TWI579702B - Control methods - Google Patents

Description

Control Method

The present invention relates to an electronic device, a transmission control device, and a control method thereof, and in particular to an electronic device including a multi-joint, a transmission control device, and a control method thereof.

Digital cameras, mobile phones and MP3s have grown rapidly in recent years, and the demand for storage media and other electronic devices with data access capabilities has increased rapidly. In general, a flash drive or other data access device typically has only a single connector to interface with a host system. When the connector is connected to the host system, the host system accesses the internally stored data through the connection interface of the flash drive or other electronic device having the data access function.

However, most of the current connection interfaces are based on the Universal Serial Bus (USB) specifications, and in order to meet the diversified use requirements, the design of the connection interface may also include multiple connectors, so that different host systems can Access the same device. In this design, the transmission control device of the electronic device having the data access function must determine which of the at least one connector is coupled to the host system, that is, to determine that the signal provided by the host system is included in at least one of the connectors. Which is input into the electronic device with data access function.

In addition, after determining which connector is coupled to the host system, the transmission control device of the electronic device must also provide different operational functions. The host system can meet the diverse needs of the use. At present, the conventional technology is directed to the development of a control method for such a memory storage device.

In view of the above, the present invention provides an electronic device including: a first connection interface and a second connection interface, a transmission control device, a data access device, and a channel detection device. The first connection interface and the second connection interface are coupled to at least one host system. The transmission control device includes a first communication channel and a second communication channel, wherein the first connection interface is coupled to the first communication channel, and the second connection interface is coupled to the second communication channel, wherein the transmission control The device determines a coupling state according to the impedance information, and provides a corresponding operation function to the at least one host system according to the coupling state. The data access device is coupled to the transmission control device and configured to receive data sent by the at least one host system. The channel detecting device detects the impedance information between the first connection interface and the at least one host interface and the at least one host system.

According to an embodiment of the present invention, the corresponding operation function provided by the transmission control device includes at least one of a multimedia access function, a data transmission interface function, and an information security authentication function.

According to an embodiment of the present invention, the channel detecting device generates the impedance information according to the impedance value of the at least one host system coupled to at least one of the first connection interface and the second connection interface, wherein the impedance information is generated. The state represents whether at least one of the first connection interface and the second connection interface is coupled to the at least one host system.

According to an embodiment of the present invention, when the above transmission control device root When the at least one host system is coupled to the first connection interface and the second connection interface, the transmission control device announces to the at least one host system that the electronic device is the same external device, and provides the foregoing The corresponding operational function is provided to the at least one host system, wherein the corresponding operational function provided by the transmission control device includes different operational rights to the data access device.

According to an embodiment of the present invention, the first communication channel includes a first transmission channel and a first receiving channel, and the second communication channel includes a second transmission channel and a second receiving channel, wherein the channel detecting device And generating an impedance signal according to a voltage change generated by a terminal impedance of the at least one host system coupled to at least one of the first transmission channel and the second transmission channel, wherein the transmission control device further determines the impedance signal according to the impedance signal The above coupling state.

According to an embodiment of the present invention, the first communication channel further includes a first power channel, and the second communication channel further includes a second power channel, wherein the transmission control device utilizes the first power channel and the second power source A power source of at least one of the channels supplies power to the data access device.

According to an embodiment of the present invention, when the at least one host system is coupled to the first communication channel or the second communication channel, the first transmission channel or the second transmission channel is coupled to the At least one receiving channel of the host system, wherein the channel detecting device comprises: a bias circuit, a current source, a comparator, and a latch. The bias circuit biases the first transmission channel or the second transmission channel to a bias voltage. The current source outputs a current to the above according to a control signal for a predetermined time. The first transmission channel or the second transmission channel. The comparator compares the bias voltage and an intermediate voltage to generate a comparison signal. The latch locks the comparison signal to the impedance signal when the predetermined time is completed, wherein the transmission control device determines the coupling state based on the impedance signal.

According to an embodiment of the present invention, when the first transmission channel or the second transmission channel is coupled to the terminal impedance of the at least one host system, the current causes the bias voltage to exceed the intermediate voltage when the first transmission When the channel or the second transmission channel is not coupled to the terminal impedance of the at least one host system, the bias voltage does not exceed the intermediate voltage within the predetermined time.

According to an embodiment of the invention, the channel detecting device detects one of the first transmission channel and the second transmission channel at different time points.

According to another embodiment of the present invention, the electronic device further includes another channel detecting device, wherein when the channel detecting device detects the impedance information of one of the first transmission channel and the second transmission channel, The another channel detecting device simultaneously detects the impedance information of the other of the first transmission channel and the second transmission channel.

According to an embodiment of the present invention, the transmission control device includes a temporary storage device, wherein the temporary storage device is configured to store a setting parameter, wherein a first host system is coupled to the first connection interface and a second host system is coupled Up to the second connection interface, the transmission control device operates in an automatic mode, a priority mode, a maintenance mode, and a custom mode according to the setting parameter, to allow the first host system and the foregoing At least two host systems One performs the above-mentioned corresponding operational functions on the above data access device.

According to an embodiment of the present invention, when the transmission control device is operated in the automatic mode, the transmission control device is coupled to the first connection interface and the second connection respectively according to the first host system and the second host system. The order of the interfaces allows the first host system and one of the second host systems to perform the corresponding operational functions on the data access device.

According to an embodiment of the present invention, when the transmission control device is operated in the priority mode, the setting parameter further includes a priority order, and the transmission control device preferentially allows the first host system and the second host according to the priority order. One of the systems performs the above-described corresponding operational functions on the above-described data access device.

According to an embodiment of the present invention, when the transmission control device operates in the maintenance mode, the transmission control device allows the first host system and one of the second host systems to issue a sleep request to enter a sleep mode, The transmission control device only allows one of the same one of the first host system and the second host system that issues the sleep request to wake up the request, and performs the corresponding operation function on the data access device.

According to an embodiment of the present invention, when the transmission control device operates in the custom mode, the setting parameter further includes an access logic, and the transmission control device allows the first host system and the foregoing according to the access logic. At least one of the two host systems performs the above-described corresponding operational functions on the data access device.

According to an embodiment of the invention, the data access device is A USB rewritable non-volatile memory device, a USB multimedia device, a USB disk drive, a USB optical disk drive, a USB keyboard, a USB card reader, and a USB wireless network accessor.

