WO2004061636A1 - Usb装置およびusb装置の制御方法 - Google Patents
Usb装置およびusb装置の制御方法 Download PDFInfo
- Publication number
- WO2004061636A1 WO2004061636A1 PCT/JP2002/013820 JP0213820W WO2004061636A1 WO 2004061636 A1 WO2004061636 A1 WO 2004061636A1 JP 0213820 W JP0213820 W JP 0213820W WO 2004061636 A1 WO2004061636 A1 WO 2004061636A1
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- WIPO (PCT)
- Prior art keywords
- usb
- state
- receiver
- reset
- signal
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Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/38—Information transfer, e.g. on bus
- G06F13/40—Bus structure
- G06F13/4063—Device-to-bus coupling
- G06F13/4068—Electrical coupling
- G06F13/4072—Drivers or receivers
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/38—Information transfer, e.g. on bus
- G06F13/42—Bus transfer protocol, e.g. handshake; Synchronisation
- G06F13/4247—Bus transfer protocol, e.g. handshake; Synchronisation on a daisy chain bus
- G06F13/426—Bus transfer protocol, e.g. handshake; Synchronisation on a daisy chain bus using an embedded synchronisation, e.g. Firewire bus, Fibre Channel bus, SSA bus
Definitions
- the present invention relates to a USB (universal 'serial' bus) device, and more particularly to a USB device compatible with the USB 2.0 standard, which is faster than the US 1.1 standard.
- USB universal 'serial' bus
- USB 2.0 compatible device a USB host (hereinafter referred to as HS host) compatible with the USB 2.0 standard and a USB device connected to it (hereinafter referred to as USB 2.0 compatible device) have been put into practical use.
- HS host a USB host
- USB 2.0 compatible device many do not strictly comply with the USB 2.0 standard. Therefore, there is a need for a USB 2.0 compatible device that can be connected to such a USB 2.0 non-compliant HS host in a high-speed mode with a transfer rate of 480 Mbps.
- the USB 2.0 compatible device is connected to the USB host in a high speed mode or a full speed mode with a transfer speed of 12 Mbps, depending on the standard of the host.
- FIG. 7 is a diagram showing a change in the USB bus when the high speed mode is selected during the handshake during reset
- FIG. 8 is a diagram showing the USB bus when the full speed mode is selected.
- the voltage of the D + signal of the USB bus is 3. OV, and the voltage of the D— signal is OmV.
- the reset assertion period starts. In the SEO state, the voltage on both the D + and D- signals will be less than 80 OmV.
- USB 2 in case of reset . 0 compatible device, the voltage of D- signal becomes 80 OmV (Chirp K). This caption indicates to the host that the USB 2.0 compatible device is compatible with the high speed mode.
- the state returns to the SE0 state, which is a transition section for switching the signal output side from the USB 2.0 compatible device side to the USB host side.
- the USB 2,0 compatible device waits for a response from the US host.
- the USB host transits to the high-speed mode, as shown in Fig. 7, the USB host changes the D- signal voltage to 80 OmV (chart K) and the D + signal power.
- the state where the pressure becomes 90 OmV (Charge J) is alternately repeated.
- the state returns to the SE0 state, the reset is completed, and the idle state of the high-speed mode is set.
- the USB 2.0 compatible device After the transition section after the chirp K by the USB 2.0 compatible device, if the alternate chirp K and the chirp J by the USB host are not detected, the USB 2.0 compatible device will Recognizes that the reset has been completed by a USB host (FS host) that complies with the USB 1.1 standard. As a result, the vehicle enters the idle state in the full speed mode.
- FS host USB host
- Tiny J is defined as D + by the state of the pull-up resistor 21 and pull-down resistors 11, 12 and 12 'of the USB host 1 and USB device 2 during the USB reset and the state of the input / output terminals. That is, the signal voltage becomes about 70 to 23 OmV.
