http://faq.ford77.ru/pdf/eec/DataSheet.pdf FEATURES:Operating Voltage 5.0 VOperating Current 5 Ma. TypClock: 20 MHzInputs: (0-5V levels)Serial Input (19200 Baud)PWM receiveVPW receiveISO 9141-2Outputs (0-5V levels)Serial output (19200 Baud)PWM transm…

http://www.obdexperts.co.uk/stack.html OBD II Software OBD Experts can provide you with ready to use off-the-shelf OBD II software implementing the following automotive protocols: ISO 9141-2 KWP 2000-4 SAE J1850 PWM (Ford SCP) SAE J1850 VPW (GM Class…

http://en.wikipedia.org/wiki/On-board_diagnostics#Standards_documents SAE standards documents on OBD-II J1962 - Defines the physical connector used for the OBD-II interface. J1850 - Defines a serial data protocol. There are 2 variants- 10.4 kbit/s (s…

http://www.auto-diagnostics.info/j1850 j1850 The SAE J1850 bus bus is used for diagnostics and data sharing applications in vehicles. The J1850 bus takes two forms: 41.6Kbps Pulse Width Modulated (PWM) two wire differential approach (Ford vehicles) 1…

---恢复内容开始--- OBDII Interface Project When I can ever find enough time away from schoolwork, I try to work on an OBDII compliant portable ScanTool. However, with my current course load and lab projects progress on this project has been very slow. I fi…

汽车上的OBD-II接口(母):  ELM327用到的引脚: 2: SAE-J1850 PWM和SAE-1850 VPW总线(+) 4. 车身地 5. 信号地 6. CAN high (ISO 15765-4和SAE-J2284)  7. ISO 9141-2和ISO 14230-4总线的K线 10. SAE-J1850 PWM协议总线(-)(not SAE-1850 VPW) Europe, etc. Chrysler CCD Bus(+) 14. CAN low (ISO 15765-4和S…

http://www.obdsol.com/stn1110/ Safe, secure bootloader. Reflash the firmware in the field, even over a poor quality link and avoid expensive product recalls. Fully compatible with ELM327 command set, ensuring out-of-the-box compatibility with the doz…

http://www.obdsol.com/stn1170/ STN1170 supports the following protocols: all legislated OBD II protocols: ISO 15765-4 (CAN) ISO 14230-4 (Keyword Protocol 2000) ISO 9141-2 (Asian, European, Chrysler vehicles) SAE J1850 VPW (GM vehicles) SAE J1850 PWM…

OBD-II Network Standards» J1850 VPW– Adopted by GM; also known as Class 2.– Adopted by Chrysler (known as J1850).– Some references to VPW mode heard about in regards to Toyota (and Honda ?).– 10.4 kbps, single wire.» J1850 PWM– Adopted by Ford; also…

http://www.dpfdoctor.net/content/?220.html SAE J1850 VPW协议也是OBD II标准中的一种,通常应用于GM车系中. VPW英文全称是Variable Pulse Width Modulated,即可变脉宽调制. 下面从物理层特性.电平接口.帧结构.命令交互.交互时间参数.常用命令字等几个方面来介绍这种协议. Ø  物理层特性:采用10.4KB/S的波特率:通讯电平通常为7.5V:每个字节采用8位二进制数形式,没有起始位.停止位和校验位:通讯引…