JP2006350881A - Memory card controller and memory card control system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To optionally set a time-out processing time for each command issued by application software in order to control a memory card whose time-out processing time varies according to a command. <P>SOLUTION: A controller LSI 121 receives a command block including a command issued by a host device 110 to access the memory card 130 and time-out processing time information corresponding to the command by a command block receiving means 122 of the controller LSI 121. A command execution means 123 interprets the command according to the received command block, issues an operation command corresponding to a designated request to the memory card 130, and confirms whether the command processing is finished within the time-out processing time. Consequently, time-out time processing is performed according to the time-out processing time information from the host device 110. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a memory card control apparatus and system for controlling a memory card having a plurality of commands with different timeout processing times.

  In recent years, various portable electronic devices such as personal computers, silicon audio players, digital cameras, and mobile phones have been developed, and a memory card is often used as one of the removable storage devices of these electronic devices. As the memory card, a PC card and an SD (Secure Digital) memory card (registered trademark) are known.

  This SD memory card (registered trademark) has a security function for the purpose of protecting the copyright of contents such as music data, and protects the music data stored in the SD memory card (registered trademark) from unauthorized copying. be able to.

  Generally, such a memory card with a security function includes a controller, a user data area that is a data storage area that a user can freely access, and a secure area that is a data storage area protected by the security function. It has been.

  As an example of a method for accessing a secure area from a personal computer, direct command execution means by a memory card control device described in Patent Document 1 can be cited as an example.

The SD memory card (registered trademark) command processing time is specified by the SD Memory Card Physical Specification, and the memory card control device executes the time-out processing with a unique preset time-out processing time. I should have done it.
JP 2003-132305 A

  In recent years, a memory card (smart SD card) incorporating an IC card function has been announced, and there has been a demand for supply of a memory card control device and system corresponding to the memory card. However, the command processing time of the IC card function is not a unique value. In the conventional memory card control device in which a unique timeout processing time is set in advance, the set timeout processing time is exceeded, and the IC card function There was a problem that it was not possible to handle timeout processing of memory cards with built-in memory.

  An object of the present invention is to provide a memory card control device and a memory card control system in which a host device can arbitrarily set a command timeout processing time.

  The memory card control device of the present invention is a device for controlling a memory card, and receives a command block including a command issued by the host device for accessing the memory card and time-out processing time information corresponding to the command. And one or more operation commands required to cause the memory card to execute an operation corresponding to the request specified by the command in accordance with the received command block and the command processing within the timeout processing time. Command execution means for confirming whether or not the process ends.

  A memory card control device and a memory card control system according to the present invention provide a device and a system in which a host device can freely set a timeout processing time according to a maximum processing time arbitrarily defined by a memory card. There is an advantage that the maximum processing time of the card can be freely defined.

  Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1)
FIG. 1 is a block diagram showing a configuration of a memory card control apparatus according to Embodiment 1 of the present invention. In FIG. 1, the host device 110 is a data processing device such as a personal computer. In this embodiment, the memory card control device 120 is realized as a USB (Universal Serial Bus) device and is connected via a USB cable 117. Connected to the host device 110.

  The memory card control device 120 is provided with a controller LSI 121 for processing a command issued from the host device 110 and a memory card slot 125 for mounting the memory card 130, and the controller LSI 121 via the memory card bus 124. And the memory card 130 are electrically connected.

  The controller LSI 121 includes a command block receiving unit 122 for receiving a command block including a command issued by the host device 110 for accessing the memory card 130 and time-out processing time information corresponding to the command, and the received command One or more operation commands necessary for interpreting and executing the command according to the block and causing the memory card 130 to execute an operation corresponding to the request specified by the command are issued to the memory card 130 within the time-out processing time. Command execution means 123 is provided for confirming whether the command processing is completed.

  Next, FIG. 2 shows an example of a command block structure including timeout processing time information used in this embodiment.

  The operation code (OPERATION CODE) is a command code indicating an operation that the host device 110 wants the memory card 130 to execute. The time-out time (TIME OUT) indicates the maximum time-out time required for the operation code processing, and in this embodiment, time-out time = 100 msec × TIME OUT is shown as an example. The physical block address (LOGICAL BLOCK ADDRESS) indicates a logical address in the memory card 130 when the operation code specifies a command for reading / writing data in the memory card 130. The transfer length information (TRANSFER LENGTH) indicates the data transfer length to be read / written when the operation code specifies a command to read / write data in the memory card.

