CN208873140U - Multiplex roles USB circuit based on MTK chip for cell phone - Google Patents
Multiplex roles USB circuit based on MTK chip for cell phone Download PDFInfo
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- CN208873140U CN208873140U CN201821812153.6U CN201821812153U CN208873140U CN 208873140 U CN208873140 U CN 208873140U CN 201821812153 U CN201821812153 U CN 201821812153U CN 208873140 U CN208873140 U CN 208873140U
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Abstract
The utility model discloses a kind of multiplex roles USB circuits based on MTK chip for cell phone, including MTK CPU, the MTK CPU includes USB interface and several GPIO interfaces, including GL850G chip, first analog switch, several usb expansion interfaces and triode, the USB interface and GPIO interface are electrically connected with the first analog switch input terminal, first analoging switch output end is electrically connected with GL850G chip input terminal, the GL850G chip output is electrically connected with usb expansion interface, the transistor base is electrically connected with GPIO interface, the transistor collector is electrically connected with USB interface, the transistor emitter ground connection.Multiplex roles USB circuit provided by the utility model based on MTK chip for cell phone has multiple USB interfaces, is suitable for various smart machines.
Description
Technical field
The utility model relates to technical field of dinnerware, specifically, being related to a kind of multiplex roles based on MTK chip for cell phone
USB circuit.
Background technique
For many intellectual products, they need to connect the USB interface devices such as mouse, keyboard and USB flash disk to carry out
The communication products such as operation, such as communication plate, visual entrance guard, communication advertisement machine, however the cpu chip of MTK platform only has at present
One USB interface, is unable to satisfy the demand of these smart machines, so needing to solve this problem.
Utility model content
The purpose of this utility model is to provide a kind of multiplex roles USB circuits based on MTK chip for cell phone, have multiple
USB interface is suitable for various smart machines.
Technical solution used by multiplex roles USB circuit disclosed by the utility model based on MTK chip for cell phone is:
A kind of multiplex roles USB circuit based on MTK chip for cell phone, including MTK CPU, the MTK CPU includes USB interface
It further include GL850G chip, the first analog switch, several usb expansion interfaces and triode, the USB with several GPIO interfaces
Interface and GPIO interface are electrically connected with the first analog switch input terminal, and first analoging switch output end and GL850G chip are defeated
Enter end electrical connection, the GL850G chip output is electrically connected with usb expansion interface, the transistor base and GPIO interface electricity
Connection, the transistor collector are electrically connected with USB interface, the transistor emitter ground connection.
It preferably, further include the second analog switch, first analoging switch output end and GPIO interface and institute
The electrical connection of the second analog switch input terminal is stated, second analoging switch output end is electrically connected with usb expansion interface.
Preferably, the USB interface includes the port USB_ID, the port USB_ID and transistor collector electricity
Connection, USB host (main equipment) mode and USB device (from equipment) mode of the USB_ID port controlling MTK CPU
Two kinds of operating modes.
Preferably, the usb expansion interface no less than has 2.
Preferably, the usb expansion interface meets USB2.0 consensus standard.
The beneficial effect of multiplex roles USB circuit disclosed by the utility model based on MTK chip for cell phone is: MTK CPU core
The signal of only one USB interface of piece, USB interface is switched a signal on GL850G chip by the first analog switch, and
GL850G chip is extended to multiple USB interface signals and reaches usb expansion interface.So, so that it may have multiple
USB interface is suitable for various smart machines.
Detailed description of the invention
Fig. 1 is the circuit diagram of multiplex roles USB circuit of the utility model based on MTK chip for cell phone.
Fig. 2 is the USB host operating mode signal stream of multiplex roles USB circuit of the utility model based on MTK chip for cell phone
Cheng Tu.
Fig. 3 is the USB device operating mode signal of multiplex roles USB circuit of the utility model based on MTK chip for cell phone
Flow chart.
Specific embodiment
The utility model is further elaborated and is illustrated with Figure of description combined with specific embodiments below:
Please refer to Fig. 1, Fig. 2 and Fig. 3, a kind of multiplex roles USB circuit based on MTK chip for cell phone, including power supply
BATIERY, power supply chip U5 and U6, MTK CPU U1, crystal oscillator X1, the first analog switch U2, second analog switch U3, GL850G
Chip U4, usb expansion interface USB1, USB2, USB3 and USB4, NPN triode Q8, resistance R1, R5 and inductance L1.MTK CPU
U1 includes USB interface and several GPIO interfaces, and USB interface and GPIO interface are electrically connected with the first analog switch U2 input terminal, the
One analog switch U2 output end is electrically connected with GL850G chip U4 input terminal, GL850G chip U4 output end and usb expansion interface
USB2, USB3 and USB4 electrical connection, triode Q8 base stage are electrically connected with GPIO interface, triode Q8 collector and USB interface electricity
Connection, triode Q8 emitter ground connection.First analog switch U2 output end and GPIO interface and the second analog switch U3 input terminal
Electrical connection, the second analog switch U3 output end are electrically connected with usb expansion interface USB1.
