CN206490682U - CAN and 422/485 common interface circuit - Google Patents
CAN and 422/485 common interface circuit Download PDFInfo
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- CN206490682U CN206490682U CN201720013682.9U CN201720013682U CN206490682U CN 206490682 U CN206490682 U CN 206490682U CN 201720013682 U CN201720013682 U CN 201720013682U CN 206490682 U CN206490682 U CN 206490682U
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Abstract
The utility model is related to communication interface circuit, more particularly to a kind of CAN and 422/485 common interface circuit.The utility model provides a kind of interface circuit, and the change of circuit correspondence with foreign country agreement on the premise of control chip, external port position are fixed, can be realized only by replacing CAN isolating chip, 422/485 isolating chip.Special control chip and CAN isolating chip, the combination of 422/485 isolating chip due to having selected, allow manufacturer first to unify production and include control chip and the interface circuit to external port with fixed position, and then CAN isolating chip, 422/485 isolating chip are being directly welded on circuit board as needed, or, when needing to change circuit communication agreement, corresponding isolating chip is only changed without being redesigned again to integrated circuit, the production efficiency of product is greatly improved.
Description
Technical field
The utility model is related to communication interface circuit, more particularly to CAN and 422/485 common interface circuit.
Background technology
CAN and 422/485 communication protocol are communication protocol conventional at present, but two kinds of agreements possess completely not
With electric interfaces, therefore when specifically used, CAN interface and 422/485 communication interface generally can not be shared；And one
A little application scenarios, for identical product, one of two kinds of communication protocols can be respectively adopted in different clients, and this is resulted in design production
During corresponding product, otherwise producer reserves CAN interface and 422/485 interface on product simultaneously, or for different visitors
Design different product types in family（One kind only leaves CAN interface, and one kind only leaves 422/485 interface）, in practical application,
Although CAN interface is reserved on product simultaneously and the mode production efficiency of 422/485 interface is higher（A kind of type only need to be produced
Number）, but be due to that most products are all very sensitive to volume, size（If some normal components are, it is necessary to installed in reserved mark
In quasi- space, its size is fixed）, and device size increase can inevitably be caused by reserving two kinds of interfaces simultaneously, and therefore, reality
In more situations be that producer needs to produce different product types for different clients, and after product is sent, due to model
Mistake causes the accident for returning factory's replacement（422/485 interface product is gone to needing the client of CAN to send out）Also happen occasionally, to setting
Meter, manufacturer cause very big puzzlement.
Utility model content
The purpose of this utility model is to overcome CAN in the prior art and 422/485 EBI can not share, because
This need to produce two kinds of models to identical product, and the problem of two kinds of models contain one of which interface circuit respectively can there is provided one kind
To cause CAN and 422/485 general interface circuit.
In order to realize above-mentioned utility model purpose, the utility model provides following technical scheme：
A kind of CAN and 422/485 common interface circuit, including, control chip, the control chip at least one
Pin I is as CAN output pin CAN1_TX, and at least one pin II is as CAN input pin CAN1_RX, at least
One pin III is used as 422/485 input pin UART2_ as 422/485 output pin UART2_TX, at least one pin IV
RX；The pin I is connected with pin III, and the pin II is connected with pin IV.
Also include first inner port, second inner port, first inner port connects with pin I with pin III simultaneously
Connect；Second inner port is connected with pin II and pin IV simultaneously；The thing of first inner port, second inner port
Reason position is fixed；Meanwhile, first inner port is used for and CAN isolating chip or the connection of 422/485 isolating chip, with
Signal to be sent is sent to the CAN isolating chip or 422/485 isolating chip；Second inner port be used for and
CAN isolating chip or the connection of 422/485 isolating chip, to be connect from the CAN isolating chip or 422/485 isolating chip
The collection of letters number；
Also include simultaneously, first couple of external port A, second couple of external port B, the 3rd couple of external port Z, the 4th couple of external port Y；Institute
State first couple of external port A, second pair of external port B, the 3rd couple of external port Z and the 4th couple of external port Y physical location to fix, together
When, first couple of external port A, second couple of external port B, the 3rd couple of external port Z, the 4th couple of external port Y are respectively used to and 422/
The A pins of 485 isolating chips, B pins, Z pins, the connection of Y pins；Meanwhile, second couple of external port B, the 3rd couple of external port Z
H pins, the L pins being also used for respectively with CAN isolating chip are connected.
Further, the control chip uses chip STM32F303VBT6.
Further, pin I is control chip STM32F303VBT6 pin PB9, and pin II is control chip
STM32F303VBT6 pin PB8, pin III is control chip STM32F303VBT6 pin PD5, and pin IV is control core
Piece STM32F303VBT6 pin PD6.
