, the first transmitting and receiving end FT and the second transmitting and receiving end ST have different transmission bandwidths.

As shown in Figure 1, in one embodiment, when the memory card 100 operates under the second communication protocol, the second interface 112 of the bridge device 109 triggers the second selector 114 with a second trigger signal TS2. So that the memory card interface 101 is electrically connected to the first sub-interface 102a of the host system interface 102 through the second selector 114, and the host system interface 102 triggers the first selector 108 with the first trigger signal TS1 The second transmitting and receiving end ST of the memory card interface 101 is electrically connected to the second sub-interface 102b of the host system interface 102 through the second transmitting and receiving end ST. In one embodiment, when the memory card 100 operates under the second communication protocol, the host system interface 102 disconnects the first transmitting and receiving terminal FT of the first selector 108.

As shown in Fig. 1, the host system 103 scans the memory card 100 via the host system interface 102 through the second transmitting and receiving end ST of the first selector 108 and the second selector 114 to determine Whether the memory card 100 supports the protocol version of the host system interface 102, the protocol version includes PCIe1.0, PCIe2.0, and PCIe3.0 protocol versions. When it is confirmed that the first communication protocol of the memory card 100 supports the PCIe1.0 protocol version or the PCIe2.0 protocol version of the host system interface 102, the host system 103 will, for example, pass the host system interface 102 through the first selection The first transmitting and receiving end FT of the device 114 reads and writes the data of the memory card 100. When it is confirmed that the second communication protocol of the memory card 100 supports the PCIe3.0 protocol version of the host system interface 102, the host system 103, for example, will pass the second transmission of the first selector 108 through the host system interface 102. The receiving end ST reads and writes the data of the memory card 100.

As shown in Figure 1, in one embodiment, the second interface 112 of the bridge device 109 includes a control interface 112a and a transmission interface 112b. The control interface 112a is connected to the memory card interface 101, and the transmission and reception interface 112b is connected to the The second selector 114. The control interface 112a includes signals such as a secure digital command (SD CMD) and a secure digital clock (SD CLK) for establishing a communication link between the second interface 112 and the memory card interface 101. The transmitting and receiving interface 112b includes secure digital data (SD DAT), such as SD DAT 0~3, which includes 4 bits for transmitting and receiving data between the second interface 112 and the memory card interface 101. The control interface 112a and the receiving interface 112b of the second interface 112 are respectively used to convert the communication and data transmission format 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 second selector 114 is, for example, a multiplexer, but is not limited thereto, for example, a selector formed by combining circuit elements or logic elements. In one embodiment, the second interface 112 is, for example, the main controller of the SD-UHS I.

As shown in FIG. 1, in one embodiment, the read-write control system is used to control the reading and writing of data on a memory card 100, and the read-write control system includes a first transmission path P1, a second transmission path P2, and a third Transmission path P3 and fourth transmission path P4. The first transmission path P1 is connected between a memory card interface 101, a bridge device 109 and a host system interface 102, wherein the memory card interface 101 is used to connect the memory card 100. The second transmission path P2 is connected between the memory card interface 101, a second selector 114, the bridge device 109, a first selector 108, and the host system interface 102. The third transmission path P3 is connected between the memory card interface 101, the second selector 114 and the host system interface 102. The fourth transmission path P4 is connected between the memory card interface 101, the first selector 108 and the host system interface 102. Wherein, when the memory card 100 operates with the first communication protocol, the host system 103 communicates with the memory card interface 101 through the first transmission path P1 and reads with the first communication protocol through the second transmission path P2 Write the data of the memory card 100. Wherein, when the memory card 100 operates with the second communication protocol, the host system 103 communicates with the memory card interface 101 through the third transmission path P3 and reads with the second communication protocol through the fourth transmission path P4 Write the data of the memory card 100.

Figure 2 is a block diagram of the read-write control system according to the second embodiment of the present invention. The read-write control system in Figure 2 is similar to the read-write control system in Figure 1. The difference lies in the second interface 112 and the first A non-volatile memory shortcut (NVMe) protocol controller 200 is also arranged between an interface 110. When the host system 103 confirms that the memory card 100 supports the first communication protocol, for example, it supports the PCIe1.0 protocol version or the PCIe2.0 protocol version of the host system interface 102, the host system 103 passes through the host system interface 102 The first transmitting and receiving terminal FT of the first selector 108 reads and writes the data of the memory card 100 via the first interface 110, the NVMe controller 200 and the second interface 112. When the host system interface 102 confirms that the memory card 100 supports the second communication protocol, for example, it supports the PCIe3.0 protocol version of the host system interface 102, a non-volatile memory shortcut (NVMe) protocol in the host system 103 The driver can read and write the data of the memory card 100 through the second transmitting and receiving end ST of the first selector 108.

