ELM327LP Datasheet, PDF (3/94 Pages) ELM Electronics – Automatically searches for protocols

ELM327L
Contents
Advanced Features
(continued)
Programming Serial Numbers....................................................64
Saving a Data Byte.................................................................... 64
The Activity Monitor....................................................................65
Power Control............................................................................ 65
Programmable Parameters........................................................ 69
Programmable Parameter Summary......................................... 70
Design Discussions
Maximum CAN Data Rates........................................................ 75
Microprocessor Interfaces..........................................................77
Upgrading Versions....................................................................78
Example Applications.................................................................79
Figure 9 - An OBD to USB Interpreter (5.0V)...................... 81
Figure 10 - Parts List for Figure 9........................................ 82
Figure 11 - A Low Speed RS232 Interface.......................... 82
Figure 12 - A High Speed RS232 Interface......................... 83
Figure 13 - An Alternative USB Interface............................ 83
Figure 14 - Connecting to a 3.3V System............................84
Figure 15 - An OBD to USB Interpreter (3.3V).................... 85
Modifications for Low Power Standby Operation....................... 86
Misc. Information
Error Messages and Alerts.........................................................89
Version History...........................................................................91
Ordering Information.................................................................. 91
Outline Diagrams....................................................................... 92
Copyright and Disclaimer........................................................... 92
Index.......................................................................................... 93
ELM327L DSA
Elm Electronics – Circuits for the Hobbyist
www.elmelectronics.com
3 of 94