CN206321980U - Jtag interface turns RS422 interface experiment devices - Google Patents
Jtag interface turns RS422 interface experiment devices Download PDFInfo
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- CN206321980U CN206321980U CN201621319695.0U CN201621319695U CN206321980U CN 206321980 U CN206321980 U CN 206321980U CN 201621319695 U CN201621319695 U CN 201621319695U CN 206321980 U CN206321980 U CN 206321980U
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- pin
- integrated circuit
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- jtag
- interface
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Abstract
A kind of jtag interface turns RS422 interface experiment devices, has：The CPLD circuit being controlled to device；Multichannel RS422 drive circuits；The circuit is connected with CPLD circuit；Jtag circuit, the circuit is connected with CPLD circuit；The present apparatus is reasonable in design, simple in construction, peripheral component is few, low cost, data processing speed fast, equipment Internet of Things ability is strong, with high speed data transfer ability, can promote the use of telecommunication circuit peripheral hardware and be connected apparatus field with master control equipment.
Description
Technical field
The utility model belongs to technical field of integrated circuits, and in particular to turn RS422 interface experiments dress to a kind of jtag interface
Put.
Background technology
A kind of CPLD be user according to respective need voluntarily digital integrated electronic circuits of constitutive logic function.Its Basic Design
Method is, by Integrated Development software platform, with methods such as schematic diagram, hardware description languages, to generate corresponding file destination, lead to
Cross download cable code is sent in objective chip, realize the digital display circuit of design.
It is relatively early that RS422 circuits occur, and is widely used in measurement by people, controls, in data transfer.At present, it is based on
The peripheral hardware of RS422 circuits is more, however, when the peripheral hardware of SPI circuit is connected into main control device, main control device usually occurs
Serial ports passage is not enough, it is impossible to the problem of being connected to main control device.
These peripheral hardwares will be connected to the conventional way of main control device：First, main controller module is added, expands serial ports and leads to
Road；Secondly, interconnected between two main controllers by connecting line.This way has some shortcomings：Circuit is more complicated, increase
Module and line；Cost increase；Safeguard laborious time-consuming, circuit connection is more, is unfavorable for searching problem；System power dissipation increase.
The content of the invention
Technical problem to be solved in the utility model is to overcome above-mentioned the deficiencies in the prior art, provides a kind of design and closes
Reason, few simple in construction, peripheral component, low cost, data processing speed are soon, equipment Internet of Things ability is strong, passed with high-speed data
The jtag interface of Movement Capabilities turns RS422 interface experiment devices.
Solving the technical scheme of above-mentioned technical problem use is：Have：The CPLD circuit being controlled to device；Multichannel
RS422 drive circuits；The circuit is connected with CPLD circuit；Jtag circuit, the circuit is connected with CPLD circuit.
Multichannel RS422 drive circuits of the present utility model include at least 2 road RS422 drive circuits.
Multichannel RS422 drive circuits of the present utility model include 6 road RS422 drive circuits.
RS422 drive circuits of the present utility model are：The pin of integrated circuit U2 5 pin~2 connects the 165 of integrated circuit U1 successively
The pin of pin~162, integrated circuit U2 6 pin and 7 pin ground connection, 14 pin connect the pin of 5V power supplys, 9 pin~12 successively connecting connector J2 1~4
Pin, integrated circuit U2 model MAX489.
CPLD circuit of the present utility model is：Integrated circuit U1 49 pin, 78 pin, 108 pin, 79 pin connect jtag circuit, collection
182 pin into circuit U 1 connect crystal oscillator Y1 4 pin, the pin of the pin of integrated circuit U1 165 pin~162,154 pin~149,137 pin~134
The pin of the pin of pin, 123 pin, 120 pin, 119 pin, 117 pin, 80 pin, 77 pin~75,67 pin, 65 pin~63 connects multichannel RS422 driving electricity
Road, integrated circuit U1 48 pin, 5 pin, 25 pin, 36 pin, 55 pin, 72 pin, 91 pin, 111 pin, 127 pin, 138 pin, 159 pin, 176
Pin, 195 pin connect 3V power supplys, and integrated circuit U1 10 pin, 19 pin, 30 pin, 45 pin, 112 pin, 128 pin, 139 pin, 148 pin meet 5V
Power supply, the pin of integrated circuit U1 14 pin, 20 pin, 24 pin, 31 pin, 35 pin, 41 pin~44,46 pin, 47 pin, 66 pin, 85 pin, 102
The pin of pin, 110 pin, 113 pin~116,118 pin, 121 pin, 122 pin, 132 pin, 133 pin, 143 pin, 152 pin, 170 pin, 189 pin,
206 pin are grounded, and crystal oscillator Y1 1 pin connects 3V power supplys, 3 pin ground connection；Integrated circuit U1 model EPM9560ARC208-10, crystal oscillator
Y1 model JHY50M.
