TW200809654A - Method of effectively accessing the memory card interfered by ESD and card reader - Google Patents

Abstract

The present invention provides a card reader capable of effectively accessing a memory card interfered by ESD (Electrostatic Discharge), which is applied in transferring the read/write commands of a computer to a memory card interfered by ESD. The card reader comprises a transmission interface electrically connected to the computer and a control unit. The control unit is electrically connected to the memory card and the transmission interface. During transferring the read/write commands of a computer to a memory card, the control unit determines if the memory card responses overdue, and stops supplying power to the memory card. After the memory card discharges, the control unit continues to supply power to the memory card for executing the read/write commands.

Description

200809654 IX. Description of the Invention: [Technical Field] The present invention relates to a card reader, particularly a card reader capable of efficiently storing a memory card that is subject to electrostatic discharge (ESD) interference. [Prior Art] Referring to Figure 1, a conventional card reader 7 includes a control unit 71, a transmission interface 72, a socket 73, and a guard member 74. An external memory card 8 can be inserted into the slot 73, and the memory card 8 has a microprocessor/or finite state machine (not shown) and a basic static protection component (not shown). The control unit 71 of the card reader 7 communicates with a computer 9 via a transmission interface 72. And the protective element 74 protects the control unit 71 from external static interference.爹阅圃 i Xingtu

When the control unit of the card reader 7 receives the command from the computer 9, it reads or writes the memory card 8 inserted in the slot 73. The result of the successful reading is transmitted to the computer 9 through the transmission interface 72. Referring to Fig. 1 and Fig. 3, when the fire is fired or the slot 73 is pulled out, the user material = the user inserts the memory card 8, and the hand of the person, the hand of the person is bound to contact the memory card 8 to accumulate on the body. The electrostatic discharge to the memory card 8 has a basic static element: 5 However, when the electrostatic strength of the two markets is greater than the protective capacity of the product, but when the user releases the effect, and the step-by-step causes the 8 f to make the operation of the protection function of the card 8 σσ, the operation is disturbed, 5 200809654 It is not possible to promptly return the command from the control unit 71 of the card reader 7. Therefore, when the (4) unit 71_memory card 8 of the card reader 7 responds, the result of the read/write failure is transmitted to the electric moon through the transmission interface 72. On the other hand, the computer 9 cannot successfully perform the read/write operation even if the control unit 71 of the card reader 7 is re-executed. Finally, the computer 9 can only inform the user of the error message. When the user sees the error message, the memory card 8 may be repeatedly pulled out/inserted into the slot 73' or the operation of accessing the memory card 8 may be repeatedly performed, but the memory of the memory + 8 has been wrong. |L, almost no commands can be received, so even if the user repeatedly operates, it may not be successful and cause the computer 9 to display an error message again. Repeated error messages will cause the user to worry about whether the memory card 8 or the card reader 7 has failed. Since the user often needs to touch the memory card 8, the discharge of the static electricity to the memory card 8 is quite frequent, especially in a dry climate, so the conventional card reader 7 cannot effectively handle the memory disturbed by the electrostatic discharge. Card 8, will cause great inconvenience in use. SUMMARY OF THE INVENTION Accordingly, (4) of the present invention provides a card reader that can still read a memory card in the case where the memory card encounters static interference. Yet another object of the present invention is to provide a method for efficiently accessing a memory card that is subject to electrostatic discharge. Thus, the card reader of the present invention capable of effectively accessing a card which is interfered by electrostatic discharge is suitable for transferring a read/write command of a computer to a memory card which is subjected to electrostatic discharge. And the card reader comprises a transmission interface electrically connected to the computer and a control unit. 6 200809654 When the early TGHq card is used and the memory card is transmitted, it is judged whether the memory card: = and when the memory card expires, the power supply is stopped until the memory card is discharged, and the power supply is continued. Give the 2 = line read/write action. m continued and the present invention can effectively access the static method including the following steps:

(4) When the card reader is transferred to the computer - the read/write command of the computer is given to the memory card that is subjected to the discharge interference, it is judged whether the memory card has responded to the timeout; and (8) the card is read when the memory card expires. The machine stops supplying power to the memory card, and waits until the bridge is discharged from the + μ ^ card to continue to supply power to the card to perform read/write operations. The above and other technical contents, features, and advantages of the present invention will be apparent from the following detailed description of the preferred embodiments. 4, FIG. 4 is a schematic diagram of an embodiment of a card reader 1 capable of effectively accessing a memory card subjected to electrostatic discharge interference. The card reader i includes a control unit 11, a transmission interface 12 and a slot 13. The control unit 11 of the card reader 1 communicates with a computer 3 via the transmission interface 12. The external memory card 2 can be inserted into the slot 13, and the memory card 2 has a broken handle/or limited anger machine (not shown) and a basic static protection element (not shown). Please note that the memory card 2 can be a CF (CompactFlash) flash memory card, an mMC (Multi Media Card) card 200809654, an SD (Secure Digitai) card, etc., but the scope of application of the present invention is not limited thereto. Referring to FIG. 4 and FIG. 5, when the card reader has effective access to the memory card interfered by the electrostatic discharge, the operation of the card reader includes the following steps: Step 50: The card reading The control unit n of the machine i receives the read/write command transmitted from the computer 3 through the transmission interface a; Step 51: The control unit u of the card reader} translates the received read/write command; #Step 52: The card reader 1 The control unit η transmits the translated read/write command to the memory card 2 inserted in the slot 13; Step 53 The control unit n of the card machine i determines whether the response of the memory card 2 is out of time, and if not, jumps Go to step 54; if yes, skip to step 55 factory step 54: the control unit n of the card reader i receives the response of the memory card 2 and returns it to the computer 3; " Step 55: The control unit of the card reader 1 stops Supply power to the memory card 2, and then re-supply the power to the memory card 2 after a predetermined time. The owner notices that the predetermined time is usually more than 100 milliseconds, but is not limited to the two-use usage adjustment; Step 56: The control unit of the card reader i attempts to initialize the memory card 2, the initialization process package Actions such as addressing (add jobs), these actions are not the focus of the present invention, so it will not be described here; Step 57: The control unit n of the card reader i determines whether the initialization is successful, and if so, skips to step 58; Otherwise, skip to step 55; 200809654 students' and ask the computer 3 to re-send a read/write command. In summary, the control unit n of the present embodiment finds the memory card 2, step 58: the control unit u of the card reader 1 notifies the electric contact 3 that an error has occurred.