  Next, FIG. 3 shows a flowchart showing an example of the operation of the command execution means 123 used in this embodiment. The command block reception unit 121 executes command block reception in the command block reception in S110, and the command block interpretation in S121 converts the command received from the host device 110 into an operation command of the memory card 130 and the memory. An operation command is issued to the card 130. At this time, it may be necessary to issue one or more operation commands. Subsequently, in S124, it is confirmed whether or not the memory card 130 has completed the processing of the operation command within the time set by the timeout time. If it is “Pass” (Yes), the processing ends normally, and if it is “NG”. (No) executes timeout error processing.

  With the above configuration, the host device 110 can arbitrarily set the timeout processing time of the memory card control device 120 for each command block.

(Embodiment 2)
FIG. 4 is a diagram illustrating an example of a command block structure according to the second embodiment. A command block structure including flag information indicating whether or not to change the timeout processing time is shown for the first embodiment. The configuration of the memory card control device is the same as that of the first embodiment shown in FIG.

  The time-out flag (TIME OUT Flag) is flag information for selecting whether the time-out time is a time specified by TIME OUT or a unique time preset in the memory card control device 120.

  If the timeout time is set to a unique time preset in the memory card control device 120 when TIME OUT is “00”, the timeout flag can be substituted with the set value of TIME OUT.

  FIG. 5 is a flowchart showing an example of the operation of the command execution unit 123 when a command block structure including flag information indicating whether or not to change the timeout processing time shown in FIG. 4 is received. The command block reception unit 122 executes command block reception in the command block reception in S110, and the command block interpretation in S121 converts the command received from the host device 110 into the operation command of the memory card 130, and the memory. An operation command is issued to the card 130. At this time, it may be necessary to issue two or more operation commands. Subsequently, in S123, the time-out flag is confirmed. If TIME OUT Flag = “1”, the process branches to S124 to determine whether or not the end is confirmed within the set time of TIME OUT, and the time set in TIME OUT The memory card 130 confirms whether or not the processing of the operation command has been completed. If it is “Pass” (Yes), the processing ends normally, and if it is “NG” (No), timeout error processing is executed.

  In the execution of S123, if TIME OUT Flag = “0”, the process branches to S125 to determine whether or not the termination has been confirmed within the specified timeout time of the memory card control device, and is arbitrarily set by the memory card control device 120. If the memory card 130 has completed the processing of the operation command within the specified timeout time, the processing ends normally if it is Pass (Yes), and the timeout error processing is executed if it is NG (No) To do.

  With the above configuration, the host device 110 can arbitrarily set the time-out processing time of the memory card control device 120 for each command block only when it is necessary to change the time-out processing time preset in the memory card control device 120. It is possible to set to.

(Embodiment 3)
FIG. 6 shows an example of a direct command block structure including timeout processing time information used in Embodiment 3 of the present invention. The configuration of the memory card control device is the same as that of the first embodiment shown in FIG.

The operation code (OPERATION CODE) stores a code indicating that the command block is a direct command block. The command index (COMMAND INDEX) stores an operation command that directly designates an operation that the host device 110 wants the memory card 130 to execute. The subcommand (SUB COMMAND) is a parameter indicating the type of the operation command described above. The operation command type is
Command without data: Operation command that does not require any data transfer to / from the memory card 130 Command with read data: Command with operation for reading data from the memory card 130 Command with write data: Write to be written to the memory card 130 There are three types of operation commands with data.

  The argument information (COMMAND ARGUMENT) indicates variables such as address information related to the operation command. TIME OUT indicates the maximum timeout time required for the operation command processing specified by the command index described above. In this embodiment, timeout time = 100 msec × TIME OUT is shown as an example. The transfer length information (TRANSFER LENGTH) indicates the data transfer length to be read / written when the operation command specified by the command index specifies a command to read / write data in the memory card.

  Next, FIG. 7 is a flowchart showing an example of the operation of the command execution means 123 used in this embodiment. Upon receiving the direct command block in S210, the command block receiving unit 122 receives the direct command block, and issues the command index and argument information received in S221 to the memory card 130. Subsequently, in S224, it is confirmed whether or not the memory card 130 has completed the processing of the operation command within the time set by the above-described timeout time. If it is “Pass” (Yes), the processing ends normally. In the case of NG (No), timeout error processing is executed.