The invention further provides a transmission control device for controlling a data access device, comprising: a host interface, a device interface and a data management circuit. The host interface includes a first communication channel and a second communication channel, the first communication channel is coupled to a first connection interface, and the second communication channel is coupled to a second connection interface, wherein the first connection interface And the second connection interface is coupled to the at least one host system. The device interface is coupled to the data access device. The data management circuit is coupled to the host interface and the device interface, wherein a channel detecting device detects impedance information between the first connection interface and the at least one of the second connection interfaces and the at least one host system, The data management circuit determines a coupling state according to the impedance information, and provides a corresponding operational function to the at least one host system according to the coupling state.

According to an embodiment of the present invention, the corresponding operation function provided by the data management circuit includes at least one of a multimedia access function, a data transmission interface function, and an information security authentication function.

According to an embodiment of the present invention, the data management circuit generates the impedance information according to the impedance value of the at least one of the first connection interface and the second connection interface being coupled to at least one host system, wherein the data management circuit is configured according to the foregoing The at least one host system is coupled to the first connection interface or the second connection interface, wherein the coupling state represents whether at least one of the first connection interface and the second connection interface is coupled to the at least one host system.

According to an embodiment of the present invention, when the data management circuit determines that the at least one host system is coupled to the first connection interface and the second connection interface according to the coupling state, the data management circuit pairs the at least one host system Declaring that the data access device is the same external device, and providing the corresponding operation function to the at least one host system, wherein the corresponding operation function provided by the data management circuit includes different operation rights to the data access device .

According to an embodiment of the present invention, the first communication channel includes a first transmission channel and a first receiving channel, and the second communication channel includes a second transmission channel and a second receiving channel, wherein when the channel is detected The device generates an impedance signal according to a voltage change generated by the at least one of the first transmission channel and the second transmission channel coupled to the terminal impedance of the at least one host system, and the data management circuit further determines the impedance signal according to the impedance signal. The above coupling state.

According to an embodiment of the present invention, the first communication channel further includes a first power channel, and the second communication channel further includes a second power channel, wherein the data management circuit utilizes the first bus bar and the second bus A power source of at least one of the banks supplies power to the data access device.

According to an embodiment of the present invention, when the at least one host system is coupled to the first communication channel or the second communication channel, the first transmission channel or the second transmission channel is coupled to the At least one receiving channel of the host system, wherein the channel detecting device comprises: a bias circuit, a current source, a comparator, and a latch. The above bias circuit will be on The first transmission channel or the second transmission channel is biased to a bias voltage. The current source outputs a current to the first transmission channel or the second transmission channel for a predetermined time according to a control signal. The comparator compares the bias voltage and an intermediate voltage to generate a comparison signal. The latch locks the comparison signal to the impedance signal at the end of the predetermined time, wherein the data management circuit determines the coupling state based on the impedance signal.

According to an embodiment of the present invention, when the first transmission channel or the second transmission channel is coupled to the terminal impedance of the at least one host system, the current causes the bias voltage to exceed the intermediate voltage when the first transmission When the channel or the second transmission channel is not coupled to the terminal impedance of the at least one host system, the bias voltage does not exceed the intermediate voltage within the predetermined time.

According to an embodiment of the invention, the channel detecting device detects one of the first transmission channel and the second transmission channel at different time points.

According to another embodiment of the present invention, when the channel detecting device detects the impedance information of one of the first connection interface and the second connection interface, another channel detecting device simultaneously detects the first connection. The impedance information of the interface and the other of the second connection interfaces.

According to an embodiment of the present invention, the data management circuit includes a temporary storage device, wherein the temporary storage device is configured to store a setting parameter, wherein a first host system is coupled to the first connection interface and a second host system is coupled Up to the second connection interface, the data management circuit operates in an automatic mode, a priority mode, a maintenance mode, and a custom mode according to the setting parameter And at least one of the first host system and the second host system is configured to perform the corresponding operation function on the data access device.

According to an embodiment of the present invention, when the data management circuit is operated in the automatic mode, the data management circuit is coupled to the first connection interface and the second connection respectively according to the first host system and the second host system. The order of the interfaces allows the first host system and one of the second host systems to perform the corresponding operational functions on the data access device.

According to an embodiment of the present invention, when the data management circuit is operated in the priority mode, the setting parameter further includes a priority order, and the data management circuit preferentially allows the first host system and the second host according to the priority order. One of the systems performs the above-described corresponding operational functions on the above-described data access device.

According to an embodiment of the present invention, when the data management circuit operates in the maintenance mode, the data management circuit allows one of the first host system and the second host system to issue a sleep request to enter the data management circuit. In a sleep mode, the data management circuit only allows one of the same one of the first host system and the second host system that issues the sleep request to wake up the request, and performs the corresponding operation function on the data access device.

According to an embodiment of the present invention, when the data management circuit operates in the custom mode, the setting parameter further includes an access logic, and the data management circuit allows the first host system and the foregoing according to the access logic. At least one of the two host systems performs the above on the data access device Corresponding operational functions.

According to an embodiment of the invention, the data access device is a USB rewritable non-volatile memory device, a USB multimedia device, a USB disk drive, a USB optical disk drive, a USB keyboard, and a USB card reader. One of the machines and a USB wireless network access device.

The present invention further provides a control method for controlling an electronic device, wherein the electronic device includes a first connection interface, a second connection interface, and a data access device, and the first connection interface and the second connection The interface is configured to be coupled to the at least one host system, and the control method includes: detecting, by using at least one channel detecting device, between the first connection interface and the second connection interface, and the at least one host system And generating, by the impedance information, an impedance signal; determining, according to the impedance signal, a state in which at least one of the first connection interface and the second connection interface is coupled to one of the at least one host system; and providing a corresponding according to the coupling state The operational function is given to at least one of the above host systems.

According to an embodiment of the invention, the corresponding operation function comprises at least one of a multimedia access function, a data transmission interface function and an information security authentication function.

According to an embodiment of the present invention, the impedance information is generated according to the impedance value of the at least one host system coupled to the first connection interface or the second connection interface, wherein the coupling state represents the first connection interface and Whether at least one of the second connection interfaces is coupled to the at least one host system.

According to an embodiment of the present invention, when the state is determined according to the coupling state When the at least one host system is coupled to the first connection interface and the second connection interface, the at least one host system announces that the electronic device is the same external device, and provides the corresponding operation function to the at least one host The system, wherein the corresponding operational function comprises a different operational authority to the data access device.

According to an embodiment of the present invention, the impedance signal is coupled to the at least one host system according to at least one of the first transmission channel of the first connection interface and the second transmission channel of the second connection interface. The voltage generated by the terminal impedance changes.

