Part No: MPST-CAN-Diagnostic-OBDII-2-UART
On-Board Diagnostics, Second Generation (OBD-II) is a
set of standards for implementing a computer based system to control
emissions from vehicles. It was first introduced in the United States in
1994, and became a requirement on all 1996 and newer US vehicles. Other
countries, including Canada, parts of the European Union, Japan,
Australia, and Brazil adopted similar legislation. A large portion of
the modern vehicle fleet supports OBD-II or one of its regional flavors.
Among other things, OBD-II requires that each compliant vehicle be
equipped with a standard diagnostic connector (DLC) and describes a
standard way of communicating with the vehicle’s computer, also known as
the ECU (Electronic Control Unit). A wealth of information can be
obtained by tapping into the OBD bus, including the status of the
malfunction indicator light (MIL), diagnostic trouble codes (DTCs),
inspection and maintenance (I/M) information, freeze frames, VIN,
hundreds of real-time parameters, and more.
STN1110 is an OBD to UART interpreter that can be used to convert
messages between any of the OBD-II protocols currently in use, and UART.
It is fully compatible with the de facto industry standard ELM327
command set. Based on a 16-bit processor core, the STN1110 offers more
features and better performance than any other ELM327 compatible IC.
STN1110 is a multiprotocol OBD to UART interpreter ("OBD chip") that supports all OBD-II protocols, and is fully compatible with the ELM327 command set, while outperforming the original ELM327 IC in every category: stability, performance, features, and price.
- Stable, field-tested firmware
- Fully compatible with the ELM327 AT command set
- Extended ST command set
- UART interface (baud rates from 38 bps to 10 Mbps*)
- Secure bootloader for easy firmware updates
- Support for 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 (Ford vehicles)
- Support for non-legislated OBD protocols:
- ISO 15765
- ISO 11898 (raw CAN)
- Support for the heavy-duty SAE J1939 OBD protocol
- Superior automatic protocol detection algorithm
- Large memory buffer
- Sophisticated PowerSave Sleep/Wakeup Triggers
- Available in SPDIP, SOIC and QFN-S packages
- RoHS compliant
*This is the maximum theoretical baud rate. The actual maximum baud rate is application-dependent and may be limited by driver hardware.
- Solid, field-tested software: STN1110 runs the same proven code that powers the popular OBDLink family of PC-based OBD interfaces. Thanks to its large user base, any problems are discovered and corrected quickly.
- Large OBD message buffer: STN1110 has over five times as much RAM as its nearest competitor, virtually eliminating BUFFER OVERFLOW errors.
- Automatic protocol detection algorithm: Its continuously fine-tuned to insure that STN1110 will connect to the widest array of vehicles, even those that do not fully conform to the OBD standard.
- Vehicle telematics
- Fleet management and tracking applications
- Usage-based insurance (UBI)
- OBD data loggers
- Automotive diagnostic scan tools and code readers
- Digital dashboards
PowerSave Sleep/Wakeup Triggers
The diagram shows the various triggers available in the STN11xx family of ICs.