  With the above configuration, the host device 110 can issue an operation command that directly designates an operation that the memory card 130 wants to execute, so that even if the operation command specification of the memory card 130 is changed, the direct command issued by the host device 110 is issued. The host device 110 can arbitrarily set the time-out processing time of the memory card control device 120 for each command block.

(Embodiment 4)
FIG. 8 shows an example of a direct command block structure including flag information indicating whether to change the timeout processing time according to the fourth embodiment of the present invention. The configuration of the memory card control device is the same as that of the first embodiment shown in FIG.

  The time-out flag (TIME OUT Flag) is flag information for selecting whether the time-out time is a TIME OUT set time or a unique time set in advance by the memory card control device.

  If the time-out time is set to a unique time preset in the memory card control device when TIME OUT is “00”, the time-out flag can be substituted with the set value of TIME OUT.

  FIG. 9 is a flowchart showing an example of the operation of the command execution means 122 when a direct command block structure including flag information indicating whether or not to change the timeout processing time is received. The command block reception unit 110 executes command block reception upon reception of the direct command block at S210, and issues the command index and argument information received at S221 to the memory card 130. Subsequently, in S222, the time-out flag is confirmed. If TIME OUT Flag = "1", the process branches to S223, the end is confirmed within the set time of TIME OUT, and the memory is stored within the time set by TIME OUT. It is confirmed whether or not the card 130 has completed the processing of the operation command. If it is “Pass” (Yes), the processing ends normally. If it is “NG”, timeout error processing is executed.

  When TIME OUT Flag = “0” in the execution of S222, the process branches to S224, the end confirmation is performed within the specified timeout time of the memory card control device 120, and the rules arbitrarily set by the memory card control device 120 It is confirmed whether or not the memory card 130 has completed the processing of the operation command within the time-out period, and if it is “Pass” (Yes), the process ends normally, and if it is “NG” (No), a time-out error process is executed. .

  With the above configuration, the host device 110 can issue an operation command that directly designates an operation that the memory card 130 wants to execute, so that even if the operation command specification of the memory card 130 is changed, the direct command issued by the host device 110 is issued. Only when the time-out processing time set in advance in the memory card control device 120 is required to be changed by changing the block, the time-out processing time of the memory card control device 120 is changed to the host device 110. Can be arbitrarily set for each command block.

(Embodiment 5)
FIG. 10 shows the configuration of a memory card control system according to Embodiment 5 of the present invention, and FIG. 11 shows an example of a sequence diagram thereof.

  This memory card control system includes a host device 210 and a memory card control device 220 for connecting a memory card 230 to the host device 210. The host device 210 is a data processing device such as a personal computer, and includes a memory card application software 211, a file system 212, a unique command driver 213, a USB mass storage class driver 214, a USB driver 215, and a USB controller 216. . In the present embodiment, the memory card control device 220 is realized as a USB (Universal Serial Bus) device, and is connected to the USB controller 216 of the host device 210 via the USB cable 217.

  The application software 211 generates a command block for accessing the memory card 230 in response to a user operation, and issues the command block to the file system 212 and the unique command driver 213.

  For example, in the case of a command block supported by the Windows (registered trademark) OS as a standard, the command block is issued to the file system 212. In this case, the timeout processing time is a unique time preset in the memory card control device 220.

  When issuing a unique command, a unique command block is issued. In this embodiment, timeout information is included in the command block. FIG. 2 is an example of a command block issued to the unique command driver 213.

  The unique command driver 213 receives the command block issued from the application software 211 and transmits the command block to the USB mass storage class driver 214. At the same time, the unique command driver 213 starts a timer and receives an ACK (positive from the USB mass storage class driver). acknowledgement) Wait for the response of the signal. If there is no ACK response even after the timeout time specified in the command block has elapsed, a timeout error is returned to the application software.

  If an ACK response is received within the timeout period, a command normal end response is returned to the application software.

  The USB mass storage class driver 214, the USB driver 215, and the USB controller 216 transmit command blocks issued from the file system 212 and the unique command driver 213 to the memory card control device 220, and the NAK ( negative acknowledgement) response and ACK response are transmitted to the file system 212 and the unique command driver 213.

