CN206209582U - A kind of computer and the level shifting circuit for computer motherboard - Google Patents
A kind of computer and the level shifting circuit for computer motherboard Download PDFInfo
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- CN206209582U CN206209582U CN201621054214.8U CN201621054214U CN206209582U CN 206209582 U CN206209582 U CN 206209582U CN 201621054214 U CN201621054214 U CN 201621054214U CN 206209582 U CN206209582 U CN 206209582U
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- computer
- embedded controller
- electrical level
- transferring chip
- processor
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Abstract
The utility model belongs to field of computer technology, there is provided a kind of computer and the level shifting circuit for computer motherboard, computer motherboard includes processor and embedded controller, the level shifting circuit includes electrical level transferring chip, the control source of electrical level transferring chip terminates the voltage output end of processor, the voltage output of electrical level transferring chip terminates the voltage input end of embedded controller, the control end of the connection termination processor of electrical level transferring chip, the receiving terminal of the transmission termination embedded controller of electrical level transferring chip；When computer starting, electrical level transferring chip carries out voltage conversion to the interface voltage that processor is exported according to the interface voltage of embedded controller, and exports to the embedded controller.The effect that embedded controller receives normal operation after corresponding interface voltage is realized from there through electrical level transferring chip, solves the problems, such as that there is embedded controller in the prior art is directly connected to lead to not normal operation with central processing unit.
Description
Technical field
The utility model belongs to field of computer technology, more particularly to a kind of computer and for computer motherboard
Level shifting circuit.
Background technology
EC (Embed Controller, embedded controller) is the required part of notebook exploitation, supports LPC
(Linear Predictive Coding, linear predictive coding) agreement, the LPC interface voltages of EC are 3.3V；But, domestic meter
CPU (Central Processing Unit, central processing unit) corresponding LPC interface voltages in calculation machine are 1.8V.Therefore,
EC and CPU is directly connected to normally to run.
Therefore, embedded controller is there is in the prior art to be directly connected to lead to not normal operation with central processing unit
Problem.
Utility model content
The utility model purpose is to provide a kind of computer and the level shifting circuit for computer motherboard, it is intended to
Solve the problems, such as that there is embedded controller in the prior art is directly connected to lead to not normal operation with central processing unit.
The utility model provides a kind of level shifting circuit for computer motherboard, and the computer motherboard includes place
Reason device and embedded controller, the level shifting circuit include electrical level transferring chip；
The control source of the electrical level transferring chip terminates the voltage output end of the processor, the electrical level transferring chip
Voltage output terminate the voltage input end of the embedded controller, the connection of the electrical level transferring chip terminates the treatment
The control end of device, the receiving terminal of the transmission termination embedded controller of the electrical level transferring chip；
When computer starting, the electrical level transferring chip is according to the interface voltage of the embedded controller to the place
The interface voltage of reason device output carries out voltage conversion, and exports to the embedded controller.
The utility model additionally provides a kind of computer, including computer motherboard, and the computer also includes institute as described above
The level shifting circuit stated.
The utility model provides a kind of computer and the level shifting circuit for computer motherboard, computer motherboard
Including processor and embedded controller, the level shifting circuit includes electrical level transferring chip, and the voltage of electrical level transferring chip is defeated
Enter to terminate the voltage output end of processor, the voltage output of electrical level transferring chip terminates the voltage input end of embedded controller,
The control end of the connection termination processor of electrical level transferring chip, the reception of the transmission termination embedded controller of electrical level transferring chip
End；When computer starting, the interface electricity that electrical level transferring chip is exported according to the interface voltage of embedded controller to processor
Pressure carries out voltage conversion, and exports to the embedded controller.Embedded Control is realized from there through electrical level transferring chip
Device receives the effect of normal operation after corresponding interface voltage, solves and exist in the prior art embedded controller with
Central processor is directly connected to lead to not the problem of normal operation.
Brief description of the drawings
A kind of modular structure of level shifting circuit for computer motherboard that Fig. 1 is provided for the utility model embodiment
Schematic diagram.
A kind of circuit connection of level shifting circuit for computer motherboard that Fig. 2 is provided for the utility model embodiment
Structural representation.
Specific embodiment
In order that the technical problems to be solved in the utility model, technical scheme and beneficial effect become more apparent, below
With reference to drawings and Examples, the utility model is further elaborated.It should be appreciated that specific implementation described herein
Example is only used to explain the utility model, is not used to limit the utility model.
Fig. 1 shows a kind of module of level shifting circuit for computer motherboard that the utility model embodiment is provided
Structure, for convenience of description, illustrate only the part related to the utility model embodiment, and details are as follows：
A kind of computer, including computer motherboard and level shifting circuit, computer motherboard include processor 101 and insertion
Formula controller 103, level shifting circuit includes electrical level transferring chip 102 (Fig. 1 is represented using U2), electrical level transferring chip 102
Voltage input end IN connects the voltage output end of processor 101, and the voltage output end OUT of electrical level transferring chip 102 connects embedded control
The voltage input end of device processed 103, the connection end HTP of electrical level transferring chip 102 connects the control end of processor 101, level conversion core
The transmitting terminal SEND of piece 102 connects the receiving terminal of embedded controller 103.
When computer starting, electrical level transferring chip 102 is according to the interface voltage of embedded controller 103 to processor
The interface voltage of 101 outputs carries out voltage conversion, and exports to the embedded controller 103.