According to an embodiment of the present invention, the control method further includes: accessing the data by using a power source of at least one of the first power channel of the first connection interface and the second power channel of the second connection interface The device is powered.

According to an embodiment of the present invention, when the at least one host system is coupled to at least one of the first connection interface and the second connection interface, the first transmission channel or the second transmission channel transmits a coupling capacitor a receiving channel coupled to the at least one host system, wherein the channel detecting device detects impedance information between the first connection interface and the at least one host system and the at least one host system The step of the impedance signal includes: biasing the first transmission channel or the second transmission channel to a bias voltage; outputting a current to the first transmission channel or the second according to a control signal for a predetermined time a transmission channel; comparing the bias voltage and an intermediate voltage to generate a comparison signal; and at the end of the predetermined time, locking the comparison signal to be the impedance signal.

According to an embodiment of the present invention, when the first transmission channel or the second transmission channel is coupled to the terminal impedance of the at least one host system, the bias voltage exceeds the intermediate voltage due to the current, when the first When the transmission channel or the second transmission channel is not coupled to the terminal impedance of the at least one host system, the bias voltage does not exceed the intermediate voltage within the predetermined time.

According to an embodiment of the invention, the channel detecting device detects one of the first transmission channel and the second transmission channel at different time points.

According to an embodiment of the present invention, when the channel detecting device detects the impedance information of one of the first transmission channel and the second transmission channel, the another channel detecting device simultaneously detects the first transmission. The impedance information of the channel and the other of the second transmission channels.

According to an embodiment of the present invention, the control method further includes: when a first host system is coupled to the first connection interface and a second host system is coupled to the second connection interface, storing according to a temporary register One of setting parameters to enter one of an automatic mode, a priority mode, a maintenance mode, and a custom mode; and allowing the above according to one of the automatic mode, the priority mode, the maintenance mode, and the custom mode At least one of the first host system and the second host system performs the corresponding operational function on the data access device.

According to an embodiment of the present invention, the control method further includes: entering the automatic mode; and coupling to the first connection interface and the second connection interface according to the first host system and the second host system respectively The sequence of steps allows the first host system and one of the second host systems to perform the corresponding operational functions on the data access device.

According to an embodiment of the present invention, the control method further includes: entering the priority mode; and preferentially allowing one of the first host system and the second host system to access the data according to one of the setting parameters. The device performs the corresponding operational functions described above.

According to an embodiment of the present invention, the control method further includes: entering the maintaining mode; allowing the first host system and one of the second host systems to issue a sleep request to enter a sleep mode; and allowing only the sleep to be issued And requesting one of the same one of the first host system and the second host system to wake up the request, and performing the corresponding operation function on the data access device.

According to an embodiment of the present invention, the control method further includes: entering the custom mode; and accessing logic according to one of the setting parameters, allowing at least one of the first host system and the second host system to store the data The fetching device performs the corresponding operational functions described above.

According to an embodiment of the invention, the data access device is a USB rewritable non-volatile memory device, a USB multimedia device, a USB disk drive, a USB optical disk drive, a USB keyboard, and a USB card reader. One of the machines and a USB wireless network access device.

100, 300, 400, 700, 800‧‧‧ electronic devices

110, 310, 410, 710‧‧‧ first connection interface

120, 320, 420, 720‧‧‧ second connection interface

130, 330, 430, 730, 811‧‧‧ transmission control device

140, 340, 440, 740‧‧‧ data access devices

202‧‧‧Data Management Circuit

204‧‧‧Host interface

206‧‧‧ device interface

350, 450, 500‧‧‧ channel detection devices

431‧‧‧Transporter

432‧‧‧ Receiver

502‧‧‧bias circuit

504‧‧‧current source

506‧‧‧ comparator

508‧‧‧Inverter

510‧‧‧Latch circuit

750‧‧‧First channel detection device

760‧‧‧Second channel detection device

800‧‧‧Electronic system

10, 820‧‧‧ first host system

20, 830‧‧‧ second host system

50‧‧‧Host system

C1‧‧‧first communication channel

CT1‧‧‧ first transmission channel

CTP1‧‧‧First transmission positive terminal

CTN1‧‧‧second transmission negative terminal

CR1‧‧‧first receiving channel

CRP1‧‧‧first receiving positive terminal

CRN1‧‧‧First receiving negative terminal

C2‧‧‧Second communication channel

CT2‧‧‧second transmission channel

CTP2‧‧‧second transmission positive terminal

CTN2‧‧‧second transmission negative terminal

CR2‧‧‧second receiving channel

CRP2‧‧‧second receiving positive terminal

CRN2‧‧‧second receiving negative end

C3‧‧‧ third communication channel

CTP‧‧‧ transmission positive terminal

CTN‧‧‧ transmission negative end

C‧‧‧coupled capacitor

I‧‧‧current

T‧‧‧definite time

VBUS‧‧‧ power channel

VB‧‧‧ bias voltage

VMID‧‧‧ intermediate voltage

VS‧‧‧ supply voltage

SCTL‧‧‧ control signal

SCM‧‧‧ comparison signal

SI‧‧‧ impedance signal

SI1‧‧‧first impedance signal

SI2‧‧‧second impedance signal

ST‧‧‧ trigger signal

ZTM‧‧‧terminal impedance

S91~S93‧‧‧Step procedure

1 is a block diagram showing an electronic device according to an embodiment of the present invention; 2 is a block diagram showing a transmission control device according to an embodiment of the first embodiment of the present invention; and FIG. 3 is a schematic diagram showing an electronic device according to another embodiment of the present invention; FIG. 5 is a circuit diagram showing a channel detecting device according to an embodiment of the present invention; FIG. 6A is a circuit diagram showing a channel detecting device according to an embodiment of the present invention; The host system of the embodiment shown in FIG. 5 is not coupled to the timing diagram of the connection interface; FIG. 6B is a timing diagram showing the connection of the host system to the connection interface according to the embodiment of the fifth embodiment of the present invention; Figure 7 is a block diagram showing an electronic device according to another embodiment of the present invention; Figure 8 is a block diagram showing an electronic system according to an embodiment of the present invention; and Figure 9 is a block diagram showing A flowchart of a method of controlling an electronic device according to an embodiment of the invention.

The above described objects, features, and advantages of the present invention will become more apparent from the description of the appended claims appended claims A good example. It must be noted that the present invention provides a number of applicable inventive concepts, here The specific embodiments disclosed are merely illustrative of specific ways to achieve and use the invention, and are not intended to limit the scope of the invention.