Start jtag circuit control logic because the utility model employs CPLD circuit, receive data and data are carried out
Processing, decodes out the channel data that will be transmitted, and starts serial ports control logic, transmits data to 6 road RS422 drive circuits
Any serial ports all the way, while CPLD circuit has detected whether that data are sent from RS422 drive circuits, there is data transmission
When, CPLD circuit receives data and adds corresponding channel data, transmits data to jtag circuit；The present apparatus is reasonable in design,
Simple in construction, peripheral component is few, low cost, data processing speed fast, equipment Internet of Things ability is strong, with high speed data transfer energy
Power, can promote the use of communication equipment and peripheral hardware main control device connection area.
Brief description of the drawings
Fig. 1 is electrical principle block diagram of the present utility model.
Fig. 2 is electronic circuit schematic diagram of the present utility model.
Embodiment
The utility model is described in further details with reference to the accompanying drawings and examples, but the utility model is not limited to this
A little embodiments.
Embodiment 1
In Fig. 1, the utility model jtag interface turns RS422 interface experiments device by CPLD circuit, multichannel RS422 drivings
Circuit, jtag circuit are connected and composed, and jtag circuit is connected with CPLD circuit, multichannel RS422 telecommunication circuits and CPLD circuit phase
Connection.
In fig. 2, the CPLD circuit of the present embodiment is connected and composed by integrated circuit U1, crystal oscillator Y1, integrated circuit U1 type
Number be EPM9560ARC208-10, crystal oscillator Y1 model JHY50M.Integrated circuit U1 49 pin, 78 pin, 108 pin, 79 pin connect
Jtag circuit, integrated circuit U1 182 pin connect crystal oscillator Y1 4 pin, the pin of integrated circuit U1 165 pin~162,154 pin~149
The pin of the pin of the pin of pin, 137 pin~134,123 pin, 120 pin, 119 pin, 117 pin, 80 pin, 77 pin~75,67 pin, 65 pin~63 connects multichannel
RS422 drive circuits, integrated circuit U1 48 pin, 5 pin, 25 pin, 36 pin, 55 pin, 72 pin, 91 pin, 111 pin, 127 pin, 138
Pin, 159 pin, 176 pin, 195 pin connect 3V power supplys, integrated circuit U1 10 pin, 19 pin, 30 pin, 45 pin, 112 pin, 128 pin, 139
Pin, 148 pin connect 5V power supplys, the pin of integrated circuit U1 14 pin, 20 pin, 24 pin, 31 pin, 35 pin, 41 pin~44,46 pin, 47 pin, 66
The pin of pin, 85 pin, 102 pin, 110 pin, 113 pin~116,118 pin, 121 pin, 122 pin, 132 pin, 133 pin, 143 pin, 152 pin,
170 pin, 189 pin, 206 pin ground connection, crystal oscillator Y1 1 pin connect 3V power supplys, 3 pin ground connection.
In fig. 2, the multichannel RS422 drive circuits of the present embodiment are made up of 6 road RS422 drive circuits, can also be by more
Multichannel or less road RS422 drive circuits are constituted.First via RS422 drive circuits are by integrated circuit U2, connector J2 connections
Constitute, integrated circuit U2 model MAX489, the pin of integrated circuit U2 5 pin~2 connect successively integrated circuit U1 165 pin~
162 pin, integrated circuit U2 6 pin and 7 pin ground connection, 14 pin connect the pin of 5V power supplys, 9 pin~12 connecting connector J2 successively 1~4 pin.