  The memory card control device 220 interprets the received command block, converts it into an operation command for the memory card 230, and issues an operation command to the memory card 230.

  If the memory card 230 is busy for command processing, a NAK response is sent to the USB controller 216. Further, it is detected that the command processing of the memory card 230 is completed and becomes Ready, and an ACK response is sent to the USB controller 216. In this case, the memory card control device 220 does not perform the timeout time process during the processing of this operation command.

  It is also possible to use the direct command block shown in the third embodiment for the command block.

  Furthermore, it is also possible to use a command block including timeout flag information shown in the second embodiment. In this case, the memory card control device 220 performs timeout time processing when receiving a unique command block according to the timeout flag information. Determine whether or not

  With the above configuration, the timeout processing time of the memory card control device 220 can be arbitrarily set for each command block by the application software 211 and the unique command driver 213 of the host device 210.

(Embodiment 6)
FIG. 12 shows an example of a sequence diagram of the memory card control system according to the sixth embodiment of the present invention. The configuration of the memory card control apparatus is the same as that of the fifth embodiment shown in FIG.

  When the application software 211 generates a command block for accessing the memory card 230 in response to a user operation and issues a command block including timeout information to the unique command driver 213, the unique command driver 213 A command block issued from software is received, and a timeout extension state transition command is issued to the memory card control device 220 through the USB mass storage class driver 214, the USB driver 215, and the USB controller 216. The memory card control device 220 shifts to the timeout extension state, and sends an ACK response to the unique command driver 213.

  Upon receiving an ACK response from the memory card control device 220 in response to the time-out extension command, the unique command driver 213 receives the command block received from the application software 210 through the USB mass storage class driver 214, USB driver 215, and USB controller 216, and the memory card control device. The timer is started in accordance with timeout information included in the command block.

  The memory card control device 220 interprets the received command block, converts it into an operation command for the memory card 230, and issues an operation command to the memory card 230.

  Even if the memory card 230 is processing a command and is in the Busy state, if the memory card 230 is in the time-out extended state, the memory card control device returns an ACK to the unique command driver 213.

  The unique command driver 213 issues a Busy determination command for determining whether the memory card is Busy or Ready, and the memory card control device 220 returns a response of the status of the memory card to the unique command driver 213.

  When the memory card 230 is in the Busy state, a Busy response is returned, and when the memory card 230 is in the Ready state, a Ready response is returned.

  The unique command driver 213 performs polling by issuing a Busy check command until the response reply from the memory card control device 220 becomes Ready or the timeout time elapses.

  When the unique command driver 213 receives a response of Ready within the timeout time, it notifies the application software 211 of the end of the normal command and ends the command processing of the application software 213. Further, the unique command driver 213 issues a timeout extension state return command to the memory card control device 220, and the memory card control device 220 returns from the timeout extension state to the normal state and returns an ACK to the unique command driver 213. I do.

  When the timer of the unique command driver 213 exceeds the timeout time, a timeout error is transmitted to the application software 211 and the error processing of the application software 211 is executed. Further, the unique command driver 213 instructs the memory card control device 220. The memory card control device 220 issues a timeout extension state return command, returns from the timeout extension state to the normal state, and returns an ACK to the unique command driver 213.

  It is also possible to use the direct command block shown in the third embodiment for the command block.

  Furthermore, it is also possible to use a command block including timeout flag information described in the second embodiment. In this case, according to the timeout flag information, the unique driver 213 issues a timeout extension state transition command and performs timer activation. Judgment is made.

  With the above configuration, even when the USB mass storage class driver 214, the USB driver 215, and the USB controller 216 execute the timeout time processing independently, the timeout setting of the USB mass storage class driver 214, the USB driver 215, and the USB controller 216 is performed. The time-out processing time of the memory card control device 220 can be arbitrarily set for each command block by the application software 211 and the unique command driver 213 of the host device 210 without being limited in time.

  A memory card control device and a memory card control system according to the present invention provide a device and a system in which a host device can freely set a timeout processing time according to a maximum processing time arbitrarily defined by a memory card. This has the advantage that the maximum processing time of the memory card can be freely defined, and is useful for various devices, devices, and systems that control memory cards with different timeout processing times according to commands.