1 is a block diagram showing an electronic device according to an embodiment of the present invention. As shown in FIG. 1 , the electronic device 100 includes a first connection interface 110 , a second connection interface 120 , a transmission control device 130 , and a data access device 140 . The first connection interface 110 and the second connection interface 120 respectively include a connector, wherein the electronic device 100 is coupled to one or several host systems of the same or different types through the dual connectors of the first connection interface 110 and the second connection interface 120. . According to an embodiment of the present invention, the electronic device 100 may include a plurality of connection interfaces and a plurality of connectors, and only the first connection interface 110 and the second connection interface 120 are used for explanation.

According to an embodiment of the invention, the first connection interface 110 and the second connection interface 120 are at least compatible with the Universal Serial Bus (USB) standard. However, it should be understood that the present invention is not limited thereto, and the first connection interface 110 or the second connection interface 120 may also be a Parallel Advanced Technology Attachment (PATA) standard, Institute of Electrical and Electronics Engineers (Institute of Electrical). And Electronic Engineers, IEEE) 1394 standard, Peripheral Component Interconnect Express (PCI Express) standard, Serial Advanced Technology Attachment (SATA) standard, Secure Digital (SD) interface standard, Super Ultra High Speed-I (UHS-I) interface standard, Ultra High Speed-II (UHS-II) interface standard, Memory Stick (MS) interface standard, multimedia memory card (Multi Media Card, MMC) interface standard, intrusive multimedia storage Embedded Multimedia Card (eMMC) interface standard, Universal Flash Storage (UFS) interface standard, Compact Flash (CF) interface standard, Integrated drive electronics interface (Integrated Device Electronics, IDE) Standard or other suitable standard.

The first connection interface 110 and the second connection interface 120 may be packaged in a wafer with the transmission control device 130, or the first connection interface 110 and the second connection interface 120 may be packaged outside a wafer including the transmission control device 130. In an exemplary embodiment of the multi-connector electronic device, at least one interface interface conforming to the interface standard may be all the same, partially identical, or all different. For example, the interface standard of the first connection interface 110 and the second connection interface 120 may be that both conform to the second generation universal serial bus (USB 2.0) standard, or both conform to the third generation universal serial bus (USB 3.0). Standards, either one of which conforms to the USB 2.0 standard and the other conforms to the USB 3.0 standard, or one of which conforms to the USB 3.1 Type-C standard and the other conforms to the USB 3.1 Type-A standard, or the first connection interface 110 and The interface standard of the second connection interface 120 may also be a combination of any two of the aforementioned interface standards.

The transmission control device 130 is configured to execute a plurality of logic gates or control commands implemented in a hard type or a firmware type, and according to the instruction pair of the at least one host system coupled to the first connection interface 110 and the second connection interface 120 The data access device 140 performs operations such as transmission and reception of data.

The data access device 140 is coupled to the transmission control device 130 for receiving data sent by at least one host system coupled to at least one of the first connection interface 110 and the second connection interface, and transmitting the data to the coupling At least one host to at least one of the first connection interface 110 and the second connection interface 120 system.

According to an embodiment of the present invention, when the data access device 140 is a storage medium, the transmission control device 130 is further configured to: according to the instructions of the at least one host system coupled to the first connection interface 110 and the second connection interface 120 The data access device 140 performs a data erasing operation. According to another embodiment of the present invention, the data access device 140 is a USB rewritable non-volatile memory device, a USB multimedia device, a USB disk drive, a USB optical disk drive, a USB keyboard, and a USB card reader. One of the devices, a USB wireless network access device, and other devices that can be used by the host system to access data.

Fig. 2 is a block diagram showing a transmission control device according to an embodiment of Fig. 1 of the present invention. As shown in FIG. 2, the transmission control device 130 includes a data management circuit 202, a host interface 204, and a device interface 206. The data management circuit 202 is used to control the overall operation of the data access device 140 of FIG. 1. Specifically, the data management circuit 202 has a plurality of control commands, and when the electronic device 100 operates, the control commands are executed. Perform data transfer, reception, and even erase. The operation of the data management circuit 202 will be described below, which is equivalent to the operation of the transmission control device, and will not be described below.

According to an embodiment of the invention, the control commands of the data management circuit 202 are implemented in firmware. For example, the data management circuit 202 has a temporary register (not shown in FIG. 2). The control command of the data management circuit 202 stores the control commands in the temporary memory by means of firmware writing. Moreover, the data management circuit 202 further has a microprocessor (not shown in FIG. 2), and the microprocessor performs data access and even erase operations according to the control instructions stored in the register. Control of data management circuit 202 in accordance with another embodiment of the present invention Instructions can also be implemented in hardware.

The host interface 204 is coupled to the data management circuit 202 and is configured to receive and identify instructions and data transmitted by the host system. That is, the instructions and data transmitted by at least one host system coupled to at least one of the first connection interface 110 and the second connection interface 120 are transmitted to the data management circuit 202 through the host interface 204. According to one embodiment of the invention, the host interface 204 is compatible with the SATA standard. However, it must be understood that the present invention is not limited thereto in any way, and the host interface 204 may be compatible with the PATA standard, the IEEE 1394 standard, the PCI Express standard, the USB standard, the SD standard, the UHS-I standard, and the UHS-II. Standard, MS standard, MMC standard, eMMC standard, UFS standard, CF standard, IDE standard or other suitable data transmission standard.

In an electronic device 100 having a plurality of host interfaces, the implementation of the host interface 204 may be one or more host interfaces, coupled to the data management circuit 202, and coupled to the first connection interface for receiving or identifying, respectively. The instructions and data transmitted by at least one host system of at least one of the at least one of the second connection interface 120. According to an embodiment of the present invention, the transmission control device 130 may include one to several communication channels. In an embodiment of a single communication channel, the communication channel can be disposed in the host interface 204. In an embodiment of the plurality of communication channels, the communication channels may all be disposed in the host interface 204, or one-to-one may be disposed in the same number of host interfaces.

The device interface 206 is coupled to the data management circuit 202 and is used to access the data access device 140 of FIG. That is, the data to be transmitted to the data access device 140 is converted to a format acceptable to the data access device 140 via the device interface 206, and the data transmitted by the data access device 140 is also transmitted through the device. The interface 206 is converted into a format acceptable to at least one host system coupled to at least one of the first connection interface 110 and the second connection interface 120.

Figure 3 is a schematic view showing an electronic device according to another embodiment of the present invention. As shown in FIG. 3 , the electronic device 300 includes a first connection interface 310 , a second connection interface 320 , a transmission control device 330 , a data access device 340 , and a channel detection device 350 . Compared with the electronic device 100 of FIG. 1 , the electronic device 300 further includes a channel detecting device 350 .