When it is subjected to static electricity higher than its own protection capability, the power supply to the memory card 2 is temporarily stopped, so that the memory card 2 is completely discharged and returned to the state in which it can be stably operated. Even if the memory card .2 is again subjected to another electrostatic discharge disturbance during the initialization process, the control unit n can return the memory + 2 to the steady state by repeatedly performing the action of turning off the power. During the repeated discharge of the power supply, the user will not see any error message on Μ 3 and will not find that the memory + 2 is subject to static electricity. The card reader ^ will operate on its own and automatically complete the card reading task. The object of the present invention is improved. It should be noted that the card reader 1 can also enhance the self-protection electrostatic discharge like the conventional card reader 7 (refer to FIG. 1 'including the protective element 74 and special wiring processing on the circuit board'). The ability to interfere is merely a preferred embodiment of the present invention, and is not intended to limit the scope of implementation of the present invention, that is, the simplicity of the present invention: the simplicity of the Legan Wai and the description of the invention The equivalent changes and modifications are still within the scope of the patent of the present invention. [Simplified description of the drawing] 丄1 system block diagram illustrating the use of a conventional card reader and a computer and memory card; 2 is an intention to explain the normal operation of the conventional card reader 9 200809654 _ 3 is a schematic diagram illustrating the state of the power amplifier; m the known card reader in accessing the memory card interfered by the town; The month r _ 4 is a system block diagram electric discharge port. The preferred embodiment of the invention is capable of effectively accessing the card reader surface of the memory card interfered by the static rabbit, and the reading is performed with a computer and a memory card. Use case; and Figure 5 is a process Described method of the present invention is effective electrostatic discharge interference of access to the card by the preferred embodiment.

10 200809654 [Description of main component symbols] 1 Card reader 2 Memory card 11 Control unit 3 Computer 12 Transmission interface 50 to 58 Step 13 Slot

11

Claims (1)

200809654 X. Application for Patent Park: 读 A card reader that effectively accesses text to one of the electrostatic discharge interference cards. The card reader transfers a computer read/write command to a memory card that is subject to electrostatic discharge interference. The card reader comprises: a transmission interface electrically connected to the computer; a control unit it electrically connected to the memory card and the transmission interface, and determining the memory when the transfer/write command is given to the memory card Whether the card responds over time, and when the memory card times out, the power supply to the memory card is stopped. 2. The card reader of claim 1, wherein the control unit continues to supply power to the memory card after the memory card is discharged to continue the read/write operation. 3. The card reader of claim 2, wherein the control unit initializes the memory card when continuing to supply power to the memory card. 4. The card reader according to claim 3, wherein after the memory is initialized, the control unit notifies the card that an error has occurred through the transmission interface, and requests the computer to resend the command to continue reading. The operation of the card reader according to claim 3, wherein if the memory card cannot be initialized, the control unit stops supplying power to the memory card, and waits until the memory card is discharged again. Power is supplied to the memory card, and the action of providing/not supplying power is repeated until the memory card is successfully initialized. 12 200809654 -6. The card reader according to claim 5, wherein after the memory card is initialized, the control unit notifies the computer that an error has occurred, and the computer requests the computer to resend the command to continue reading. / write action. 7. The card reader of claim 6, wherein the control unit provides power to the memory card for at least one second per person. 8. A method for effectively accessing a memory card interfered by electrostatic discharge, comprising the steps of: " Beka machine transferring a read/write command of a computer to a memory card subjected to electrostatic discharge; determining whether the memory card is Timeout response; if the memory card responds in time, the card reader stops supplying power to the memory card; after the memory card is discharged, power is supplied to the memory card; and the read/write operation is continued. # 9. The method of claim 8, wherein the supply of power to the memory card is stopped for at least 100 milliseconds. ... According to the method described in item 8, according to the towel, the other includes: initializing the memory card. u. According to the method described in Section 1G of the special application, the method further comprises: notifying the computer that an error has occurred, and requesting the computer to resend the command, so that the card reader continues to read/write. 12. The method according to claim 10, further comprising: when the hidden card cannot be initialized, stopping supplying power to the memory card, and continuing to provide power to the memory after the 13 200809654 memory card is discharged again Memory card, and repeat this action of providing/not supplying power until the memory card is successfully initialized. 1 3 According to the method of claim 12, the method further comprises: after the memory card is initialized, notifying the computer that an error has occurred, and requesting the computer to resend the command to continue the read/write operation. 14. The method of claim 10, wherein the time to stop supplying power to the memory card is at least 1 millisecond. 14