- the conventional USB 2.0 compatible device has the following problems because its threshold level is 100 to 15 OmV. That is, resetting In the handshake, when the voltage of the D + signal becomes about 70 to 23 OmV due to the ternary J as described above, the D + signal may be high even though it is originally at a low level. In this case, since the D + signal is high and the D— signal is low, the USB 2.0 compatible device recognizes that the reset of the FS host has ended, and incorrectly recognizes the HS host as the FS host. would. As a result, there was a problem when connecting to the HS host in the full speed mode.
- the present invention has been made in view of the above-mentioned problems, and prevents the detection of Tiny J, and correctly recognizes that a USB 2.0 non-compliant HS host is an HS host.
- An object of the present invention is to provide a device compatible with USB 2.0 that can be connected in a high speed mode.
- Another object of the present invention is to prevent detection of Tiny J, to correctly recognize that the host is an HS host even if the host is not compatible with USB 2.0 and connect in a high-speed mode.
- An object of the present invention is to provide a control method for a USB 2.0 compliant device. Disclosure of the invention
- the present invention is characterized by the following.
- the timer counts the duration of the SEO state of the USB bus, and asserts the SEO 3 ms detection signal to the reset determination circuit when the thread continues for 3 ms or more.
- the reset discrimination circuit closes the switch, connects a bull-up resistor to the D + signal line of the USB path, detects the state of the USB path, and recognizes a reset if it is in the SEO state.
- the reset detection signal is asserted to the reset control circuit.
- the reset control circuit asserts a threshold level change signal to the receiver for the high speed mode. The receiver changes the threshold to a value higher than the USB bus voltage in the Tiny J state, for example, 25 OmV.
- the reset control circuit negates the threshold level change signal to the receiver when detecting that the USB bus is in the K state.
- the receiver sets the threshold Return to 125mV. In this way, it recognizes that the connection destination of the USB 2.0 compatible device is the HS host.
- the threshold value of the receiver for the high-speed mode is changed to a value higher than the voltage of the USB bus in the Tiny J state, so that the Tiny: [ The response from the USB host can correctly detect that the USB bus has entered the K state.
- FIG. 1 is a block diagram showing an example of a main part of a USB device according to the present invention
- FIG. 2 is a block diagram showing an example of a receiver of a USB device according to the present invention
- FIG. FIG. 4 is a block diagram showing another example of the receiver of the USB device according to the present invention.
- FIG. 4 is a block diagram showing still another example of the receiver of the USB device according to the present invention.
- FIG. 5 is a flowchart showing an example of control of the USB device according to the present invention at the time of handshaking
- FIG. 6 is a flowchart showing another example of control of the USB device according to the present invention at the time of handshaking. Yes, Fig.
- FIG. 7 shows the USB bus changes when the high speed mode is selected during the handshake during reset
- Fig. 8 shows the full speed mode during the handshake during reset.
- FIG. 9 is a block diagram showing a main part of the USB host and the USB device in the Tiny J state. BEST MODE FOR CARRYING OUT THE INVENTION
- FIG. 1 is a block diagram showing an example of a main part of a USB 2.0 compatible device according to the present invention.
- the USB 2.0 compliant device includes a reset detecting means including an SE0 timer 3, a suspend / reset discriminating circuit 4, a switch 5, and a bull-up resistor 6, and a reset control circuit 7.
- Receiver for high speed mode Has eight is shown in FIG. 1, the USB 2.0 compliant device includes a reset detecting means including an SE0 timer 3, a suspend / reset discriminating circuit 4, a switch 5, and a bull-up resistor 6, and a reset control circuit 7.
- Receiver for high speed mode Has eight Receiver for high speed mode Has eight.
- SE0 timer 3 always counts the duration of the USB bus SE0 state.
- the SE0 timer 3 asserts the SEO 3ms detection signal to the suspend / reset determination circuit 4 when the counter value from the start of the SE0 state becomes 3 ms or more.