According to the above, the read-write control system of the present invention uses the control module 106 of the control device 104 and the first selector 108 so that the host system 103 can support different communication protocols to read and write the memory card 100 through only one interface. The data, which solves the compatibility problem between the memory card 100 and the read-write control system, improves the flexibility of the memory card 100, and reduces the production cost of the read-write control system.

Referring to Fig. 1 and Fig. 3, Fig. 3 is a flow chart of the method for reading and writing control according to the first embodiment of the present invention. The read-write control method is used in a read-write control system for the host system 103 to read and write the memory card 100 through the read-write control system. The read-write control system includes a memory card interface 101, a host system interface 102, and a control device 104. The control device 104 includes a control module 106 and a first selector 108. The control module 106 includes a first Interface 110, a second interface 112, and a second selector 114. The host system interface 102 includes a first sub-interface 102a and a second sub-interface 102b. The first selector 108 includes a first transmitting and receiving terminal FT and a second The second transmission receiving end ST, the read-write control method includes the following steps:

In step S300, the host system 103 triggers the first transmitting and receiving end FT of the first selector 108 via the host system interface 102 with the first trigger signal TS1, and the host system 103 via the host system interface 102, the first The first transmitting and receiving end FT of the selector 108 and the control module 106 are electrically connected to the memory card interface 101.

In step S302, it is detected that the memory card 100 is connected to the host system interface 102 and the control device 104. In one embodiment, the host system 103 is connected to the memory card 100 using a first communication protocol.

In step S304, it is determined whether the memory card 100 supports the operation of a second communication protocol.

In step S306, when it is determined that the memory card 100 does not support the operation of the second communication protocol (that is, the memory card 100 operates under the first communication protocol), the memory card interface 101 passes through the second selector 114, The bridge device 109 and the first selector 108 are electrically connected to the host system interface 102, so that the host system 103 can read and write the data of the memory card 100 through the host system interface 102 using the first communication protocol.

In step S308, when it is determined that the memory card 100 supports the second communication protocol operation, the memory card interface 101 is electrically connected to the host system interface 102 through the second selector 114, and the memory card interface 101 is also The first selector 108 is electrically connected to the host system interface 102, and the host system 103 passes through the host system interface 102 and the second transmitting and receiving end ST of the first selector 108 of the control device 104 to The second communication protocol reads and writes the data of the memory card 100.

Referring to FIG. 1 and FIG. 4, FIG. 4 is a flowchart of a method for reading and writing control according to the second embodiment of the present invention. For a read-write control system, the read-write control system includes a memory card interface 101, a host system interface 102, and a control device 104. The control device 104 includes a control module 106 and a first selector 108. The module 106 includes a first interface 110, a second interface 112, and a second selector 114. The host system interface 102 includes a first sub-interface 102a and a second sub-interface 102b. The first selector 108 includes a first The first transmission receiving terminal FT and the second transmitting receiving terminal ST, the read-write control method includes the following steps:

In step S400, the host system 103 triggers the first transmitting and receiving end FT of the first selector 108 through the host system interface 102 with the first trigger signal TS1, and the host system interface 102 passes through the second selector 108 of the first selector 108. The receiving terminal FT and the control module 106 are electrically connected to the memory card interface 101.

In step S402, it is detected that the memory card 100 is electrically connected to the memory card interface 101. In this embodiment, for example, the first communication protocol is used to connect with the memory card 100. In a preferred embodiment, the control device 104 detects that the memory card 100 is electrically connected to the memory card interface 101. The control device 104 can send detection messages to the host system 103, for example. Any action that detects that the memory card 100 is electrically connected to the memory card interface 101 is within the spirit and scope of this disclosure, and this article does not make any restrictions.

In step S404, the second interface 112 generates a second trigger signal TS2 to trigger the second selector 114.