1 is a block diagram showing a configuration of a memory card control device according to Embodiment 1 of the present invention. The figure which shows an example of the command block structure containing the time-out process time information used in the memory card control apparatus The flowchart which shows the procedure of the command block process containing the time-out process time information performed with the memory card control apparatus The figure which shows an example of the command block structure containing the timeout flag information used in the memory card control apparatus by Embodiment 2 of this invention A flowchart showing a procedure of command block processing including timeout flag information executed in the memory card control device The figure which shows an example of the direct command block structure containing the time-out process time information used in the memory card control apparatus by Embodiment 3 of this invention. The flowchart which shows the procedure of the direct command block process containing the time-out process time information performed with the memory card control apparatus The figure which shows an example of the direct command block structure containing the timeout flag information used in the memory card control apparatus by Embodiment 4 of this invention Flowchart showing the procedure of direct command block processing including timeout flag information executed by the memory card control device Block diagram showing a configuration of a memory card control system according to a fifth embodiment of the present invention. Sequence diagram of the memory card control system Sequence diagram of a memory card control system according to a sixth embodiment of the present invention

Explanation of symbols

110, 210 Host device 117, 217 USB cable 120, 220 Memory card control device 121, 221 Controller LSI
122, 222 Command block reception means 123, 223 Command execution means 124, 224 Memory card bus 125, 225 Memory card slot 130, 230 Memory card 211 Memory card application software 212 File system 213 Unique command driver 214 USB mass storage class driver 215 USB driver 216 USB controller

Claims (10)

A device that controls memory cards with different timeout processing times depending on the command,
Means for receiving a command block including a command issued by the host device for accessing the memory card and time-out processing time information corresponding to the command;
In accordance with the received command block, one or more operation commands required to cause the memory card to execute an operation corresponding to the request specified by the command are issued to the memory card, and the time is within the timeout processing time. A memory card control device comprising: command execution means for confirming whether command processing is completed. The timeout processing time information includes flag information indicating whether the timeout processing time needs to be changed,
The command execution means includes
When the flag information indicates that it is necessary to change the timeout processing time, one or more operation commands necessary for causing the memory card to execute an operation corresponding to the request specified by the command are stored in the memory. Means for issuing to a card and confirming whether the command processing is completed within the timeout processing time;
2. The memory card control device according to claim 1, further comprising means for executing processing at a preset timeout time when the flag information indicates that it is not necessary to change the timeout processing time. . A device that controls memory cards with different timeout processing times depending on the command,
Means for receiving a direct command block, which is issued by the host device for accessing the memory card and includes an operation command for directly specifying an operation to be executed by the memory card and time-out processing time information corresponding to the command; ,
A memory card control device comprising: direct command execution means for issuing the operation command included in the received direct command block to the memory card and confirming whether the command processing is completed within the timeout processing time. The timeout processing time information includes flag information indicating whether the timeout processing time needs to be changed,
The direct command execution means includes
When the flag information indicates that the timeout processing time needs to be changed, the operation command included in the received direct command block is issued to the memory card, and the command processing is completed within the timeout processing time. A means of confirming,
4. The memory card control device according to claim 3, further comprising means for executing processing at a preset timeout time when the flag information indicates that it is not necessary to change the timeout processing time. . A system including application software, driver software, and a memory card control device that controls memory cards with different timeout processing times according to commands,
The application software includes command block issuing means for issuing a command block including a command issued to the memory card according to a user operation and time-out processing time information necessary for the command processing by the memory card,
The driver software includes a means for receiving a command block issued from the command block issuing means, a command issuing means for issuing the received command to the memory card control device, and a timeout processing time designated by the command block. And a timer for managing the timeout setting time in
The memory card control device issues means for receiving the command and one or more operation commands required to cause the memory card to execute an operation corresponding to the request specified by the command. Command execution means,
The memory card control system, wherein the driver software comprises means for notifying the application software of a timeout error when the timer detects that the timer has exceeded the timeout processing time. A system including application software, driver software, and a memory card control device that controls memory cards with different timeout processing times according to commands,
The application software issues an operation command that is issued to the memory card in response to a user operation and directly specifies an operation to be executed by the memory card, and time-out processing time information that the memory card requires for the command processing. Including a direct command block issuing means for issuing a direct command block including:
The driver software includes means for receiving a direct command block issued from the direct command block issuing means, command issuing means for issuing the operation command included in the received direct command block to the memory card control device, A timer for managing a timeout setting time with a timeout processing time specified in the direct command block,
The memory card control device comprises means for receiving the direct command block, and operation command issuing means for issuing the operation command included in the received direct command block to the memory card,
The memory card control system, wherein the driver software comprises means for notifying the application software of a timeout error when the timer detects that the timer has exceeded the timeout processing time. The driver software is preset in the memory card control device and a determination means for determining whether the timeout processing time specified in the command block is longer than the timeout time preset in the memory card control device. Means for setting flag information indicating whether the timeout period needs to be changed,
If the time-out processing time specified in the command block is longer than the time-out time preset in the memory card control device, the flag information is set to unlimited time-out time, and if it is short, the time-out time is set in the memory card control device. As flag information of timeout time set in advance,
7. The memory card control system according to claim 5, wherein the memory card control device makes a timeout processing time unlimited according to the flag information, or performs a preset timeout time processing. 8. . A system including application software, driver software, and a memory card control device that controls memory cards with different timeout processing times according to commands,
The application software includes command block issuing means for issuing a command block including a command issued to the memory card in response to a user operation and time-out processing time information necessary for the command processing by the memory card,
The driver software includes means for receiving a command block issued from the command block issuing means, time-out extended state transition command issuing means for shifting the memory card control device to a time-out extended state, and receiving the received command in the memory. A command issuing means for issuing to the card control device, a timer for managing the timeout setting time by the timeout processing time specified in the command block, a busy determining command issuing means for determining whether the memory card is busy, and the memory A timeout extension state return command issuing means for returning the card control device from the timeout extension state to the normal state;
The memory card control device issues to the memory card at least one operation command necessary for causing the memory card to execute an operation corresponding to the request specified by the command and the timeout extension state transition means. Whether the memory card is busy by the operation command issuing means and the command completion response means for notifying the completion of the command and the operation command issuing means even when the operation command is busy during the transition to the timeout extended state. Busy state determination means for determining whether or not, and timeout extension state return means,
The driver software determines whether the memory card is busy by the busy determination command issuing means, and when the timer detects that the timeout processing time has been exceeded, the driver software notifies the application software of a timeout error. A memory card control system comprising: means for performing A system including application software, driver software, and a memory card control device that controls memory cards with different timeout processing times according to commands,
The application software issues a direct command block including an operation command that directly designates an operation to be executed by the memory card according to a user operation and time-out processing time information necessary for the command processing by the memory card. Including direct command block issuing means,
The driver software includes a means for receiving a direct command block issued from the direct command block issuing means, a timeout extended state transition command issuing means for shifting the memory card control device to a timeout extended state, and the received direct command block. A command issuing means for issuing the operation command included in the memory card control device to the memory card control device, a timer for managing a timeout setting time in a timeout processing time specified in the direct command block, and determining whether the memory card is busy Busy determination command issuing means, and timeout extension state return command issuing means for returning the memory card control device from the timeout extension state to the normal state,
The memory card control device includes the timeout extension state transition means, means for receiving the direct command block, and operation command issuing means for issuing the operation command included in the received direct command block to the memory card; During the transition to the time-out extended state, even when the operation command is busy, a command completion response means for notifying the completion of the command and a busy state for determining whether the memory card is busy by the operation command issuing means Determining means, and timeout extension state return means,
The driver software determines whether the memory card is busy by the busy determination command issuing means, and notifies the application software of a timeout error when detecting that the timer has exceeded the timeout processing time. A memory card control system characterized by comprising: The driver software is preset in the memory card control device and a determination means for determining whether the timeout processing time specified in the command block is longer than the timeout time preset in the memory card control device. Means for setting flag information indicating whether the timeout period needs to be changed,
If the time-out processing time specified in the command block is longer than the time-out time preset in the memory card control device, the flag information is set to unlimited time-out time, and if it is short, the time-out time is set in the memory card control device. As flag information of timeout time set in advance,
10. The memory card control system according to claim 8, wherein the memory card control device makes a timeout process time unlimited according to the flag information, or performs a preset timeout time process. .

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