- the suspend Z reset determination circuit 4 closes the switch 5 and connects the pull-up resistor 6 to the D + signal line. Then, the suspend / reset determination circuit 4 recognizes a reset if the state of the USB bus when the bull-up resistor 6 is connected is SE0, and recognizes a suspend if it is not SE0. The suspend / reset discriminating circuit 4 asserts a reset detection signal to the reset control circuit 7 when recognizing the reset.
- the reset control circuit 7 When the reset detection signal is asserted, the reset control circuit 7 asserts a threshold level change signal to the receiver 8.
- the receiver 8 changes the threshold level of the receiver 8 when the threshold level change signal is asserted. Further, the receiver 8 outputs the SE0 signal, the J signal indicating the J state, or the K signal indicating the K state according to the D + signal and the D ⁇ signal.
- the reset control circuit 7 recognizes the J signal or the K signal output from the receiver 8 and restores the threshold level of the receiver 8 to the original level.
- SE0 timer 3 recognizes the SE0 signal output from receiver 8.
- FIG. 2 is a block diagram showing a first example of the internal configuration of the receiver 8.
- the receiver 8 includes a normal receiver 81 having a threshold value of, for example, 125 mV, a Tiny J receiver 82 having a threshold value of, for example, 25 OmV, and a selector 83.
- the D + signal and the D— signal are typically supplied to both the receiver 81 and the Tiny J receiver 82.
- the receiver 81 will normally have a threshold of 125mV and the Tiny J receiver 82 will have a 25 OmV threshold based on the SE0 and J0 signals to the selector 83, respectively.
- Assert signal and K signal Negative Specifically, the normal receiver 81 and the Tiny J receiver 82 assert the SEO signal (SEO state) if both the D + signal and the D— signal are less than 80 OmV, for example. If is greater than, for example, 80 OmV, the SEO signal is negated.
- the normal receiver 81 and the Tiny J receiver 82 assert the J signal (K signal is negated) if the D + signal is equal to or greater than the respective threshold, and the D ⁇ signal is equal to or greater than the respective threshold. Assert K signal (J signal is negated).
- the selector 83 selects the output signal of the Tiny J receiver 83 if the threshold level change signal supplied from the reset control circuit 7 has been asserted, and if the threshold level change signal has been negated. Usually, the output signal of the receiver 81 is selected.
- FIG. 3 is a block diagram showing a second example of the internal configuration of the receiver 8. As shown in FIG. In the example shown in FIG. 3, the receiver 8 includes a selector 91, an absolute value output subtractor 92, a comparator 93, a determiner 94, and a receiver 95 for SE0.
- the selector 91 selects, for example, a threshold of 25 O mV for Tiny J if the threshold level change signal supplied from the reset control circuit 7 is asserted, and if the threshold level change signal is negated. For example, a threshold of 125 mV is selected for normal operation.
- the absolute value output subtractor 9 2 generates the absolute value of the difference between the voltage of the D + signal and the voltage of the D— signal, that is, the value of I ([D + signal]-[D—signal]) 1 and the D + signal Find the sign when the voltage of the D- signal is subtracted from the voltage of.
- the comparator 93 compares the threshold value selected by the selector 91 with the absolute value supplied from the absolute value output subtracter 92.
- Judgment unit 94 judges the J state or the K state based on the comparison result of comparator 93 and the sign supplied from absolute value output subtractor 92. Specifically, when the absolute value is equal to or greater than the threshold, the signal is asserted if the sign is positive, the K signal is negated (J state), and if the sign is negative, the J signal is negated and Assert the signal (K state). On the other hand, when the absolute value is smaller than the threshold, It is effective.
- the receiver for 3 £ 0 asserts the SE0 signal (SE0 state) if the D + signal and the D— signal are both less than 80 OmV, for example, and SE0 signal if one of them is more than 80 OmV, for example. Negates.
- FIG. 4 is a block diagram showing a third example of the internal configuration of the receiver 8.
- the receiver 8 includes an A / D converter 101 for converting a D + signal to a digital signal, an A / D converter 102 for converting a D- signal to a digital signal, and an AZD converter 101, 102
- the arithmetic unit 103 asserts or negates the SE0 signal, the J signal, and the K signal according to the output value (digital conversion value) and the threshold level change signal supplied from the reset control circuit 7.
- Arithmetic unit 103 asserts the SE0 signal (SE0 state) if the digitally converted value of the D + signal and the digitally converted value of the D— signal are both smaller than 80 OmV, for example. If this is the case, negate the SE0 signal. Arithmetic unit 103 asserts the J signal (K signal is negated) when the digital conversion value of the D + signal is 15 OmV or more, for example, and sets the digital conversion value of the D signal to 150 mV or more, for example. Assert the K signal (the J signal is negated) at the time of and set it to the K state. It is invalid when both the digitally converted value of the D + signal and the digitally converted value of the D— signal are smaller than, for example, 15 OmV.
- FIG. 5 is a flowchart showing a first example of control at the time of handshake.
- the SEO timer 3 starts counting the duration of the SEO state.
- the SEO timer 3 asserts the SE 03 ms detection signal to the suspend / reset discriminating circuit 4 when the SEO state has continued for, for example, 3 ms or more (step S 501: Yes).
- the suspend / reset discriminating circuit 4 closes the switch 5 and the D + signal line Is connected to pull-up resistor 6 (step S502). Then, the suspend / reset determination circuit 4 determines whether the USB path is in the SE0 state or not (Step S503). As a result, if the USB bus is in the SE0 state (Step S503: Yes), the suspend Z reset determination circuit 4 recognizes that the host state is reset, and asserts the reset detection signal to the reset control circuit 7. I do.
- the reset control circuit 7 asserts a threshold level change signal to the receiver 8 for the high-speed mode. Accordingly, the receiver 8 changes the threshold value to, for example, 250 mV (step S504). Subsequently, the driver (omitted in FIG. 1) asserts the signal D— to execute the chirp drive K (step S505). Next, the driver negates the D- signal, terminates the chirp drive K, and holds the USB bus in the SE0 state until the USB path goes to the J state or the K state (step S506).
- step S508 when the reset control circuit 7 detects that the USB bus has entered the K state (step S508: Yes), the reset control circuit 7 negates the threshold level change signal to the receiver 8. Accordingly, the receiver 8 for the high-speed mode returns the threshold value to, for example, 125 mV (step S509). In this way, it is recognized that the connection destination of the USB 2.0 compatible device is the HS host (step S510), and the handshake ends and the reset ends.
- the reset control circuit 7 detects that the USB bus is in the J state (step S507: Yes), and changes the threshold level to the receiver 8 for the high speed' mode. Negate the signal. Then, the receiver 8 for the high-speed mode returns the threshold value to, for example, 125 mV (step S
- connection destination of the USB 2.0 compatible device is the FS host (step S512), and the handshake ends and the reset ends.
- step S 506 may, J
- the threshold value of the receiver 8 for the high-speed mode is returned to, for example, 125 mV (step S511), and the FS host is recognized (step S512).
- the handshake ends, and the reset ends.
- the suspend Z reset determination circuit 4 determines that the host state is in the suspend state. Recognition (step S513), and the handshake ends.
- FIG. 6 is a flowchart showing a second example of control at the time of handshake. As shown in FIG. 6, when a handshake during reset is started, steps S601 to S605 are sequentially performed. Steps S601, S602, S603, S604, and S605 are the same as steps S501, S502, S503, S504, and S505 of the first control example, respectively. A duplicate description will be omitted.
- step S606 the reset control circuit 7 sets the USB bus to the K state.
- step S607: Yes the threshold level change signal is negated to the receiver 8 for the high speed mode.
- the high-speed mode receiver 8 returns the threshold value to, for example, 125 mV (step S608).
- the connection destination of the USB 2.0 compatible device is the HS host (step S609), the handshake ends, and the reset ends.
- Step S606 Yes
- the host is the FS host
- Step S610 the handshake ends, and the End.
- step S611 the suspend / reset determination circuit 4 indicates that the host state is suspended.
- the threshold of the receiver 8 for the high-speed mode is changed to a value higher than the voltage of the USB bus in the Tiny J state, for example, 25 OmV. It is possible to correctly detect that the USB bus has entered the K state by the response from the USB host without detecting the USB bus. Therefore, it is possible to correctly recognize the HS host and connect in the high-speed mode without erroneously recognizing the HS host as the FS host.
- the present invention is not limited to the above-described embodiment, but can be variously modified.
- the threshold value of the receiver 8, the detection time of the SEO state, and the like can be variously selected according to the USB standard.
- the threshold value of the receiver 8 after reset is not limited to 125 mV, and may be any value within the USB standard.
- the threshold value of the high-speed mode receiver is changed to a value higher than the USB bus voltage in the Tiny J state. Without detecting J, it is possible to correctly detect that the USB bus is in the K state by the response from the USB host. Therefore, it is possible to correctly recognize the HS host and connect in the high-speed mode without erroneously recognizing the HS host as the FS host.
- the present invention prevents the detection of Tiny J, and even if the host is not compatible with USB 2.0, correctly recognizes that it is an HS host and can connect in the high-speed mode. Suitable for providing possible USB 2.0 compatible devices . Also, the present invention prevents the detection of Tiny J, and correctly recognizes that the host is an HS host even if it is a USB 2.0 non-compliant HS host. It is suitable for providing a control method for a 0-compatible device.
Abstract
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Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP02793451A EP1580648A4 (en) | 2002-12-27 | 2002-12-27 | USB DEVICE AND METHOD FOR CONTROLLING A USB DEVICE |
PCT/JP2002/013820 WO2004061636A1 (ja) | 2002-12-27 | 2002-12-27 | Usb装置およびusb装置の制御方法 |
EP08154518A EP1986103A3 (en) | 2002-12-27 | 2002-12-27 | USB device and method for controlling USB device |
AU2002359942A AU2002359942A1 (en) | 2002-12-27 | 2002-12-27 | Usb device and method for controlling usb device |
CNB028295234A CN100561407C (zh) | 2002-12-27 | 2002-12-27 | Usb装置和usb装置的控制方法 |
JP2004544170A JPWO2004061636A1 (ja) | 2002-12-27 | 2002-12-27 | Usb装置およびusb装置の制御方法 |
US11/065,563 US8069287B2 (en) | 2002-12-27 | 2005-02-25 | Universal serial bus device and method for controlling universal serial bus device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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PCT/JP2002/013820 WO2004061636A1 (ja) | 2002-12-27 | 2002-12-27 | Usb装置およびusb装置の制御方法 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/065,563 Continuation US8069287B2 (en) | 2002-12-27 | 2005-02-25 | Universal serial bus device and method for controlling universal serial bus device |
Publications (1)
Publication Number | Publication Date |
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WO2004061636A1 true WO2004061636A1 (ja) | 2004-07-22 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2002/013820 WO2004061636A1 (ja) | 2002-12-27 | 2002-12-27 | Usb装置およびusb装置の制御方法 |
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Country | Link |
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US (1) | US8069287B2 (ja) |
EP (2) | EP1986103A3 (ja) |
JP (1) | JPWO2004061636A1 (ja) |
CN (1) | CN100561407C (ja) |
AU (1) | AU2002359942A1 (ja) |
WO (1) | WO2004061636A1 (ja) |
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US7281069B2 (en) * | 2004-08-31 | 2007-10-09 | Broadcom Corporation | Method and system for extending the functionality of an embedded USB transceiver interface to handle threshold shift of a USB 2.0 bus during high-speed chirp |
JP2008059409A (ja) * | 2006-09-01 | 2008-03-13 | Nidec Sankyo Corp | Usb通信システム,usbデバイス,及びusb通信システムの異常検出方法 |
JP2008152533A (ja) * | 2006-12-18 | 2008-07-03 | Hitachi Omron Terminal Solutions Corp | Usb機器及びusb接続システム及びusb機器の取り外し認識擬制方法及びusb機器の再認識方法 |
JP2012123801A (ja) * | 2010-12-07 | 2012-06-28 | Realtek Semiconductor Corp | ユニバーサルシリアルバス(usb)システムのオンライン較正方法及びその装置 |
Families Citing this family (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100822798B1 (ko) * | 2006-01-16 | 2008-04-17 | 삼성전자주식회사 | 유에스비 장치 및 유에스 장치를 포함하는 데이터 처리시스템 |
TWI334545B (en) * | 2007-02-12 | 2010-12-11 | Via Tech Inc | A usb device and a mode detecting method thereof |
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US8020049B2 (en) * | 2008-12-18 | 2011-09-13 | Avago Technologies Ecbu Ip (Singapore) Pte. Ltd. | Detection of and recovery from an electrical fast transient/burst (EFT/B) on a universal serial bus (USB) device |
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CN112100104B (zh) * | 2020-08-05 | 2022-07-19 | 深圳市广和通无线股份有限公司 | 通用串行总线装置、系统及通讯设备 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH10301899A (ja) * | 1997-04-23 | 1998-11-13 | Casio Comput Co Ltd | 電子機器及びインタフェース回路 |
JPH10301898A (ja) * | 1997-04-23 | 1998-11-13 | Casio Comput Co Ltd | 電子機器及びインタフェース回路 |
JPH11224144A (ja) * | 1998-02-06 | 1999-08-17 | Nec Corp | 信号変化加速バス駆動回路 |
JP2002312085A (ja) * | 2001-02-07 | 2002-10-25 | Nagano Fujitsu Component Kk | インターフェイス自動判別周辺機器 |
JP2002344542A (ja) * | 2001-05-14 | 2002-11-29 | Seiko Epson Corp | 送信回路、データ転送制御装置及び電子機器 |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6210930A (ja) * | 1985-07-06 | 1987-01-19 | Nec Corp | スケルチ検出回路 |
JPH0974427A (ja) * | 1995-09-04 | 1997-03-18 | Tokai Rika Co Ltd | 通信装置 |
JP4400937B2 (ja) * | 1997-09-29 | 2010-01-20 | 株式会社ルネサステクノロジ | Usbデバイス |
JPH11194993A (ja) * | 1998-01-06 | 1999-07-21 | Alps Electric Co Ltd | Usbコントローラ |
US6363085B1 (en) * | 1998-03-23 | 2002-03-26 | Multivideo Labs, Inc. | Universal serial bus repeater |
JPH11305880A (ja) * | 1998-04-23 | 1999-11-05 | Sony Corp | Usb機器およびusbハブ装置 |
US6457086B1 (en) * | 1999-11-16 | 2002-09-24 | Apple Computers, Inc. | Method and apparatus for accelerating detection of serial bus device speed signals |
US6744810B1 (en) * | 1999-12-10 | 2004-06-01 | Intel Corporation | Signal repeater for voltage intolerant components used in a serial data line |
JP2003518892A (ja) * | 1999-12-24 | 2003-06-10 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | 装置の切断のエミュレーション |
US6559686B1 (en) * | 2000-05-12 | 2003-05-06 | Cypress Semiconductor Corp. | Analog envelope detector |
KR100375234B1 (ko) * | 2001-03-30 | 2003-03-08 | 삼성전자주식회사 | 스퀄치 감지 회로 |