In the present embodiment, the USB interface of MTK CPU U1 includes USB_ID, USB_DM and USB_DP, MTK CPU U1's
GPIO interface includes GPIO1, GPIO2, GPIO3, GPIO4 and GPIO5, further includes a VIO18_PMU interface.Chip U4 has 28
A port, chip U2 and U3 respectively have 10 ports, and chip U5 has 5 ports, and chip U6 has 8 ports.
Wherein USB_DP and USB_DM is connected with the usb data port 1 and 2 of chip U2,4 He of multiplexing source port of chip U2
5 are connected with the multiplexing source port 4 and 5 of chip U3, chip U2 multiplexing source port 6 and 7 and chip U4 usb signal port 25 and
26 are connected, and the usb expansion output port 27 and 28 of chip U4 is connected with the port D- and D+ of USB2, and the usb expansion of chip U4 is defeated
Exit port 2 and 3 is connected with the port D- and D+ of USB3, the usb expansion output port 11 and 12 of chip U4 and the D- and D+ of USB4
Port is connected, and the usb expansion output port 8 and 9 of chip U4 is connected with the multiplexing source port 6 and 7 of chip U3, the USB of chip U3
Data port 1 and 2 is connected with the port D- and D+ of USB1.Wherein, chip U2 and U3 model SGM7227, this partial circuit,
The transmission path of usb data signal is embodied, the first analog switch is reached by MTK CPU first, then the first analog switch is again
The second analog switch or GL850G chip are reached, the second analog switch is such as reached, the second analog switch is then directly transferred to USB expansion
Interface is opened up, GL850G chip is such as reached, GL850G chip then reaches the second analog switch, and the second analog switch reaches USB expansion again
Interface is opened up, two kinds of different paths embody two kinds of the USB host (main equipment) and USB device (from equipment) of MTK CPU not
The signal flow of same operating mode.
Wherein power supply BATIERY voltage 3.7V powers for chip U2, U3, U5 and U6.9 ports of chip U2, U3 are as confession
Electric end is connected with power supply BATIERY.4 ports of chip U5 are connected as feeder ear power supply BATIERY, the enable end 3 of chip U5
It is connected with GPIO1, the port 5 and 2 of chip U5 is grounded, and the port 1 of chip U5 is as out-put supply and 1,5,10, the 16 of chip U4
It is connected with 24 ports, output voltage 3.3V.4 and 5 ports of chip U6 are connected as feeder ear with power supply BATIERY, port 4
With power supply BATIERY it is straight between be in series with boost inductance L1, the enable end 1 of chip U6 is connected with GPIO3, the port 2,3 of chip U6
With 5 ground connection, the port 7 and 8 of chip U6 as out-put supply and USB1, USB2, USB3, USB4 the end VBUS and chip U4 23
Port is connected, output voltage 5V.Wherein chip U5 model SGM2036-3.3YUDH4G/TR, chip U6 model
SGM2036-UTDFN-1X1-4L, this part are the power supply circuit of entire circuit, guarantee that entire circuit can work normally.
Wherein GPIO5 connects triode Q8 base stage, and USB_ID and resistance R5 mono- terminate triode Q8 collector, and resistance R5 is another
VIO18_PMU is terminated, VIO18_PMU is triode Q8 power supply, triode Q8 emitter ground connection, the reset of GPIO4 and chip U4
Port 13 is connected, and GPIO2 is connected with the selection input terminal 10 of chip U2 and U3.When GPIO5 is high level, triode is in full
And state, so USB_ID is low level, and GPIO1, GPIO2, GPIO3 are high level, and at this moment MTK CPU is USB host
(main equipment) operating mode, when GPIO5 is low level (being defaulted as low level), triode is in off state, so USB_
ID is high level, and GPIO1, GPIO2, GPIO3 are low level, and at this moment MTK CPU is USB device (from equipment) Working mould
Formula, wherein bringing the different operating modes of corresponding MTK CPU by the outputting cutting of GPIO2 control chip U2 and U3.This part
For control section, the operating mode and corresponding usb expansion interface of MTK CPU are controlled by MTK CPU.