The transmission control device 330 is coupled to the first connection interface 310 through the first communication channel C1, to the second connection interface 320 through the second communication channel C2, and to the data access device 340 via the third communication channel C3. It is to be noted that, in accordance with an embodiment of the present invention, on the hardware architecture of the electronic device 300, the first connection interface 310 and the second connection interface 320 each include a connector for coupling to at least one host system.

According to an embodiment of the invention, the first connection interface 310 and the second connection interface 320 are coupled to at least one host system using the connector described above. Therefore, the coupling state of the first connection interface 310 and the second connection interface 320 to the host system includes, but is not limited to, the first connection interface 310 is coupled to a host system, and the second connection interface 320 is not coupled to any host system. The first connection interface 310 is not connected to any host system, the second connection interface 320 is coupled to a host system; the first connection interface 310 is electrically connected to a first host system, and the second connection interface 320 is coupled to the The second host system; and the first connection interface 310 and the second connection interface 320 are coupled to the same host system.

The channel detecting device 350 is coupled to the first communication channel C1 and the second communication channel C2 for detecting the first connection interface 310 and the second connection interface. An impedance signal SI is generated by impedance information between at least one of the 320 and at least one of the host systems. The transmission control device 330 further determines the coupling state according to the impedance information of the impedance signal SI, wherein the coupling state represents whether at least one of the host systems is coupled to at least one of the first connection interface 310 and the second connection interface 320.

According to an embodiment of the present invention, the transmission control device 330 is configured to correspond to a different first connection interface according to whether at least one of the host systems is coupled to the coupled state of the at least one of the first connection interface 310 and the second connection interface 320. 310 and the second connection interface 320 provide different operational functions to the coupled host system. It is to be understood that the host system to which at least one of the first connection interface 310 and the second connection interface 320 are coupled is one or a plurality of identical or different host systems. That is, when the first connection interface 310 is coupled to the first host system, the transmission control device 330 is configured to provide the first operation function to the first host system; when the second connection interface 320 is coupled to the second host system, the transmission is performed. The control device 330 is configured to provide a second operational function to the second host system, wherein the first operational function is different from the second operational function. Therefore, the transmission control device 330 can provide different operational functions to the connected host system according to the coupling state between the host system and at least one of the first connection interface 310 and the second connection interface 320.

For example, according to at least one of the host system being coupled to the first connection interface 310 and the second connection interface 320, the transmission control device 330 announces to the connected host system that the data access device 340 is a different external device, and Provide different operational functions to the connected host system. The external devices announced by the transmission control device 330 include, but are not limited to, a USB rewritable non-volatile memory device, a USB multimedia device, a USB disk drive, a USB optical disk drive, a USB keyboard, a USB card reader, and a USB wireless network. Receiver and other access to the host system One of the devices of the data. Therefore, corresponding to the different first connection interface 310 and the second connection interface 320, the different operation functions provided by the transmission control device 330 include at least one of a multimedia access function, a data input and output interface function, and an information security authentication function. The information security authentication function is, for example, a password authentication function that must be executed when the electronic device 300 is connected to the corresponding host system. In addition, according to an embodiment of the present invention, when the first connection interface 310 and the second connection interface 320 are simultaneously coupled to the same host system, or are simultaneously coupled to different host systems, the transmission control device 330 may also be The same or different host systems that are connected declare that the data access device 340 is a different external device and provides different operational functions to the coupled host system.

According to an embodiment of the present invention, the coupling state of the host system and the first connection interface 310 and the second connection interface 320 may include the first connection interface 310 and the second connection interface 320 being coupled to the same or different hosts. The system, the transmission control device 330 announces to the host system that the data access device 340 is the same external device, and provides different operational functions to the host system coupled to the first connection interface 310 and the second connection interface 320, respectively. The different operational functions provided by the transmission control device 330 include different operational rights to the data access device 340. For example, when the data access device 340 is a USB wireless network access device, the speed of the host system accessing the network coupled to the first connection interface 310 and the second connection interface 320 is different.

That is, the transmission control device 330 provides different operational functions to the host system coupled to different connection interfaces, where different operational functions include declaring the electronic device 300 as a different external device, and announcing the electronic device 300 to the host system It has different operating rights for the same external device.

According to an embodiment of the present invention, the first connection interface 310 and the second connection interface 320 all conform to the same transmission interface standard; according to another embodiment of the present invention, one of the first connection interface 310 and the second connection interface 320 In accordance with the first transmission interface standard, the other of the first connection interface 310 and the second connection interface 320 conforms to the second transmission interface standard, wherein the first transmission interface standard is different from the second transmission interface standard. For example, the interface standard of the first connection interface 310 and the second connection interface 320 may be that both conform to the second generation universal serial bus (USB 2.0) standard, or both conform to the third generation universal sequence bus ( The USB 3.0) standard, or one of the first connection interface 310 and the second connection interface 320 conforms to the USB 1.1 transmission interface standard and the other conforms to the SATA standard, or one of the first connection interface 310 and the second connection interface 320 It complies with the USB 2.0 standard while the other complies with the USB 3.0 standard, or one of them conforms to the USB 3.1 Type-C standard and the other complies with the USB 3.1 Type-A standard. That is, the transmission interface standards that the first connection interface 310 and the second connection interface 320 conform to are not limited.

According to an embodiment of the invention, the first connection interface 310 and the second connection interface 320 can be packaged in a wafer with the transmission control device 330 and the channel detection device 350. According to another embodiment of the present invention, the first connection interface 310 and the second connection interface 320 are packaged outside a wafer including the transmission control device 330 and the channel detection device 350.

Fig. 4 is a view showing a transmission control device according to an embodiment of Fig. 3 of the present invention. As shown in FIG. 4, the electronic device 400 includes the first connection interface 410, the second connection interface 420, the transmission control device 430, the data access device 440, and the channel detection device, similar to the electronic device 300 of FIG. 450. According to an embodiment of the present invention, the data access device 440 further includes a transmitter 431 and a receiver 432. The first communication channel C1 of FIG. 3 includes a first transmission channel CT1 and a first receiving channel CR1, and the second communication channel C2 includes a second transmission channel CT2 and a second receiving channel CR2.