It is preferred that, CAN isolating chip uses chip I SO1050, and 422/485 isolating chip uses chip I SO3086,
Because, the respective pin position of above-mentioned two chip and apart from identical（Specifically, ISO1050 H pins and ISO3086
B Pin locations, ISO1050 L pins are identical with ISO3086 Z Pin locations, meanwhile, the input and output of two chips are drawn
Placement of foot is also identical）, it is possible to achieve in first inner port, second inner port, first pair of external port A, second pair of external port
Two chips are directly placed on after position is fixed on circuit boards by the ports such as B, the 3rd couple of external port Z, the 4th couple of external port Y
Relevant position is welded, and if necessary to change communication type, such as changes CAN into 485 communication modes, only need to be by isolated core
Piece is changed, and other modules of circuit board will not be involved completely.
It should be noted that CAN isolating chip, 422/485 isolating chip that the utility model is used are combined and not limited
, can be with as long as CAN isolating chip, 422/485 isolating chip corresponding function pin positions are identical in above-mentioned two chip
Meet in first inner port, second inner port, first couple of external port A, second couple of external port B, the 3rd couple of external port Z, the
The ports such as four couples of external port Y are after position is fixed on circuit boards, the chip portfolio that can directly exchange, using this practicality newly
The common interface circuit that type is provided, it is convenient to change communication protocol and communication mode.
Compared with prior art, the beneficial effects of the utility model：The utility model provides a kind of circuit structure, can be in control
It is real only by CAN isolating chip, 422/485 isolating chip is changed on the premise of coremaking piece, external port position are fixed
The change of existing circuit correspondence with foreign country agreement.Special control chip and CAN isolating chip, 422/485 due to having selected
Isolating chip is combined so that manufacturer can first unify production comprising control chip and external port is connect with fixed position
Mouth circuit, and then CAN isolating chip, 422/485 isolating chip are being directly welded on circuit board as needed, or,
When needing to change circuit communication agreement, corresponding isolating chip is only changed without being redesigned again to integrated circuit,
The production efficiency of product is greatly improved, user is facilitated.
Brief description of the drawings：
Fig. 1 is the utility model theory diagram.
Fig. 2 is control chip circuit diagram in the utility model embodiment.
CAN isolating chip or 422/485 isolating chip circuit diagram in Fig. 3 the utility model embodiments.
Embodiment
Below in conjunction with the accompanying drawings and specific embodiment is described in further detail to the utility model.But this should not be understood
Following embodiment, all technologies realized based on the utility model content are only limitted to for the scope of the above-mentioned theme of the utility model
Belong to scope of the present utility model.
Embodiment 1：As shown in Figure 1 to Figure 3, the present embodiment provides a kind of CAN and 422/485 common interface circuit,
Including, control chip 1, in the present embodiment, the control chip 1 uses chip STM32F303VBT6, and the control chip 1 draws
Pin PB9 is used as 422/485 as CAN output pin CAN1_TX, PB8 as CAN input pin CAN1_RX, PD5
Output pin UART2_TX, PD6 are used as 422/485 input pin UART2_RX；PB9 is connected with PD5, and PB8 is connected with PD6.
Also include first inner port 21, second inner port 22, first inner port 21 simultaneously with pin PB9,
PD5 connections；Second inner port 22 is connected with PB8, PD6 simultaneously；First inner port 21, second inner port 22
Physical location fix；Meanwhile, first inner port 21 is used for and communication isolating chip 2 is connected, in the present embodiment, communication
Isolating chip 2 is combined from CAN isolating chip ISO1050 or 422/485 isolating chip ISO3086, specifically, first
Inner port 21 and CAN isolating chip ISO1050 TXD pins or 422/485 isolating chip ISO3086 TXD pins connect
Connect, signal to be sent is sent to the CAN isolating chip or 422/485 isolating chip；Second inner port 22
For the RXD pins connection with CAN isolating chip ISO1050 or 422/485 isolating chip ISO3086, with total from the CAN
Line isolating chip or 422/485 isolating chip receive signal.
Also include simultaneously, first couple of external port A, second couple of external port B, the 3rd couple of external port Z, the 4th couple of external port Y；Institute
State first couple of external port A, second pair of external port B, the 3rd couple of external port Z and the 4th couple of external port Y physical location to fix, together
When, first couple of external port A, second couple of external port B, the 3rd couple of external port Z, the 4th couple of external port Y are respectively used to and 422/
485 isolating chip ISO3086 A pins, B pins, Z pins, the connection of Y pins；Meanwhile, second couple of external port B, the 3rd couple
H pins, the L pins that external port Z is also used for respectively with CAN isolating chip ISO1050 are connected.
