CN101797907A - Plug-controlled vehicle-mounted electrical control system program download circuit - Google Patents
Plug-controlled vehicle-mounted electrical control system program download circuit Download PDFInfo
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- CN101797907A CN101797907A CN 201010144576 CN201010144576A CN101797907A CN 101797907 A CN101797907 A CN 101797907A CN 201010144576 CN201010144576 CN 201010144576 CN 201010144576 A CN201010144576 A CN 201010144576A CN 101797907 A CN101797907 A CN 101797907A
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- plug
- control system
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Abstract
The invention relates to a plug-controlled vehicle-mounted electrical control system program download circuit. The circuit comprises an electrical control system download on-off control circuit and a special download plug, wherein the electrical control system download on-off control circuit consists of an analogue switch MAX4066; under the control of the special download plug, a thirteenth pin IN1 and a fifth pin IN2 of the MAX4066 are grounded; two channels of a first pin NO1 and a second pin COM1 as well as a third pin NO2 and a fourth pin COM2 are switched on respectively so as to download a program; the special download plug is connected with a CPU downloader and comprises an RESET pin, a BKGD pin, a GND pin, a VCC pin and a CONTRL pin; the CONTRL pin on the plug is short connected with the GND pin; after the plug is inserted into an electrical control system download connector, the program can be downloaded; and after the plug is pulled out, a download port of the CPU is disconnected with the download connector; therefore, the convenience of modifying the program and the anti-interference characteristic during the operation of the CPU are improved.
Description
Technical field
The present invention relates to a kind of controlled vehicle-mounted electrical system program download circuit, be specifically related to a kind of circuit that can download circuit on-off by download plug control program.
Background technology
Some controlled vehicle-mounted electrical system needs frequent refresh routine in the debug phase, for reaching the requirement of aspects such as reliable and disturbance rejection are installed, need be after having upgraded program, fix and install housing, will cause the repeated open housing to carry out the programming of program like this, if electric-control system is installed in machinery space or the position of inconvenience dismounting such as in power battery box inside, the then great inconvenience that causes to program updates.Throw away the problem that can solve the inconvenience that downloads from the electric-control system circuit card for a long time though will download wire harness, but can be because download the antenna effect of wire harness, interfering signal is introduced in the operation of electric-control system CPU, caused resetting, improper situation such as program fleet occurs.Also there is not relevant patent at present.
Summary of the invention
The objective of the invention is to overcome existing controlled vehicle-mounted electrical system program download needs repeated open ECU (Electrical Control Unit) housing or throws away the shortcoming that program download wire harness causes introducing interfering signal for a long time, proposes a kind of circuit that utilizes the analog switch control program to download circuit on-off.The present invention can connect the program download channel automatically after program is downloaded the program download port that plug is inserted into ECU (Electrical Control Unit), the program of finishing is downloaded.After the program of extracting was downloaded plug, program was downloaded the circuit automatic cutout, cut off the program download circuit of CPU, thereby had reduced to be disturbed because of CPU program download port the chaotic problem of program of initiation, and is simple in structure, dependable performance.
Plug-controlled vehicle-mounted electrical control system program download circuit of the present invention comprises electric-control system download on-off control circuit and specific download plug; Electric-control system is downloaded on-off control circuit and is adopted analog switch MAX4066 to realize, in the double switch passage of MAX4066, one end of double switch passage connects BKGD pin and the RESET pin that electric-control system CPU downloads used respectively, the other end of double switch passage is connected respectively to downloads connector BKGK0 terminal and RESET0 terminal, the above-mentioned double switch channel control signals IN1 of MAX4066 and the CONTRL terminal that is connected to the download connector after IN2 is in parallel.Download connector and also comprise the GND terminal and the VCC terminal of drawing from ECU (Electrical Control Unit).The specific download plug is used with downloading connector, and the terminal definition is identical, and with CONTRL pin on the specific download plug and GND pin short circuit.
Description of drawings
Further specify the present invention below in conjunction with the drawings and the specific embodiments.
Fig. 1 electric-control system is downloaded the on-off control circuit schematic diagram;
Fig. 2 program is downloaded and is connected arrangement plan.
The specific embodiment
The present invention includes electric-control system and download on-off control circuit and specific download plug.Electric-control system is downloaded on-off control circuit and is made of analog switch MAX4066.
Fig. 1 is that electric-control system of the present invention is downloaded the on-off control circuit schematic diagram.As shown in Figure 1, this control circuit is made of analog switch MAX4066,13 pin IN1 and 5 pin IN2 ground connection by specific download plug control MAX4066, make 1 pin NO1 and 2 pin COM1,3 pin NO2 and 4 pin COM2 conductings respectively, the CPU downloader is linked to each other with the REST pin with the BKGD pin of electric-control system CPU with described two paths by the specific download plug, realize the download of controlled vehicle-mounted electrical system program.
The concrete connection mode of electric-control system download on-off control circuit is the BKGD pin that the 1 pin NO1 of MAX4066 meets electric-control system CPU, and the 2 pin COM1 of MAX4066 connect and download connector 1 terminal BKGD0; The 3 pin NO2 of MAX4066 connect the REST pin of electric-control system CPU, and are pulled to power supply VCC by resistance R 155, and the 4 pin COM2 of MAX4066 connect and download connector 4 terminal REST0; The 13 pin IN1 of MAX4066 and 5 pin IN2 and connect after connect and download connector 3 terminal CONTRL.14 pins of MAX4066 meet electric-control system power supply VCC, and 7 pins meet electric-control system ground GND, and capacitor C 8 is serially connected between 14 pin and 7 pin and plays buffer action.
Fig. 2 is that program is downloaded the connection arrangement plan.As shown in Figure 2,1 pin of specific download plug of the present invention connects the BKGD terminal of CPU downloader, 2 pin GND of specific download plug and 3 pin CONTRL short circuits, 4 pin of specific download plug connect the RESET terminal of CPU downloader, and specific download plug 5 pin connect the VCC terminal of CPU downloader.
After being inserted into the download connector that is mated use when the specific download plug, the 13 pin IN1 of MAX4066 and 5 pin IN2 pins are connected by CONTRL terminal on the specific download plug and GND, control 1 pin NO1 and 2 pin COM1,3 pin NO2 and the 4 pin COM2 conductings of MAX4066 respectively, thereby the BKGD terminal of realizing the CPU downloader links to each other with the RESET pin of electric-control system CPU with the BKGD pin of electric-control system CPU, the RESET terminal of CPU downloader, can realize the download of controlled vehicle-mounted electrical system program.After extracting this plug, the 13 pin IN1 of MAX4066 and 5 pin IN2 pins disconnect with ground, thereby the BKGD pin of above-mentioned CPU and RESET pin are disconnected with the BKGD0 terminal of downloading connector and RESET0 terminal, reduce the interference to the above-mentioned pin of CPU.
Claims (3)
1. a plug-controlled vehicle-mounted electrical control system program download circuit is characterized in that described circuit comprises electric-control system download on-off control circuit and specific download plug; Electric-control system is downloaded on-off control circuit and is made of analog switch MAX4066,13 pin IN1 and 5 pin IN2 ground connection by specific download plug control MAX4066, make 1 pin N01 and 2 pin COM1,3 pin N02 and the 4 pin COM2 two paths conductings of MAX4066 respectively, the CPU downloader is linked to each other with the REST pin with the BKGD pin of electric-control system CPU with described two paths by the specific download plug.
2. plug-controlled vehicle-mounted electrical control system program download circuit according to claim 1 is characterized in that the 1 pin NO1 of described MAX4066 connects the BKGD pin of electric-control system CPU, and the 2 pin COM1 of MAX4066 connect and download connector 1 terminal BKGD0; The 3 pin NO2 of MAX4066 connect the REST pin of electric-control system CPU, and are pulled to VCC by resistance R 155, and the 4 pin COM2 of MAX4066 connect and download connector 4 terminal REST0; The 5 pin IN1 of MAX4066 and 13 pin IN2 and connect after connect and download connector 3 terminal CONTRL; The 14 pin power connection VCC of MAX4066,7 pin ground connection GND, capacitor C 8 plays buffer action between 14 pin and 7 pin.
3. plug-controlled vehicle-mounted electrical control system program download circuit according to claim 1 is characterized in that described specific download plug and download connector are used; One end of described specific download plug links to each other with the CPU downloader, and the other end inserts to be downloaded in the connector; Specific download plug 1 pin connects the BKGD terminal of CPU downloader, 2 pin GND and 3 pin CONTRL short circuits, and 4 pin connect the RESET terminal of CPU downloader, and 5 pin connect the VCC terminal of CPU downloader.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101445767A CN101797907B (en) | 2010-04-09 | 2010-04-09 | Plug-controlled vehicle-mounted electrical control system program download circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101445767A CN101797907B (en) | 2010-04-09 | 2010-04-09 | Plug-controlled vehicle-mounted electrical control system program download circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101797907A true CN101797907A (en) | 2010-08-11 |
| CN101797907B CN101797907B (en) | 2012-05-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010101445767A Active CN101797907B (en) | 2010-04-09 | 2010-04-09 | Plug-controlled vehicle-mounted electrical control system program download circuit |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6182190B1 (en) * | 1998-06-15 | 2001-01-30 | Mitsubishi Denki Kabushiki Kaisha | Automobile controller |
| EP1111483A1 (en) * | 1998-07-06 | 2001-06-27 | Toyota Jidosha Kabushiki Kaisha | Method and apparatus for assisting development of program for vehicle |
| CN1825281A (en) * | 2005-02-26 | 2006-08-30 | 乐金电子(中国)研究开发中心有限公司 | Binary document download method wireless communication module for vehicle carrying communication |
| CN201392473Y (en) * | 2009-04-16 | 2010-01-27 | 合肥创源智能网络有限责任公司 | Vehicle network system with on-line debugging and program downloading functions |
-
2010
- 2010-04-09 CN CN2010101445767A patent/CN101797907B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6182190B1 (en) * | 1998-06-15 | 2001-01-30 | Mitsubishi Denki Kabushiki Kaisha | Automobile controller |
| EP1111483A1 (en) * | 1998-07-06 | 2001-06-27 | Toyota Jidosha Kabushiki Kaisha | Method and apparatus for assisting development of program for vehicle |
| CN1825281A (en) * | 2005-02-26 | 2006-08-30 | 乐金电子(中国)研究开发中心有限公司 | Binary document download method wireless communication module for vehicle carrying communication |
| CN201392473Y (en) * | 2009-04-16 | 2010-01-27 | 合肥创源智能网络有限责任公司 | Vehicle network system with on-line debugging and program downloading functions |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101797907B (en) | 2012-05-23 |
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