Second road RS422 drive circuits are connected and composed by integrated circuit U3, connector J3, integrated circuit U3 model MAX489, collection
The pin of 5 pin~2 into circuit U 3 connects the pin of integrated circuit U1 154 pin~149, integrated circuit U2 6 pin and 7 pin ground connection, 14 successively
Pin connects the pin of 5V power supplys, 9 pin~12 connecting connector J3 successively 1~4 pin.3rd road RS422 drive circuits are by integrated circuit U4, company
Meet device J4 to connect and compose, integrated circuit U4 model MAX489, the pin of integrated circuit U4 5 pin~2 meets integrated circuit U1 successively
The pin of 137 pin~134, integrated circuit U4 6 pin and 7 pin ground connection, 14 pin meet the pin of 5V power supplys, 9 pin~12 connecting connector J4 successively
1~4 pin.4th road RS422 drive circuits are connected and composed by integrated circuit U5, connector J5, integrated circuit U5 model
The pin of MAX489, integrated circuit U5 5 pin~2 connects integrated circuit U1 123 pin, 120 pin, 119 pin, 117 pin, integrated circuit successively
U5 6 pin and 7 pin ground connection, 14 pin connect the pin of 5V power supplys, 9 pin~12 connecting connector J5 successively 1~4 pin.5th road RS422 drives
Circuit is connected and composed by integrated circuit U6, connector J6, integrated circuit U6 model MAX489, integrated circuit U6 5 pin~2
Pin connects integrated circuit U1 80 pin, 77 pin, 76 pin, 75 pin successively, and integrated circuit U6 6 pin and 7 pin ground connection, 14 pin connect 5V electricity
Source, the pin of 9 pin~12 connecting connector J6 successively 1~4 pin.6th road RS422 drive circuits are connected by integrated circuit U7, connector J7
Connect composition, integrated circuit U7 model MAX489, the pin of integrated circuit U7 5 pin~2 connects integrated circuit U1 67 pin, 65 successively
Pin, 64 pin, 63 pin, integrated circuit U7 6 pin and 7 pin ground connection, 14 pin connect the pin of 5V power supplys, 9 pin~12 successively connecting connector J7 1
~4 pin.
In fig. 2, the jtag circuit of the present embodiment is made up of resistance R1~resistance R4, connector J1.Connector J1 5 pin
~2 pin connect integrated circuit U1 49 pin, 78 pin, 108 pin, 79 pin by resistance R1~resistance R4 respectively, and connector J1 1 pin connects
Ground.
Operation principle of the present utility model is as follows：
System electrification, crystal oscillator Y1 work, first, integrated circuit U1 starts initial work, completes CPLD hardware configuration
Work：Control logic including JTAG, the control logic of 6 road serial ports.Hereafter, circuit enters normal operating conditions.
First, the integrated circuit U1 moment has detected whether that data are sent from JTAG modular circuits, i.e., sent out from connector J1
Send.When there is data transmission, data are exported from connector J1 2 pin, by resistance R4, are input to the 79 of integrated circuit U1
Pin.Secondly, integrated circuit U1 starts JTAG control logic, receives data, and data are handled, and decoding out to transmit
Channel data, and start the control logic of serial ports, transmit data to corresponding serial ports：165 pin of the data from integrated circuit U1
Output, is input to integrated circuit U2, by integrated circuit U2 level translation, and 9 pin, the output of 10 pin from integrated circuit U2 are defeated
Enter to connector J2, so as to realize that jtag interface data are sent to RS422 interfaces.Or data are defeated from integrated circuit U1 154 pin
Go out, be input to integrated circuit U3, by integrated circuit U3 level translation, 9 pin, the output of 10 pin, input from integrated circuit U3
To connector J3, so as to realize that jtag interface data are sent to RS422 interfaces.Or data are exported from integrated circuit U1 137 pin,
Integrated circuit U4 is input to, by integrated circuit U4 level translation, 9 pin, the output of 10 pin, the company of being input to from integrated circuit U4
Device J4 is met, so as to realize that jtag interface data are sent to RS422 interfaces.Or data are exported from integrated circuit U1 123 pin, input
To integrated circuit U5, by integrated circuit U5 level translation, 9 pin, the output of 10 pin from integrated circuit U5 are input to connector
J5, so as to realize that jtag interface data are sent to RS422 interfaces.Or data are exported from integrated circuit U1 80 pin, are input to collection
Into circuit U 6, by integrated circuit U6 level translation, 9 pin, the output of 10 pin from integrated circuit U6 are input to connector J6,
So as to realize that jtag interface data are sent to RS422 interfaces.Or data are exported from integrated circuit U1 67 pin, are input to integrated electricity
Road U7, by integrated circuit U7 level translation, 9 pin, the output of 10 pin from integrated circuit U7 are input to connector J7, so that
Realize that jtag interface data are sent to RS422 interfaces.