In the present embodiment, electrical level transferring chip 102 employs the electrical level transferring chip of model SN74AVC4T245, when
So, the model of electrical level transferring chip is not construed as limiting, as long as can reach making with the function described in the present embodiment electrical level transferring chip 102
With also may be used.
As the interface voltage that the embodiment of the utility model one, the processor 101 that electrical level transferring chip 102 is received send
It is 1.8V, the interface voltage that electrical level transferring chip 102 is sent to embedded controller 103 is 3.3V.
Fig. 2 shows a kind of circuit of level shifting circuit for computer motherboard that the utility model embodiment is provided
Attachment structure, for convenience of description, illustrate only the part related to the utility model embodiment, and details are as follows：
The processor 101 includes control chip U1, and the level output end CHAN of control chip U1 is the level of processor 101
Output end, the control end CTRL of control chip U1 is the control end of processor 101.In the present embodiment, control chip U1 is used
The cpu chip of model FT1500A, certainly, the model of control chip is not construed as limiting, as long as can reach and the present embodiment control core
Function described in piece U1 also may be used.
The embedded controller 103 includes process chip U3, and the level input INPUT of process chip U3 is embedded control
The level input of device processed 103, the receiving terminal REC of process chip U3 is the receiving terminal of embedded controller 103.In the present embodiment
In, process chip U3 employs the process chip of model PowerPC750FX, and certainly, the model of process chip is not construed as limiting, only
Can reach and also may be used with the function described in the present embodiment process chip U3.
Used as the embodiment of the utility model one, the computer also includes dc source VCC, the reference electricity of dc source VCC
It is 5V to press.
The operation principle of a kind of level shifting circuit for computer motherboard that the utility model embodiment is provided is：
First, dc source VCC is opened, the level shifting circuit is powered, then during computer is started,
The voltage output end CHAN of control chip U1 exports the voltage of 1.8V, and electrical level transferring chip U2 is received by voltage input end IN
After the voltage of the 1.8V, the voltage of 3.3V is converted to, and is exported by voltage output end OUT, process chip is then by electricity
Pressure input INPUT receives the voltage of the 3.3V, the driven operation of embedded controller.
In sum, the utility model embodiment provides a kind of computer and the level conversion for computer motherboard
Circuit, computer motherboard includes processor and embedded controller, and the level shifting circuit includes electrical level transferring chip, and level turns
The control source for changing chip terminates the voltage output end of processor, the voltage output termination embedded controller of electrical level transferring chip
Voltage input end, electrical level transferring chip connection termination processor control end, electrical level transferring chip transmission termination insertion
The receiving terminal of formula controller；When computer starting, electrical level transferring chip is according to the interface voltage of embedded controller to treatment
The interface voltage of device output carries out voltage conversion, and exports to the embedded controller.From there through electrical level transferring chip reality
Showed the effect that embedded controller receives normal operation after corresponding interface voltage, solve exist in the prior art it is embedding
Enter the problem that formula controller is directly connected to lead to not normal operation with central processing unit.The utility model embodiment realizes letter
It is single, it is not necessary to increase extra hardware, can effective reduces cost, with stronger usability and practicality.
Preferred embodiment of the present utility model is the foregoing is only, is not used to limit the utility model, it is all at this
Any modification, equivalent and improvement made within the spirit and principle of utility model etc., should be included in the utility model
Protection domain within.
Claims (5)
1. a kind of level shifting circuit for computer motherboard, the computer motherboard includes processor and embedded Control
Device, it is characterised in that the level shifting circuit includes electrical level transferring chip；
The control source of the electrical level transferring chip terminates the voltage output end of the processor, the electricity of the electrical level transferring chip
The voltage input end of the pressure output termination embedded controller, the connection termination processor of the electrical level transferring chip
Control end, the receiving terminal of the transmission termination embedded controller of the electrical level transferring chip；
When computer starting, the electrical level transferring chip is according to the interface voltage of the embedded controller to the processor
The interface voltage of output carries out voltage conversion, and exports to the embedded controller.
2. level shifting circuit as claimed in claim 1, it is characterised in that the model of the electrical level transferring chip
SN74AVC4T245。
3. a kind of computer, including computer motherboard, it is characterised in that the computer also includes as claimed in claim 1 or 2
Level shifting circuit.
4. computer as claimed in claim 3, it is characterised in that the processor includes control chip, the control chip
Level output end be the processor level output end, the control end of the control chip is the control of the processor
End.
5. computer as claimed in claim 3, it is characterised in that the embedded controller includes process chip, the place
The level input for managing chip is the level input of the embedded controller, and the receiving terminal of the process chip is described embedding
Enter the receiving terminal of formula controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621054214.8U CN206209582U (en) | 2016-09-13 | 2016-09-13 | A kind of computer and the level shifting circuit for computer motherboard |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621054214.8U CN206209582U (en) | 2016-09-13 | 2016-09-13 | A kind of computer and the level shifting circuit for computer motherboard |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206209582U true CN206209582U (en) | 2017-05-31 |
Family
ID=58760473
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621054214.8U Active CN206209582U (en) | 2016-09-13 | 2016-09-13 | A kind of computer and the level shifting circuit for computer motherboard |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206209582U (en) |
-
2016
- 2016-09-13 CN CN201621054214.8U patent/CN206209582U/en active Active
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