Due to chip I SO3086 and chip I SO1050 respective pin position and apart from identical（Specifically, ISO1050
The B Pin locations of H pins and ISO3086, ISO1050 L pins are identical with ISO3086 Z Pin locations, meanwhile, two cores
The TXD pins of piece and control chip, RXD Pin locations are also identical）, it is possible to achieve in first inner port 21, second the inner
Mouthfuls 22, the port such as first couple of external port A, second couple of external port B, the 3rd couple of external port Z, the 4th couple of external port Y is on circuit boards
After position is fixed, two chips are directly placed on relevant position welding, if necessary to change communication type, such as by CAN
Bus changes 485 communication modes into, need to only change isolating chip, the module of other in circuit board（Such as control chip, each end
Mouthful）It will not be involved completely.
It should be noted that CAN isolating chip, 422/485 isolating chip that the utility model is used are combined and not limited
, can be with as long as CAN isolating chip, 422/485 isolating chip corresponding function pin positions are identical in above-mentioned two chip
Meet in first inner port 21, second inner port 22, first pair of external port A, second pair of external port B, the 3rd pair of external port
When position is fixed on circuit boards for the ports such as Z, the 4th couple of external port Y, the communication isolating chip portfolio that can directly exchange,
The common interface circuit provided using the utility model, it is convenient to change communication protocol and communication mode.
Claims (4)
1. a kind of CAN and 422/485 common interface circuit, it is characterised in that including control chip, the control chip
At least one pin I as CAN output pin CAN1_TX, at least one pin II is used as CAN input pin
CAN1_RX, at least one pin III is as 422/485 output pin UART2_TX, and at least one pin IV is defeated as 422/485
Enter pin UART2_RX；The pin I is connected with pin III, and the pin II is connected with pin IV；
Also include first inner port, second inner port, first inner port is connected with pin I with pin III simultaneously；
Second inner port is connected with pin II and pin IV simultaneously；The physics of first inner port, second inner port
Position is fixed；Meanwhile, first inner port is used for and CAN isolating chip or the connection of 422/485 isolating chip, will
Signal to be sent is sent to the CAN isolating chip or 422/485 isolating chip；Second inner port is used for and CAN
Bus isolation chip or the connection of 422/485 isolating chip, to be received from the CAN isolating chip or 422/485 isolating chip
Signal；
Also include simultaneously, first couple of external port A, second couple of external port B, the 3rd couple of external port Z, the 4th couple of external port Y；Described
A pair of external port A, second pair of external port B, the 3rd couple of external port Z and the 4th couple of external port Y physical locations are fixed, meanwhile, institute
State first couple of external port A, second couple of external port B, the 3rd couple of external port Z, the 4th couple of external port Y be respectively used to 422/485 every
The A pins of off-chip piece, B pins, Z pins, the connection of Y pins；Meanwhile, second couple of external port B, the 3rd couple of external port Z are also used
It is connected in H pins respectively with CAN isolating chip, L pins.
2. CAN as claimed in claim 1 and 422/485 common interface circuit, it is characterised in that the control chip is adopted
Use chip STM32F303VBT6.
3. CAN as claimed in claim 2 and 422/485 common interface circuit, it is characterised in that pin I is control core
Piece STM32F303VBT6 pin PB9, pin II is control chip STM32F303VBT6 pin PB8, and pin III is control
Chip STM32F303VBT6 pin PD5, pin IV is control chip STM32F303VBT6 pin PD6.
4. CAN as claimed in claim 1 and 422/485 common interface circuit, it is characterised in that CAN isolated core
Piece uses chip I SO1050, and 422/485 isolating chip uses chip I SO3086.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720013682.9U CN206490682U (en) | 2017-01-06 | 2017-01-06 | CAN and 422/485 common interface circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720013682.9U CN206490682U (en) | 2017-01-06 | 2017-01-06 | CAN and 422/485 common interface circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206490682U true CN206490682U (en) | 2017-09-12 |
Family
ID=59771479
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720013682.9U Withdrawn - After Issue CN206490682U (en) | 2017-01-06 | 2017-01-06 | CAN and 422/485 common interface circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206490682U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106789516A (en) * | 2017-01-06 | 2017-05-31 | 四川埃姆克伺服科技有限公司 | A kind of CAN and 422/485 common interface circuit |
-
2017
- 2017-01-06 CN CN201720013682.9U patent/CN206490682U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106789516A (en) * | 2017-01-06 | 2017-05-31 | 四川埃姆克伺服科技有限公司 | A kind of CAN and 422/485 common interface circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20170912 Effective date of abandoning: 20220805 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20170912 Effective date of abandoning: 20220805 |
|
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |