STN1170 OBD-II, SW-CAN, MS-CAN to UART Interpreter IC

STN1170 combines the entire STN1110 (multiprotocol OBD-II) feature set with Single Wire CAN (SW-CAN) and Medium Speed CAN (MS-CAN) protocols in a single 44-pin IC. SW-CAN protocol support allows your device to access, monitor and issue commands on vehicles utilizing GM’s proprietary CAN network. Similarly, MS-CAN provides access to Ford’s proprietary CAN network on supporting models.

On vehicles hosting SW-CAN or MS-CAN networks, our enhanced ST command set allows your device to interpret data not available on the vehicle’s OBD-II bus. Using the GM & Ford proprietary codes, you can commonly interpret current status of systems such as:

• Seat belt
• Airbag
• Headlight
• Anti-Lock Brake (ABS)
• Traction Control

Control commands commonly found on supported vehicles include:

• Door lock/unlock
• Window up/down
• Radio volume up/down
• Turn signals & Hazard on/off
• Engine start/kill

While STN1170 ST commands will provide access to SW-CAN and MS-CAN networks, the proprietary GM & Ford codes must be obtained independently. A popular method is to join the Equipment and Tool Institute where the codes can be accessed/purchased. Alternately, the traffic can be analyzed and reverse engineered.

KEY FEATURES

• 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 dozens of existing software applications.
• Extended “ST” command set provides access to enhanced functionality, without compromising compatibility.
• PowerSave mode with multiple sleep and wakeup triggers. Ideal for permanent in-vehicle setups, device can be left connected for extended periods of time without draining the battery.
• Perfect form factor for any application. STN1170 is available in TQFP and QFN packages.
• RoHS compliant

STABILITY

• Solid, field-tested software. STN1170 runs the same proven code that powers the popular STN1110 and OBDLink family of PC-based OBD interfaces. Thanks to its large user base, any problems are discovered and corrected quickly.
• Large OBD message buffer. STN1170 has over five times as much RAM as its nearest competitor, virtually eliminating BUFFER OVERFLOW errors.
• Automatic protocol detection algorithm is continuously fine-tuned to insure that STN1170 will connect to the widest array of vehicles, even those that do not fully conform to the OBD-II standard.

POWERSAVE TECHNOLOGY

This diagram shows the various triggers available in the STN11xx family of ICs. Please refer to the STN11xx PowerSave Functionality documentation for more details.

• All legislated OBD II protocols:
  • ISO 15765-4 (CAN 250/500 kbps, 11/29 bit)
  • ISO 14230-4 (Keyword Protocol 2000)
  • ISO 9141-2 (Asian, European, Chrysler)
  • SAE J1850 VPW (GM)
  • SAE J1850 PWM (Ford)
• Non-legislated OBD protocols:
  • Single-Wire CAN (SW-CAN) – GM proprietary network
  • Medium-Speed CAN (MS-CAN) – Ford proprietary network
  • ISO 15765
  • ISO 11898 (raw CAN)
• SAE J1939 OBD protocol used in heavy-duty vehicles

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