As shown in FIG. 4, the channel detecting device 450 is coupled to the first transmission channel CT1 and the second transmission channel CT2 for detecting whether at least one of the first connection interface 410 and the second connection interface 420 is coupled to At least one impedance information of the host system generates an impedance signal SI. For example, if the first connection interface 410 is coupled to the host system, the first transmission channel CT1 is coupled to the receiving channel of the host system. Therefore, the channel detecting device 450 determines whether the first connection interface 410 is coupled to a host system according to whether the first transmission channel CT1 is coupled to the terminal impedance of the receiving channel of the host system.

According to an embodiment of the present invention, when the channel detecting device 450 detects that the first transmission channel CT1 is coupled to a terminal impedance, the first connection interface 410 is coupled to the host system. According to another embodiment of the present invention, if the channel detecting device 450 detects that the first transmission channel CT1 is in a floating state (that is, the terminal impedance of the first transmission channel CT1 is infinite) At the time, the first connection interface 410 is not coupled to the host system. Therefore, the transmission control device 430 can determine whether at least one of the first connection interface 410 and the second connection interface 420 is coupled to at least one host system according to the impedance information represented by the impedance signal SI.

When the transmission control device 430 receives the impedance signal SI, the transmitter 431 selects at least one of the first transmission channel CT1 and the second transmission channel CT2 to transmit data from the data access device 440 according to the impedance signal SI, and the receiver The 432 selects at least one of the first receiving channel CR1 and the second receiving channel CR2 according to the impedance signal SI to receive an instruction and data coupled to the first connection interface 410 or the second connection interface 420, thereby operating the data access device 440.

According to an embodiment of the present invention, when the channel detecting device 450 detects that only the first connection interface 410 is coupled to a host system, only the second connection interface 420 is coupled to the host system or the first connection interface 410 and the second When the connection interface 420 is coupled to the host system, the transmission control device 430 provides a host coupled to the first connection interface 410 or the second connection interface 420 according to the setting parameters stored in a register (not shown). The different operating functions of the system, the detailed content will be explained below.

According to an embodiment of the invention, the first transmission channel CT1 and the second transmission channel CT2 are differential channels. That is, the first transmission channel CT1 includes a first transmission positive terminal CTP1 and a second transmission negative terminal CTN1, and the second transmission channel CT2 includes a second transmission positive terminal CTP2 and a second transmission negative terminal CTN2. Similarly, the first receiving channel CR1 includes a first receiving positive terminal CRP1 and a first receiving negative terminal CRN1, and the second receiving channel CR2 includes a second receiving positive terminal CRP2 and a second receiving negative terminal CRN2. When the first connection interface 410 or the second connection interface 420 is coupled to the host system, both the transmission positive terminal and the transmission negative terminal are coupled to the terminal impedance of the host system, so the channel detection device 450 only needs to detect the transmission positive. The extreme and the transmission of one of the negative terminals, the impedance state can be determined to generate the impedance signal SI. Hereinafter, the channel detecting device 450 detects the impedance state of either the transmitting positive terminal and the transmitting negative terminal, and the description will be made.

Figure 5 is a circuit diagram showing a channel detecting device according to an embodiment of the present invention. As shown in FIG. 5, when the host system 50 is coupled to the first When one of the interface 410 and the second connection interface 420 is connected, the transmission positive terminal CTP or the transmission negative terminal CTN of the first transmission channel CT1 or the second transmission channel CT2 is coupled to the terminal impedance ZTM of the host system 50 through the coupling capacitor C. . As described above, the channel detecting device 500 can be coupled to one of the transmitting positive terminal CTP and the transmitting negative terminal CTN of the first transmission channel CT1 or the second transmission channel CT2 for detecting whether it is coupled to the host system 50. Terminal impedance ZTM.

According to an embodiment of the invention, when the channel detecting device 500 is coupled to the transmitting positive terminal CTP, the channel detecting device 500 detects the terminal impedance ZTM of the receiving system positive terminal CRP of the host system 50. According to another embodiment of the present invention, when the channel detecting device 500 is coupled to the transmitting negative terminal CTN, the channel detecting device 500 detects the terminal impedance ZTM of the receiving negative terminal CRN of the host system 50. According to other embodiments of the present invention, the channel detecting device 500 can simultaneously detect the transmitting positive terminal CTP and the transmitting negative terminal CTN.

As shown in FIG. 5, the channel detecting device 500 includes a bias circuit 502, a current source 504, a comparator 506, an inverter 508, and a latch circuit 510. The bias circuit 502 is configured to bias one of the positive terminal CTP and the negative terminal CTN to the bias voltage VB. The current source 504 is coupled between the supply voltage VS and one of the transmission positive terminal CTP and the transmission negative terminal CTN, and sinks the current I into one of the transmission positive terminal CTP and the transmission negative terminal CTN according to the control signal SCTL. According to an embodiment of the invention, the current I is generated by a current source or a resistor.

The comparator 506 compares the bias voltage VB transmitting the positive terminal CTP and the one of the negative terminal CTN and the intermediate voltage VMID according to the control signal SCTL to generate a comparison signal SCM. The latch circuit 510 will according to the trigger signal ST The comparison signal SCM inverted by the inverter 508 is locked to be the impedance signal SI. According to an embodiment of the invention, the control signal SCTL is generated by the transmission control device 430 of Fig. 4 and is not shown. To illustrate the invention in detail, the comparison signal SCM is inverted here using inverter 508, which is known to those skilled in the art to be able to combine the actions of inverter 508 with comparator 506.

Figure 6A is a timing diagram showing that the host system according to the embodiment of Figure 5 of the present invention is not coupled to the connection interface. Since the host system 50 is not coupled to the first connection interface 410 or the second connection interface 420, the coupling capacitor C is not coupled to the termination impedance ZTM of the host system 50. The bias circuit 502 first biases one of the positive terminal CTP and the negative terminal CTN to the bias voltage VB.

As shown in FIG. 6A, when the control signal SCTL is switched from the low logic level to the high logic level, the current source 504 continues to generate the current I to the positive terminal CTP and the negative terminal CTN for a predetermined time T, so that The voltage value of one of the positive terminal CTP and the negative terminal CTN is quickly charged from the bias voltage VB to the supply voltage VS, and after comparison with the intermediate voltage VMID, the comparator 506 generates a high voltage level comparison signal SCM. When the predetermined time T ends, the trigger signal ST is switched from the low voltage level to the high voltage level, and the latch circuit 510 locks the inverted comparison signal SCM into the impedance signal SI. According to an embodiment of the present invention, the impedance signal SI is at a low logic level. Therefore, the transmission control device 430 determines that the host system 50 is not coupled to the first connection according to the impedance signal SI being a low logic level. Interface 410 or second connection interface 420.