In step S406, the memory card 100 is initialized or started (Initialization process) using the first communication protocol. In one embodiment, the host system 103 can initialize or activate the memory card 100 through the first interface 110 and the second interface 112 of the bridge device 109 of the control module 106, for example. In other embodiments, the control module 106 can also use the first communication protocol to initialize or activate the memory card 100 through the first interface 110 and the second interface 112 of the bridge device 109. Any actions to initialize or activate the memory card 100 using the first communication protocol are within the spirit and scope of the disclosure, and this article does not make any restrictions here.

In step S408, it is determined whether the memory card 100 supports the operation of the second communication protocol. In one embodiment, the host system 103 can use the host system interface 102 to determine whether the memory card 100 supports the operation of the second communication protocol through the first transmitting and receiving end FT of the first selector 108. In other embodiments, for example, the control module 106 can determine whether the memory card 100 supports the operation of the second communication protocol. Any technology for determining whether the memory card 100 supports the operation of the second communication protocol falls within the spirit and scope of this disclosure, and this article does not make any restrictions here. It is worth mentioning that, after determining that the memory card 100 supports the operation of the second communication protocol, for example, the memory card is initialized or activated (Initialization process) by the second communication protocol.

In step S410, when it is determined that the memory card 100 supports the second communication protocol operation, the second interface 112 triggers the second selector 114 with the second trigger signal TS2 so that the memory card interface 101 can pass through the second The two selectors 114 are electrically connected to the first sub-interface 102a of the host system interface 102. In one embodiment, the first sub-interface 102a supports the PCIe 3.0 protocol version, for example.

In step S412, when the memory card 100 operates under the second communication protocol, the host system interface 102 triggers the first selector 108 and the second transmitting and receiving terminal ST with the first trigger signal TS1, so that the memory The card interface 101 is electrically connected to the second sub-interface 102b of the host system interface 102 through the second transmitting/receiving terminal ST. In one embodiment, the second sub-interface 102b supports a PCIe3.0 protocol version, for example.

In step S414, when the memory card 100 operates under the second communication protocol, the host system interface 102 disconnects the first transmitting and receiving end FT of the first selector 108. The first transmitting and receiving end FT is, for example, Support PCIe1.0 and PCIe2.0 protocol version.

In step S416, the host system interface 102 communicates with the memory card 100 through the second transmitting and receiving terminal ST of the first selector 108 and the control interface 112a of the second selector 114 to determine whether the memory card 100 is The protocol version of the host system 103 is supported. The protocol version includes PCIe1.0, PCIe2.0 and PCIe3.0 protocol versions.

After step S408, if it is determined that the memory card 100 does not support the operation of the second communication protocol, step S418 is performed. That is, in step S418, the host system 103 confirms through the host system interface 102 that the first communication protocol of the memory card 100 supports the PCIe1.0 protocol version or the PCIe2.0 protocol version of the host system interface 102, and The host system interface 102 reads and writes the data of the memory card 100 through the first transmitting and receiving end FT of the first selector 108.

In addition, in step S416, if it is determined that the memory card 100 supports PCIe 1.0 and PCIe 2.0 protocol versions, step S418 is performed. In contrast, if it is determined that the memory card 100 supports the PCIe3.0 protocol version, step S420 is performed. In step S420, when the host system interface 102 confirms that the second communication protocol of the memory card 100 supports the PCIe3.0 protocol version of the host system interface 102, the host system 103 uses the host system interface 102 through the first selection The second transmitting and receiving end ST of the device 108 reads and writes the data of the memory card 100.

In a preferred embodiment, after step 414 is performed, step S420 can also be performed directly, so that the host system interface 102 can read and write the memory card 100 through the second transmitting and receiving end ST of the first selector 108 The information.

To sum up, the read-write control system and method of the present invention, through the control module of the control device and the first selector, enable the host system to read and write memory cards with different communication protocols through only one interface. Data, solve the compatibility problem between the memory card and the read-write control system, improve the flexibility of the memory card, and reduce the production cost of the read-write control system.