The port 1 of last crystal oscillator X1 is connected with the crystal oscillator interface 6 of chip U4, and the port 2 of crystal oscillator X1 is grounded, the end of crystal oscillator X1
Mouth 3 is connected with 4.4 one end connecting resistance R1 of port of chip U4, resistance R1 other end ground connection.This part is its of entire circuit
His part, so that entire circuit can work normally.
Above scheme is based on MTK chip for cell phone, the expansion of single USB interface is realized using USB HUB chip GL850G
It opens up, and realizes the different working modes of MTK CPU using analog switch.Such circuit has multiple USB interfaces, is suitable for
Various smart machines.
Finally it should be noted that above embodiments are only to illustrate the technical solution of the utility model, rather than to this reality
With the limitation of novel protected range, although being explained in detail referring to preferred embodiment to the utility model, this field it is general
Lead to it will be appreciated by the skilled person that can be with the technical solution of the present invention is modified or equivalently replaced, without departing from this
The spirit and scope of utility model technical solution.
Claims (5)
1. a kind of multiplex roles USB circuit based on MTK chip for cell phone, including MTK CPU, the MTK CPU include USB interface and
Several GPIO interfaces, which is characterized in that including GL850G chip, the first analog switch, several usb expansion interfaces and triode,
The USB interface and GPIO interface are electrically connected with the first analog switch input terminal, first analoging switch output end with
The electrical connection of GL850G chip input terminal, the GL850G chip output are electrically connected with usb expansion interface, the transistor base
It is electrically connected with GPIO interface, the transistor collector is electrically connected with USB interface, the transistor emitter ground connection.
2. as described in claim 1 based on the multiplex roles USB circuit of MTK chip for cell phone, which is characterized in that further include the second mould
Quasi- switch, first analoging switch output end and GPIO interface are electrically connected with the second analog switch input terminal, and described the
Two analoging switch output ends are electrically connected with usb expansion interface.
3. as claimed in claim 2 based on the multiplex roles USB circuit of MTK chip for cell phone, which is characterized in that the USB interface
Including the port USB_ID, the port USB_ID is electrically connected with transistor collector, the USB_ID port controlling MTK CPU's
Two kinds of operating modes of USB host mode and USB device mode.
4. as described in claim 1 based on the multiplex roles USB circuit of MTK chip for cell phone, which is characterized in that the usb expansion
Interface no less than has 2.
5. the multiplex roles USB circuit based on MTK chip for cell phone as described in claim 1-4 any one, which is characterized in that institute
It states usb expansion interface and meets USB2.0 consensus standard.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821812153.6U CN208873140U (en) | 2018-11-05 | 2018-11-05 | Multiplex roles USB circuit based on MTK chip for cell phone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821812153.6U CN208873140U (en) | 2018-11-05 | 2018-11-05 | Multiplex roles USB circuit based on MTK chip for cell phone |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208873140U true CN208873140U (en) | 2019-05-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821812153.6U Active CN208873140U (en) | 2018-11-05 | 2018-11-05 | Multiplex roles USB circuit based on MTK chip for cell phone |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11914491B2 (en) | 2021-12-08 | 2024-02-27 | Via Labs, Inc. | USB integrated circuit, testing platform and operating method for USB integrated circuit |
| TWI839804B (en) * | 2021-12-08 | 2024-04-21 | 威鋒電子股份有限公司 | Usb integrated circuit, testing platform and operating method for usb integrated circuit |
-
2018
- 2018-11-05 CN CN201821812153.6U patent/CN208873140U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11914491B2 (en) | 2021-12-08 | 2024-02-27 | Via Labs, Inc. | USB integrated circuit, testing platform and operating method for USB integrated circuit |
| TWI839804B (en) * | 2021-12-08 | 2024-04-21 | 威鋒電子股份有限公司 | Usb integrated circuit, testing platform and operating method for usb integrated circuit |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20190807 Address after: 518000 Kexing Science Park B2-1703, 05, No. 15 Keyuan Road, Yuehai Street Science Park, Nanshan District, Shenzhen City, Guangdong Province Patentee after: Shenzhen Hao Cheng Communication Technology Co., Ltd. Address before: 317500 No. 312, Dongmen North Road, Taiping Street, Wenling City, Taizhou City, Zhejiang Province Patentee before: Lin Danjun |
|
| TR01 | Transfer of patent right |