Figure 6B is a timing diagram showing the coupling of the host system shown in the embodiment of Figure 5 of the present invention to the connection interface. Since the host system 50 is coupled to the A connection interface 410 or a second connection interface 420 is coupled to the terminal impedance ZTM of the host system 50 through the coupling capacitor C through one of the transmission positive terminal CTP and the transmission negative terminal CTN. The bias circuit 502 first biases one of the positive terminal CTP and the negative terminal CTN to the bias voltage VB.

As shown in FIG. 6B, when the control signal SCTL is switched from the low logic level to the high logic level, the current source 504 continues to generate the current I to the one of the positive terminal CTP and the negative terminal CTN for a predetermined time T. Since the coupling capacitor C is coupled to the terminal impedance ZTM, the voltage value of one of the positive terminal CTP and the negative terminal CTN is not charged to the intermediate voltage VMID within a predetermined time T. Therefore, after the end of the predetermined time T, the comparison signal SCM remains at a low logic level. When the trigger signal ST is switched from the low voltage level to the high voltage level, the latch circuit 510 locks the inverted comparison signal SCM into the impedance signal SI. According to an embodiment of the present invention, the impedance signal SI is a high logic level. Therefore, the transmission control device 430 determines that the host system 50 is coupled to the first connection interface 410 according to the impedance signal SI being a high logic level. Or the second connection interface 420.

According to other embodiments of the present invention, the transmission control device 430 can determine that the host system 50 is not coupled to the first connection interface 410 or the second connection interface 420 according to the impedance signal being a high logic level, according to the impedance signal being a low logic level. It is determined that the host system 50 is coupled to the first connection interface 410 or the second connection interface 420. That is, the designer can define the coupling state of the host system represented by the impedance signal SI. According to an embodiment of the present invention, the channel detecting device 500 detects the first transmission channel CT1 coupled to the first connection interface 410 and the second transmission channel CT2 coupled to the second connection interface 420 at different time points. One of them.

Figure 7 is a diagram showing electricity according to other embodiments of the present invention. Block diagram of the sub-device. Compared with the electronic device 400 of FIG. 4, the electronic device 700 includes a first channel detecting device 750, a second connecting interface 720, a transmission control device 730, and a data access device 740. And a second channel detecting device 760.

The first channel detecting device 750 is coupled to the first transmission channel CT1, and is coupled to the terminal impedance ZTM of the first host system 10 according to whether at least one of the transmitting positive terminal and the transmitting negative terminal of the first transmission channel CT1 is coupled to The first impedance signal SI1 is supplied to the transmission control device 730. The second channel detecting device 760 is coupled to the second transmission channel CT2, and is coupled to the terminal impedance ZTM of the second host system 20 according to whether at least one of the transmitting positive terminal and the transmitting negative terminal of the second transmission channel CT2 is coupled. A second impedance signal SI2 is provided to the transmission control device 730. According to an embodiment of the present invention, the first channel detecting device 750 and the second channel detecting device 760 can detect whether the first host system 10 and the second host system 20 are respectively coupled at the same time point or different time points. The first connection detecting device 750 and the second channel detecting device 760 are both shown in the channel detecting device 500 of FIG.

According to an embodiment of the present invention, the transmission control device 730 further includes a temporary storage device (not shown) for storing the setting parameters, when the first host system 10 and the second host system 20 are simultaneously coupled to the first When the interface 710 and the second connection interface 720 are connected, the transmission control device 730 operates in one of the automatic mode, the priority mode, the maintenance mode, and the custom mode according to the setting parameters stored in the register, and the transmission control device 730 is different. The mode allows the first host system 10 and the second host system 20 to perform corresponding operational functions on the data access device 740. According to an embodiment of the invention, the setting parameters can be written using the firmware and Store.

Figure 8 is a block diagram showing an electronic system in accordance with an embodiment of the present invention. As shown in FIG. 8, the electronic system 800 includes an electronic device 810, a first host system 820, and a second host system 830, wherein the electronic device 810 includes a transmission control device 811, and the electronic device 810 and the transmission control device 811 include the present invention. All embodiments of Figures 1-7.

The electronic device 810 communicates with the first host system 820 by using the first transmission channel CT1 and the first receiving channel CR1, and communicates with the second host system 830 by using the second transmission channel CT2 and the second receiving channel CR2. In addition, the power channels VBUS of the electronic device 810, the first host system 820, and the second host system 830 are coupled together, so the first host system 820 and the second host system 830 both provide power to the electronic device 810.

According to an embodiment of the present invention, when the transmission control device 811 operates in the automatic mode, the transmission control device 811 allows the first host system 820 according to the order in which the first host system 820 and the second host system 830 are coupled to the electronic device 810. And one of the second host systems 830 performs a corresponding operational function on the data access device of the electronic device 810. According to an embodiment of the invention, the operation function comprises at least one of a multimedia access function, a data input and output interface function, and an information security authentication function.

For example, after the first host system 820 is coupled to the electronic device 810, the second host system 830 is coupled to the electronic device 810. The electronic device 810 only allows the first host system 820 to perform corresponding operational functions on the electronic device 810, regardless of the request of the second host system 830. According to an embodiment of the present invention, although the electronic device 810 only allows the first host system 820 to perform corresponding operations As a function, since the power channels VBUS are coupled to each other, the second host system 830 can still charge the electronic device 810 and the first host system 820.

According to another embodiment of the present invention, when the transmission control device 811 operates in the priority mode, the setting parameters of the register (not shown) stored in the transmission control device 811 further include a priority order. According to an embodiment of the present invention, the user can set the priority order by means of firmware writing. The transmission control device 811 preferentially allows one of the first host system 820 and the second host system 830 to perform a corresponding operational function on the electronic device 810 according to the set priority order.

For example, it is assumed that the priority order is set such that the priority of the first transmission channel CT1 and the second reception channel CR1 is higher than the priorities of the second transmission channel CT and the second reception channel CR2. When the second host system 830 is coupled to the electronic device 810 and issues a request, the electronic device 810 does not respond; when the first host system 820 is coupled to the electronic device 810 and issues a request, the electronic device 810 then allows the first host system The 820 performs the corresponding operational function.

According to still another embodiment of the present invention, when the transmission control device 811 operates in the maintenance mode, the transmission control device 811 only allows the host system that causes the transmission control device 811 to enter the sleep mode to perform a corresponding operational function. For example, when the transmission control device 811 is operating in the maintenance mode, the first host system 820 enters the transmission control device 811 into a sleep mode. Since the transmission control device 811 is currently operating in the maintenance mode, the wake-up request for the second host system 830 is ignored and only the wake-up request of the first host system 820 is accepted. That is, in the maintenance mode, the transmission control device 811 accepts only the wake-up request of the host system that has entered it into the sleep mode.