Again, the integrated circuit U1 moment has detected whether that data are sent from RS422 drive circuits, i.e., from connector J2~
Connector J7 is sent.When there is data transmission, integrated circuit U1 receives data, and adds corresponding channel data, and by this
A little data are sent to jtag interface circuit.Data are exported from connector J2~connector J7 3 pin, 4 pin, are input to integrated circuit
U2~integrated circuit U7, by integrated circuit U2~integrated circuit U7 level translation, from integrated circuit U2~integrated circuit U7
2 pin output, be input to integrated circuit U1.Integrated circuit U1 start 6 road serial ports control logic, and JTAG control logic,
Transmit data to jtag interface circuit.Data are exported from integrated circuit U1 108 pin, by resistance R3, are input to connector
J1, so as to realize RS422 interface data to the transmission of jtag interface data.
Claims (5)
1. a kind of jtag interface turns RS422 interface experiment devices, it is characterised in that：Have：
The CPLD circuit being controlled to device；
Multichannel RS422 drive circuits；The circuit is connected with CPLD circuit；
Jtag circuit, the circuit is connected with CPLD circuit.
2. jtag interface according to claim 1 turns RS422 interface experiment devices, it is characterised in that described multichannel
RS422 drive circuits include at least 2 road RS422 drive circuits.
3. jtag interface according to claim 1 turns RS422 interface experiment devices, it is characterised in that described multichannel
RS422 drive circuits include 6 road RS422 drive circuits.
4. the jtag interface according to Claims 2 or 3 turns RS422 interface experiment devices, it is characterised in that the RS422 drives
Dynamic circuit is：The pin of integrated circuit U2 5 pin~2 connects the pin of integrated circuit U1 165 pin~162 successively, integrated circuit U2 6 pin and
7 pin ground connection, 14 pin connect the pin of 5V power supplys, 9 pin~12 connecting connector J2 successively 1~4 pin, integrated circuit U2 model
MAX489。
5. jtag interface according to claim 1 turns RS422 interface experiment devices, it is characterised in that described CPLD circuit
For：Integrated circuit U1 49 pin, 78 pin, 108 pin, 79 pin connect jtag circuit, and integrated circuit U1 182 pin connect crystal oscillator Y1 4 pin,
The pin of the pin of the pin of integrated circuit U1 165 pin~162,154 pin~149,137 pin~134,123 pin, 120 pin, 119 pin, 117 pin, 80
The pin of the pin of pin, 77 pin~75,67 pin, 65 pin~63 connects multichannel RS422 drive circuits, integrated circuit U1 48 pin, 5 pin, 25 pin, 36
Pin, 55 pin, 72 pin, 91 pin, 111 pin, 127 pin, 138 pin, 159 pin, 176 pin, 195 pin connect 3V power supplys, the 10 of integrated circuit U1
Pin, 19 pin, 30 pin, 45 pin, 112 pin, 128 pin, 139 pin, 148 pin connect 5V power supplys, integrated circuit U1 14 pin, 20 pin, 24 pin,
The pin of the pin of 31 pin, 35 pin, 41 pin~44,46 pin, 47 pin, 66 pin, 85 pin, 102 pin, 110 pin, 113 pin~116,118 pin, 121
Pin, 122 pin, 132 pin, 133 pin, 143 pin, 152 pin, 170 pin, 189 pin, 206 pin ground connection, crystal oscillator Y1 1 pin connect 3V power supplys, 3
Pin is grounded；Integrated circuit U1 model EPM9560ARC208-10, crystal oscillator Y1 model JHY50M.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621319695.0U CN206321980U (en) | 2016-12-04 | 2016-12-04 | Jtag interface turns RS422 interface experiment devices |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621319695.0U CN206321980U (en) | 2016-12-04 | 2016-12-04 | Jtag interface turns RS422 interface experiment devices |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206321980U true CN206321980U (en) | 2017-07-11 |
Family
ID=59265746
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621319695.0U Expired - Fee Related CN206321980U (en) | 2016-12-04 | 2016-12-04 | Jtag interface turns RS422 interface experiment devices |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206321980U (en) |
-
2016
- 2016-12-04 CN CN201621319695.0U patent/CN206321980U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170711 Termination date: 20171204 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |