CN203838530U - Apparatus for sharing addresses of multiple identical I2C devices - Google Patents
Apparatus for sharing addresses of multiple identical I2C devices Download PDFInfo
- Publication number
- CN203838530U CN203838530U CN201320800657.7U CN201320800657U CN203838530U CN 203838530 U CN203838530 U CN 203838530U CN 201320800657 U CN201320800657 U CN 201320800657U CN 203838530 U CN203838530 U CN 203838530U
- Authority
- CN
- China
- Prior art keywords
- unibus
- bus
- address
- pin
- devices
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000000872 buffer Substances 0.000 claims abstract description 28
- 230000001360 synchronised effect Effects 0.000 claims description 4
- 238000004891 communication Methods 0.000 abstract description 7
- 238000010586 diagram Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000004377 microelectronic Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
Landscapes
- Small-Scale Networks (AREA)
Abstract
The utility model discloses an apparatus for sharing the addresses of multiple identical I2C devices, and the apparatus is characterized in that the apparatus comprises unibus three-state buffers, an MCU microcontroller, and an I2C bus. The MCU microcontroller with a plurality of I/O ports is electrically connected with the unibus three-state buffers at the same time. The unibus three-state buffers are electrically connected with the I2C bus. The apparatus provided by the utility model employs the unibus three-state buffers, and achieves the control along with the I/O ports of the external MCU microcontroller. A three-state electronic switch is added to an SCL clock line of the I2C bus, thereby effectively solving a problem of communication limiting of a unique device in an I2C protocol.
Description
Technical field:
The utility model belongs to electronic circuit design field, relates in particular to the shared device of multiple identical I2C address of devices.
Background technology:
I2C bus is the twin wire universal serial bus of being developed by PHILIPS company, for connecting microcontroller and peripherals thereof.It is a kind of bus standard that microelectronics Control on Communication field extensively adopts.It is a kind of special shape of synchronous communication, has interface line few, and control mode is simple, and device package form is little, and traffic rate is compared with advantages of higher.
I2C agreement specifies: each device is to identify by unique address of devices, comes from the 6th page the 0 4th. 0 3rd of Philips Semiconductors " THE I2C-BUS SPECIFICATION " VERSION 2.1 JANUARY 2000.
Owing to possessing, the part category of I2C interface is various, and PHILIPS also recognizes this problem, so the address of devices that has also configured two kinds of specifications in I2C agreement is for selecting, is respectively 7-BIT ADDRESSING/10-BIT ADDRESSING.But however; in the time of the electronic circuit of many I2C of actual design slave communication; also often can meet the same situation of I2C address of devices of some device, AUDIO CODEC tlv320aic3104 and the tlv320aic3105 of for example TI company, both I2C device addresses are the same.Existing I2C agreement not can solve this address of devices collision problem.
Summary of the invention:
Technical problem to be solved in the utility model is: provide a kind of multiple identical I2C address of devices shared device, unibus three-state buffer coordinates the I/O mouth pin of outside MCU microcontroller to control, for the SCL clock line of I2C bus has increased a tri-state break-make electronic switch, solve the communications constraints problem of the unique address of devices in I2C agreement.
In order to achieve the above object, the technical solution adopted in the utility model is:
The shared device of multiple identical I2C address of devices, it is characterized in that, comprise unibus three-state buffer, MCU microcontroller, I2C bus, the MCU microcontroller with several I/O mouths is electrically connected with several unibus three-state buffers simultaneously, unibus three-state buffer and the electrical connection of I2C bus.
Optimal technical scheme, I2C bus is universal serial bus, comprises data line SDA and clock line SCL.
Optimal technical scheme, unibus three-state buffer comprises the OE control pin that is set to enable to hold EN, and A pin and the Y pin of synchronous clock frequency is provided; The A pin of unibus three-state buffer and the clock line SCL of I2C bus electrical connection; The Y pin of unibus three-state buffer and address module electrical connection.
Optimal technical scheme, the data line SDA lead-in wire in I2C bus is directly connected to address module, and a tri-state break-make electronic switch of the upper increase of clock line SCL, carries out level control.
Owing to adopting technique scheme, advantage and good effect that the utility model has are: be convenient to multiple identical I2C address of devices and share, and to realize the time division multiplex processing to identical I2C address of devices module, convenient and practical.
Brief description of the drawings
Fig. 1 is unibus three-state buffer and peripheral circuit diagram thereof.
Fig. 2 is the unibus three-state buffer abstract graph of Fig. 1.
Fig. 3 is the syndeton schematic diagram of address module and unibus three-state buffer.
Embodiment
For being illustrated more clearly in content of the present utility model, be further described below in conjunction with the drawings and specific embodiments:
As shown in Figure 1: the shared device of multiple identical I2C address of devices comprises unibus three-state buffer, MCU microcontroller, I2C bus, the MCU microcontroller with several I/O mouths is electrically connected with several unibus three-state buffers simultaneously, unibus three-state buffer and the electrical connection of I2C bus.I2C bus is universal serial bus, comprises data line SDA and clock line SCL.
R10 is that OE controls the pull-up resistor on pin, the decoupling capacitance that C22 is U5, and R11 is the current-limiting resistance of Y pin output, VCC is supply voltage, GND ground wire; Unibus three-state buffer comprises the OE control pin that is set to enable to hold EN, and A pin and the Y pin of synchronous clock frequency is provided; The A pin of unibus three-state buffer and the clock line SCL of I2C bus electrical connection; The Y pin of unibus three-state buffer and address module electrical connection; Data line SDA lead-in wire in I2C bus is directly connected to address module.
Unibus three-state buffer is connected with MCU microcontroller, controls by the I/O mouth pin of MCU microcontroller, for the SCL clock line of I2C bus increases a tri-state break-make electronic switch, carries out level control.
In the time will carrying out I2C communication to device 1, first MCU_IO1 is set low to level, gating SCL, to SCL2, the SCL clock line of I2C bus can be input on I2C_DEVICE1 address module by bus buffer module.After configuration I2C_DEVICE1, MCU_IO1 is set high to level, block the path of SCL and SCL2, making SCL2 is high-impedance state.
Three I/O mouth controls of MCU microcontroller are processed upper, can not MCU_IO1, MCU_IO2, MCU_IO3 be set high simultaneously and carry out I2C communication simultaneously.Go up at one time and one of them I/O mouth can only be set low, to realize the time division multiplex processing to identical I2C address of devices module.
Claims (4)
1. many shared devices of identical I2C address of devices, it is characterized in that, comprise unibus three-state buffer, MCU microcontroller, I2C bus, the MCU microcontroller with several I/O mouths is electrically connected with several unibus three-state buffers simultaneously, unibus three-state buffer and the electrical connection of I2C bus.
2. the shared device of multiple identical I2C address of devices according to claim 1, is characterized in that, described I2C bus is universal serial bus, comprises data line SDA and clock line SCL.
3. the shared device of multiple identical I2C address of devices according to claim 1, is characterized in that, described unibus three-state buffer comprises the OE control pin that is set to enable to hold EN, and A pin and the Y pin of synchronous clock frequency is provided; The A pin of unibus three-state buffer and the clock line SCL of I2C bus electrical connection; The Y pin of unibus three-state buffer and address module electrical connection.
4. the shared device of multiple identical I2C address of devices according to claim 1, is characterized in that, the data line SDA lead-in wire in described I2C bus is directly connected to address module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320800657.7U CN203838530U (en) | 2013-12-06 | 2013-12-06 | Apparatus for sharing addresses of multiple identical I2C devices |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320800657.7U CN203838530U (en) | 2013-12-06 | 2013-12-06 | Apparatus for sharing addresses of multiple identical I2C devices |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203838530U true CN203838530U (en) | 2014-09-17 |
Family
ID=51516347
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320800657.7U Expired - Lifetime CN203838530U (en) | 2013-12-06 | 2013-12-06 | Apparatus for sharing addresses of multiple identical I2C devices |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203838530U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106844270A (en) * | 2017-03-02 | 2017-06-13 | 杭州领芯电子有限公司 | The circuit and method of a kind of automatic identification and configuration I2C interface circuit logic levels |
| CN113630186A (en) * | 2021-09-15 | 2021-11-09 | 青岛海信宽带多媒体技术有限公司 | Optical module and communication method |
-
2013
- 2013-12-06 CN CN201320800657.7U patent/CN203838530U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106844270A (en) * | 2017-03-02 | 2017-06-13 | 杭州领芯电子有限公司 | The circuit and method of a kind of automatic identification and configuration I2C interface circuit logic levels |
| CN106844270B (en) * | 2017-03-02 | 2019-07-26 | 杭州领芯电子有限公司 | A kind of circuit and method of automatic identification and configuration I2C interface circuit logic level |
| CN113630186A (en) * | 2021-09-15 | 2021-11-09 | 青岛海信宽带多媒体技术有限公司 | Optical module and communication method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103095855B (en) | I2C communication interface unit | |
| CN207473599U (en) | A kind of I2C bus control interfaces circuit | |
| CN201604665U (en) | Communication interface equipment of train control center | |
| CN108021522A (en) | USB device master slave mode switching circuit | |
| CN103530261A (en) | Circuit and management method for access to multiple slaves having same I2C address | |
| CN100480923C (en) | Controller soft realizing method from I2C bus | |
| CN203520391U (en) | Data transmission multiplexing device | |
| CN107544653A (en) | A kind of USB Type C interface and mobile device | |
| CN203838530U (en) | Apparatus for sharing addresses of multiple identical I2C devices | |
| CN112859682A (en) | Control chip, control device and electronic equipment | |
| CN102629241B (en) | Isolation circuit of inter-integrated circuit (I2C) bus and I2C bus system | |
| CN210222744U (en) | Master-slave equipment switching device and terminal equipment based on USB _ OTG mode | |
| CN102637453A (en) | Phase change memory including serial input/output interface | |
| CN202721661U (en) | UART level switching circuit | |
| CN107370651B (en) | Communication method between SPI slave machines | |
| CN205608716U (en) | Multiunit optical module communication interface switching circuit | |
| CN110175143A (en) | A kind of USB interface device and control method for supporting more HOST He list OTG | |
| CN203883862U (en) | PROFIBUS communication module for connecting frequency converter with host computer | |
| CN203733110U (en) | Internal integration circuit and control circuit thereof | |
| CN208580401U (en) | A kind of multiplexed port system based on SPI communication | |
| CN105068961B (en) | A kind of Ethernet interface manages circuit | |
| CN204129732U (en) | Based on the board self-adaptation equipment of satellite time transfer machine frame system | |
| CN202948445U (en) | Universal serial bus (USB) interface expansion circuit | |
| CN208092483U (en) | Brain communication system controller and robot for robot | |
| CN204719747U (en) | The compatible equipment of Serial Peripheral Interface (SPI), Serial Peripheral Interface (SPI) and main process equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: GUANGDONG GONSIN INTELLIGENT CONFERENCE CO., LTD. Free format text: FORMER NAME: GUANGDONG GONSIN DIGITAL EQUIPMENT CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 528300, No. 401-416, No. 41, building C, Shunde Road, Daliang Industrial Zone, Shunde District, Foshan, Guangdong, Fengxiang, China Patentee after: GONSIN CONFERENCE EQUIPMENT CO.,LTD. Address before: 528300, No. 401-416, No. 41, building C, Shunde Road, Daliang Industrial Zone, Shunde District, Foshan, Guangdong, Fengxiang, China Patentee before: Guangdong Gonsin Digital Equipment Co.,Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20140917 |
|
| CX01 | Expiry of patent term |