According to still another embodiment of the present invention, when the transmission control device 811 operates When in the custom mode, the user can set an access logic in the setting parameters. The transmission control device 811 allows at least one of the first host system 820 and the second host system 830 to perform corresponding operational functions on the electronic device 810 in accordance with the set access logic.

For example, the transmission control device 811 can control the first host system 820 and the second host system 830 to perform corresponding operation functions on the electronic device 810 or perform corresponding operations on the electronic device 810 in a time division multiplexing manner according to the access logic. Operational features. Alternatively, the user can set the sequence or logic of the first host system 820 and the second host system 830 to perform corresponding operational functions on the electronic device 810 as needed.

Figure 9 is a flow chart showing a method of controlling an electronic device according to an embodiment of the present invention. Please refer to FIGS. 3, 4, 7, and 9. The flowchart of FIG. 9 is applicable to at least the electronic device 300 of FIG. 3, the electronic device 400 of FIG. 4, and the electronic device 700 of FIG. In step S91, the channel detecting device 450 detects impedance information between at least one of the first connection interface 410 and the second connection interface 420 and at least one host system to generate an impedance signal SI. As shown in FIG. 7 , the first channel detecting device 750 and the second channel detecting device 760 detect the first connection interface 710 and the second connection interface 720 between the first host system 10 and the second host system 20 . The impedance state generates a first impedance signal SI1 and a second impedance signal SI2.

Next, in step S92, the transmission control device 430 determines, according to the impedance signal SI, a coupling state of at least one of the first connection interface 410 and the second connection interface 420 to at least one host system. As shown in FIG. 7, the transmission control device 730 determines the first according to the first impedance signal SI1 and the second impedance signal SI2. The coupling state between the connection interface 710 and the second connection interface 720 and the first host system 10 and the second host system 20. In step S93, the transmission control device 430 provides a corresponding operational function to at least one host system coupled to at least one of the first connection interface 410 and the second connection interface 420.

The features of many embodiments are described above to enable those of ordinary skill in the art to clearly understand the form of the specification. Those having ordinary skill in the art will appreciate that the objectives of the above-described embodiments and/or advantages consistent with the above-described embodiments can be accomplished by designing or modifying other processes and structures based on the present disclosure. It is also to be understood by those skilled in the art that <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt;

S91, S92, S93‧‧‧ steps

Claims (13)

A control method for controlling an electronic device, wherein the electronic device includes a first connection interface, a second connection interface, and a data access device, and the first connection interface and the second connection interface are coupled Receiving at least one host system, the control method includes: coupling, by at least one channel detecting device, according to at least one of the first transmission channel of the first connection interface and the second transmission channel of one of the second connection interfaces Receiving a voltage change generated by the terminal impedance of the at least one host system to generate an impedance signal; determining, according to the impedance signal, at least one of the first connection interface and the second connection interface and one of the at least one host system a coupling state, wherein the coupling state represents whether at least one of the first connection interface and the second connection interface is coupled to the at least one host system; and according to the coupling state, providing a corresponding operation function to the at least a host system; wherein when the at least one host system is coupled to the first The first transmission channel or the second transmission channel is coupled to the receiving channel of the at least one host system through a coupling capacitor, wherein the channel detecting device is used by the channel detecting device The step of detecting impedance information between the first connection interface and the at least one host system and the at least one host system to generate the impedance signal comprises: biasing the first transmission channel or the second transmission channel Pressurized to a bias voltage Pressing a current to the first transmission channel or the second transmission channel for a predetermined time according to a control signal; comparing the bias voltage and an intermediate voltage to generate a comparison signal; and at the end of the predetermined time The above comparison signal is locked to be the above impedance signal. The control method of claim 1, wherein the corresponding operation function comprises at least one of a multimedia access function, a data transmission interface function, and an information security authentication function. The control method of claim 1, wherein when the at least one host system is coupled to the first connection interface and the second connection interface according to the coupling state, the at least one host system is declared The electronic device is the same external device and provides the corresponding operation function to the at least one host system, wherein the corresponding operation function includes different operation rights to the data access device. The control method of claim 1, further comprising: using the power source of at least one of the first power channel of the first connection interface and the second power channel of the second connection interface The access device supplies power. The control method of claim 1, wherein when the first transmission channel or the second transmission channel is coupled to a terminal impedance of the at least one host system, the bias voltage exceeds the middle by the current Voltage when the first transmission channel or the second transmission channel is not coupled When the terminal impedance of the at least one host system is reached, the bias voltage does not exceed the intermediate voltage within the predetermined time. The control method of claim 5, wherein the channel detecting device detects one of the first transmission channel and the second transmission channel at different time points. The control method of claim 5, wherein when the channel detecting device detects the impedance information of one of the first transmission channel and the second transmission channel, the another channel detecting device simultaneously Detecting the impedance information of the other of the first transmission channel and the second transmission channel. The control method of claim 1, further comprising: when a first host system is coupled to the first connection interface and a second host system is coupled to the second connection interface, according to a temporary storage Storing one of the setting parameters, entering one of an automatic mode, a priority mode, a maintenance mode, and a custom mode; and according to one of the above automatic mode, the priority mode, the above maintenance mode, and the customized mode, Allowing at least one of the first host system and the second host system to perform the corresponding operational function on the data access device. The control method of claim 8, further comprising: entering the automatic mode; and coupling to the first connection interface and the second connection interface according to the first host system and the second host system respectively Sequence, allowing the first host system and one of the second host systems to access the above data The access device performs the corresponding operational functions described above. The control method of claim 8, further comprising: entering the priority mode; and preferentially allowing one of the first host system and the second host system to access the data according to one of the priority parameters. The access device performs the corresponding operational functions described above. The control method of claim 8, further comprising: entering the above maintaining mode; allowing one of the first host system and the second host system to issue a sleep request to enter a sleep mode; and allowing only the issuance One of the first host system of the sleep request and the same one of the second host system wakes up the request, and performs the corresponding operation function on the data access device. The control method of claim 8, further comprising: entering the self-customization mode; and accessing logic according to one of the setting parameters, allowing at least one of the first host system and the second host system to The data access device performs the corresponding operational functions described above. The control method according to claim 1, wherein the data access device is a USB rewritable non-volatile memory device, a USB multimedia device, a USB disk drive, a USB optical disk drive, a USB device. One of the keyboard, a USB card reader, and a USB wireless network access device.