TW512232B (en) * | 2001-05-08 | 2002-12-01 | Prolific Technology Inc | USB connection-detection circuitry and operation methods of the same |
JP3651411B2 (ja) * | 2001-05-14 | 2005-05-25 | セイコーエプソン株式会社 | 信号受信回路、データ転送制御装置及び電子機器 |
KR100421050B1 (ko) * | 2001-10-12 | 2004-03-04 | 삼성전자주식회사 | 범용직렬버스 호스트가 즉각적으로 리셋동작을 수행토록범용직렬버스의 신호 상태를 구현하는 로직 회로를구비하는 범용직렬버스 장치 |
CN100463340C (zh) * | 2005-08-19 | 2009-02-18 | 鸿富锦精密工业(深圳)有限公司 | 通用串行总线接口功率控制电路 |
-
2002
- 2002-12-27 CN CNB028295234A patent/CN100561407C/zh not_active Expired - Fee Related
- 2002-12-27 EP EP08154518A patent/EP1986103A3/en not_active Withdrawn
- 2002-12-27 AU AU2002359942A patent/AU2002359942A1/en not_active Abandoned
- 2002-12-27 WO PCT/JP2002/013820 patent/WO2004061636A1/ja not_active Application Discontinuation
- 2002-12-27 JP JP2004544170A patent/JPWO2004061636A1/ja active Pending
- 2002-12-27 EP EP02793451A patent/EP1580648A4/en not_active Ceased
-
2005
- 2005-02-25 US US11/065,563 patent/US8069287B2/en not_active Expired - Fee Related
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH10301899A (ja) * | 1997-04-23 | 1998-11-13 | Casio Comput Co Ltd | 電子機器及びインタフェース回路 |
JPH10301898A (ja) * | 1997-04-23 | 1998-11-13 | Casio Comput Co Ltd | 電子機器及びインタフェース回路 |
JPH11224144A (ja) * | 1998-02-06 | 1999-08-17 | Nec Corp | 信号変化加速バス駆動回路 |
JP2002312085A (ja) * | 2001-02-07 | 2002-10-25 | Nagano Fujitsu Component Kk | インターフェイス自動判別周辺機器 |
JP2002344542A (ja) * | 2001-05-14 | 2002-11-29 | Seiko Epson Corp | 送信回路、データ転送制御装置及び電子機器 |
Non-Patent Citations (1)
Title |
---|
See also references of EP1580648A4 * |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1550886A1 (en) * | 2003-12-31 | 2005-07-06 | General Electric Company | Modulated micro-lens diffusion film |
US7281069B2 (en) * | 2004-08-31 | 2007-10-09 | Broadcom Corporation | Method and system for extending the functionality of an embedded USB transceiver interface to handle threshold shift of a USB 2.0 bus during high-speed chirp |
US7552258B2 (en) | 2004-08-31 | 2009-06-23 | Broadcom Corporation | Method and system for extending the functionality of an embedded USB transceiver interface to handle threshold shift of a USB 2.0 bus during high-speed chirp |
JP2008059409A (ja) * | 2006-09-01 | 2008-03-13 | Nidec Sankyo Corp | Usb通信システム,usbデバイス,及びusb通信システムの異常検出方法 |
JP2008152533A (ja) * | 2006-12-18 | 2008-07-03 | Hitachi Omron Terminal Solutions Corp | Usb機器及びusb接続システム及びusb機器の取り外し認識擬制方法及びusb機器の再認識方法 |
JP2012123801A (ja) * | 2010-12-07 | 2012-06-28 | Realtek Semiconductor Corp | ユニバーサルシリアルバス(usb)システムのオンライン較正方法及びその装置 |
CN102541798A (zh) * | 2010-12-07 | 2012-07-04 | 瑞昱半导体股份有限公司 | 通用串行总线系统的在线校正方法及其装置 |
US8812757B2 (en) | 2010-12-07 | 2014-08-19 | Realtek Semiconductor Corp. | Online calibration method and device for universal serial bus system |
Also Published As
Publication number | Publication date |
---|---|
EP1986103A3 (en) | 2008-12-03 |
AU2002359942A1 (en) | 2004-07-29 |
US8069287B2 (en) | 2011-11-29 |
EP1580648A4 (en) | 2007-04-18 |
US20050144345A1 (en) | 2005-06-30 |
CN100561407C (zh) | 2009-11-18 |
EP1580648A1 (en) | 2005-09-28 |
EP1986103A2 (en) | 2008-10-29 |
CN1650249A (zh) | 2005-08-03 |
JPWO2004061636A1 (ja) | 2006-05-18 |
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