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

100: Memory card 101: Memory card interface 102: Host system interface 102a: The first sub-interface 102b: The second sub-interface 103: host system 104: control device 106: control module 108: First selector 109: Bridge device 110: First interface 112: Second interface 112a: Control interface 112b: Transmission and receiving interface 114: second selector 200: NVMe controller TS1: the first trigger signal TS2: second trigger signal FT: First pass and receive end ST: Second pass and receive end DAT 0~3: data P1: The first transmission path P2: Second transmission path P3: Third transmission path P4: Fourth transmission path SD DAT 0~3: Secure digital data SD CMD: Secure Digital Instructions SD CLK: Secure digital clock TX/RX: data transmission/reception PERST#: Quick peripheral component interconnection reset signal CLKREQ#: Clock request operation signal REFCLK+, REFCLK-: reference clock differential pair signal S300, S302, S304, S306, S308, S400, S402, S404, S406, S408, S410, S412, S414, S416, S418, S420: steps

In order to more clearly describe the technical solutions in the embodiments of the present invention, the following will briefly introduce the accompanying drawings used in the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. Those with ordinary knowledge in the technical field to which the present invention pertains can also obtain other drawings based on these drawings. Figure 1 is a block diagram of the read-write control system according to the first embodiment of the present invention. Figure 2 is a block diagram of the read-write control system according to the second embodiment of the present invention. Figure 3 is a flow chart of the method of reading and writing control according to the first embodiment of the present invention. Figures 4-5 show a flow chart of the read-write control method according to the second embodiment of the invention.

100: Memory card

101: Memory card interface

102: Host system interface

102a: The first sub-interface

102b: The second sub-interface

103: host system

104: control device

106: control module

108: First selector

109: Bridge device

110: First interface

112: Second interface

112a: Control interface

112b: Transmission and receiving interface

114: second selector

TS1: the first trigger signal

TS2: second trigger signal

FT: First pass and receive end

ST: Second pass and receive end

DAT 0~3: data

P1: The first transmission path

P2: Second transmission path

P3: Third transmission path

P4: Fourth transmission path

SD DAT 0~3: Secure digital data

SD CMD: Secure Digital Instructions

SD CLK: Secure digital clock

TX/RX: data transmission/reception

PERST#: Quick peripheral component interconnection reset signal

CLKREQ#: Clock request operation signal

REFCLK+, REFCLK-: reference clock differential pair signal

Claims (26)

