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ELM327
Elm Electronics – Circuits for the Hobbyist
www.elmelectronics.com
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ELM327DSJ
Contents
Advanced Features Programming Serial Numbers....................................................63
(continued) Saving a Data Byte.................................................................... 63
The Activity Monitor....................................................................64
Power Control............................................................................ 64
Programmable Parameters........................................................68
Programmable Parameter Summary......................................... 69
Design Discussions Maximum CAN Data Rates........................................................74
Microprocessor Interfaces..........................................................76
Upgrading Versions....................................................................77
Example Applications.................................................................78
Figure 9 - An OBD to USB Interpreter.................................80
Figure 10 - Parts List for Figure 9........................................81
Figure 11 - A Low Speed RS232 Interface..........................81
Figure 12 - A High Speed RS232 Interface.........................82
Figure 13 - An Alternative USB Interface............................ 82
Figure 14 - Connecting to a 3.3V System............................83
Modifications for Low Power Standby Operation....................... 84
Misc. Information Error Messages and Alerts.........................................................87
Version History...........................................................................90
Outline Diagrams....................................................................... 92
Ordering Information.................................................................. 92
Copyright and Disclaimer...........................................................92
Index.......................................................................................... 93
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