A read-write control system for a host system to read and write data of a memory card, the read-write control system includes: A memory card interface for connecting the memory card; A host system interface electrically connected to the memory card interface, and the host system is connected to the host system interface; and A control device includes a control module and a first selector, the control module is electrically connected to the memory card interface, the host system interface and the first selector, and the first selector is electrically connected to the memory card Interface and the host system interface, the control module includes: A bridge device electrically connected to the host system interface, the memory card interface and the first selector; and A second selector electrically connected to the host system interface, the memory card interface and the bridge device; Wherein, when the memory card operates under a first communication protocol, the memory card interface is electrically connected to the host system interface via the second selector, the bridge device and the first selector; Wherein, when the memory card operates with a second communication protocol, the memory card interface is electrically connected to the host system interface through the second selector, and the memory card interface is also electrically connected to the host system through the first selector The system interface is electrically connected. For example, the read-write control system described in item 1 of the scope of patent application, wherein the control device detects that the memory card is electrically connected to the memory card interface, and is connected to the memory card by the first communication protocol by default. A communication protocol activates the memory card. The read-write control system described in item 1 of the scope of patent application, wherein the bridge device includes: A first interface electrically connected to the host system interface and the first selector; and A second interface electrically connected to the memory card interface, the first interface and the second selector; Wherein, when the memory card operates under the first communication protocol, the memory card interface passes through the second selector, the second interface, and the first interface, and passes through the first selector of the control device to communicate with The host system interface is electrically connected, wherein the transmission path between the memory card interface, the second interface, the first interface, and the host system interface is defined as a first transmission path, the memory card interface, the second selector , The transmission path between the second interface, the first interface, the first selector, and the host system interface is defined as a second transmission path, allowing the host system to communicate with the memory card interface through the first transmission path And read and write the data of the memory card through the second transmission path using the first communication protocol; Wherein, when the memory card operates under the second communication protocol, the memory card interface is electrically connected to the host system interface through the second selector, and the memory card interface is electrically connected through the first selector of the control device , To be electrically connected to the host system interface, wherein the transmission path between the memory card interface, the second selector and the host system interface is defined as a third transmission path, the memory card interface, the first selector and The transmission path between the host system interfaces 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 memory through the fourth transmission path using the second communication protocol The information of the card. As described in item 3 of the scope of patent application, the host system interface includes a first sub-interface and a second sub-interface, and the first selector includes a first transmitting and receiving terminal and a second transmitting terminal. When the memory card operates under the first communication protocol, the host system triggers the first transmitting and receiving end of the first selector with a first trigger signal through the host system interface, so that the memory card interface The second sub-interface of the host system interface is electrically connected through the bridge device and the first transmitting and receiving end, and the memory card interface is also electrically connected to the second sub-interface of the host system interface through the second selector and the bridge device. A sub-interface. For example, the read-write control system described in item 4 of the scope of patent application, wherein when the memory card is operated by the second communication protocol, the second interface triggers the second selector with a second trigger signal to allow the memory The card interface is electrically connected to the first sub-interface of the host system interface through the second selector, and the host system triggers the second transmitting and receiving end of the first selector with the first trigger signal through the host system interface , So that the memory card interface is electrically connected to the second sub-interface of the host system interface through the second transmitting and receiving end. For the read-write control system described in item 4 of the scope of patent application, when the memory card operates with the second communication protocol, the host system interface disconnects the first transmission and reception end of the first selector. For the read-write control system described in item 4 of the scope of patent application, the host system communicates with the memory card through the host system interface, the second transmitting and receiving end of the first selector, and the second selector to Determine whether the memory card supports the protocol version of the host system. The protocol version includes PCIe1.0, PCIe2.0 and PCIe3.0 protocol versions. Such as the read-write control system described in item 7 of the scope of patent application, wherein when the host system confirms through the host system interface that the first communication protocol of the memory card supports the PCIe 1.0 protocol version or PCIe 2.0 of the host system Protocol version, the host system reads and writes the data of the memory card through the host system interface and the first transmitting and receiving end of the first selector, when the host system confirms the second of the memory card through the host system interface The communication protocol supports the PCIe3.0 protocol version of the host system, and the host system reads and writes the data of the memory card through the host system interface and the second transmitting and receiving end of the first selector. The read-write control system described in item 4 of the scope of patent application, wherein the bridge device further includes a non-volatile memory shortcut protocol controller, which is electrically connected to the first selector through the first interface, and is connected to the host The second sub-interface of the system interface is electrically connected, and when the memory card does not support the operation of the second communication protocol, the host system accesses the memory card through the host system interface and the non-volatile memory shortcut protocol controller When the memory card supports the operation of the second communication protocol, a non-volatile memory shortcut (NVMe) protocol driver of the host system passes through the host system interface and the second transmission of the first selector The receiving end accesses the data of the memory card. For example, the read-write control system described in item 1 of the scope of patent application, 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 secure digital (SD) mode. Express) mode. For the read-write control system described in item 1 of the scope of patent application, the data transmission rate of the first communication protocol of the memory card is lower than the data transmission rate of the second communication protocol. A read-write control system for a host system to read and write data of a memory card, the read-write control system includes: A first transmission path connected between a memory card interface, a bridge device and a host system interface, wherein the memory card interface is used for connecting the memory card; A second transmission path connected between the memory card interface, a second selector, the bridge device, a first selector, and the host system interface; A third transmission path connected between the memory card interface, the second selector and the host system interface; and A fourth transmission path connected between the memory card interface, the first selector and the host system interface; Wherein, when the memory card operates under the first communication protocol, the host system communicates with the memory card interface through the first transmission path through the host system interface and reads through the first communication protocol through the second transmission path Write the data of the memory card; Wherein, when the memory card operates under the second communication protocol, the host system communicates with the memory card interface through the third transmission path through the host system interface and reads through the second communication protocol through the fourth transmission path Write the information on the memory card. For the read-write control system described in claim 12, the host system interface includes a first sub-interface and a second sub-interface, the bridge device includes a first interface and a second interface, the first The selector includes a first transmitting/receiving end and a second transmitting/receiving end. When the memory card operates with the first communication protocol, the host system triggers the first selector with a first trigger signal via the host system interface The first transmitting and receiving end of the memory card interface is electrically connected to the second sub-interface of the host system interface through the bridge device and the first transmitting and receiving end, and the memory card interface is also through the second selector And the bridge device is electrically connected to the first sub-interface of the host system interface. For example, in the read-write control system described in item 13 of the scope of patent application, when the memory card operates under the second communication protocol, the second interface triggers the second selector with a second trigger signal to allow the memory The card interface is electrically connected to the first sub-interface of the host system interface through the second selector, and the host system interface triggers the second transmitting and receiving end of the first selector with the first trigger signal, so that the The memory card interface is electrically connected to the second sub-interface of the host system interface through the second transmitting and receiving end. For the read-write control system described in claim 14, wherein when the memory card operates with the second communication protocol, the host system interface disconnects the first transmitting and receiving end of the first selector. A read-write control method for a read-write control system for a host system to read and write a memory card through the read-write control system. The read-write control system includes a memory card interface, a host system interface, and a control device , The control device includes a control module and a first selector, the control module includes a bridge device and a second selector, the bridge device includes the first interface and a second interface, the host system interface includes A first sub-interface and a second sub-interface. The first selector includes a first transmitting and receiving end and a second transmitting and receiving end. The read-write control method includes the following steps: The host system triggers the first transmitting/receiving end of the first selector with a first trigger signal via the host system interface, the host system via the host system interface, the first transmitting/receiving end of the first selector, and The control module is electrically connected to the memory card interface; Detecting that the memory card is connected to the memory card interface, and connecting with the memory card using a first communication protocol; Determine whether the memory card supports the operation of a second communication protocol; When it is determined that the memory card does not support the operation of the second communication protocol, the memory card interface is electrically connected to the host system interface via the second selector, the bridge device, and the first selector, so that the host system Read and write the data of the memory card through the host system interface using the first communication protocol; When it is determined that the memory card supports the second communication protocol operation, the memory card interface is electrically connected to the host system interface through the second selector, and the memory card interface is also connected to the host system through the first selector The interface is electrically connected, and the host system uses the second communication protocol to read and write the data of the memory card with the second transmitting and receiving end of the first selector of the control device through the host system interface. The read-write control method described in item 16 of the scope of patent application, wherein after the step of detecting that the memory card is connected to the memory card interface, the second interface generates a second trigger signal to trigger the second selection Device. For example, the read-write control method described in claim 17, wherein after the step of detecting that the memory card is connected to the memory card interface, the host system communicates with the first interface of the bridge device through the host system interface and the The second interface activates the memory card using the first communication protocol, and when it is determined that the memory card supports the operation of the second communication protocol, activates the memory card using the second communication protocol. For example, the read-write control method described in item 16 of the scope of patent application, wherein when the memory card operates under the second communication protocol, the second interface triggers the second selector with a second trigger signal to allow the memory The card interface is electrically connected to the first sub-interface of the host system interface through the second selector. For example, in the read-write control method described in claim 16, wherein when the memory card operates with the second communication protocol, the host system uses a first trigger signal to trigger the first selector through the host system interface The second transmitting and receiving end allows the memory card interface to be electrically connected to the second sub-interface of the host system interface through the second transmitting and receiving end. For the read-write control method described in item 16 of the scope of patent application, when the memory card operates with the second communication protocol, the host system interface disconnects the first transmitting and receiving end of the first selector. As described in the 16th item of the scope of patent application, the host system communicates with the memory card through the host system interface, the second transmitting and receiving end of the first selector, and the second selector. Determine whether the memory card supports the protocol version of the host system. The protocol version includes PCIe1.0, PCIe2.0 and PCIe3.0 protocol versions. Such as the read-write control method described in item 22 of the scope of patent application, wherein when it is confirmed that the first communication protocol of the memory card supports the PCIe1.0 protocol version or the PCIe2.0 protocol version of the host system interface, the host system passes The host system interface and the first transmitting and receiving end of the first selector read and write the data of the memory card. When it is confirmed that the second communication protocol of the memory card supports the PCIe3.0 protocol version of the host system, the host The system reads and writes the data of the memory card through the host system interface and the second transmitting and receiving end of the first selector. For example, the read-write control method described in item 16 of the scope of patent application, 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 secure digital (SD) mode. Express) mode. In the read-write control method described in item 16 of the scope of patent application, the data transfer rate of the first communication protocol of the memory card is lower than the data transfer rate of the second communication protocol. For the read-write control method described in claim 16, wherein the bridge device further includes a non-volatile memory shortcut protocol controller, which is electrically connected to the first selector through the first interface, and is connected to the host The first sub-interface of the system interface is electrically connected. When the memory card does not support the operation of the second communication protocol, the host system accesses the memory card through the host system interface and the non-volatile memory shortcut protocol controller When the memory card supports the operation of the second communication protocol, a non-volatile memory shortcut (NVMe) protocol driver of the host system passes through the host system interface and the second transmission of the first selector The receiving end accesses the data of the memory card.

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