Kontron ETX-LX - Manual (Page 23)

7 Connector X4 Subsystems
Kontron User's Guide ETX®-LX 23
7.5 Miscellaneous Circuits
7.5.1 Speaker
The implementation of the speaker output complies with the ETX® Specification. Implementation
information is provided in the
ETX® Design Guide. Refer to the documentation for additional
information.
7.5.2 Battery
The implementation of the battery input complies with the ETX® Specification. Implementation
information is provided in the ETX® Design Guide. Refer to the documentation for additional
information.
In compliance with EN60950, there are at least two current-limiting devices (resistor and diode)
between the battery and the consuming component.
7.5.3 I 2 C Bus
The ETX®-LX provides a software-driven I 2 C port to communicate with external I 2 C slave devices. This port
is implemented on ETX® Pins I2DAT and I2CLK.
You also can access the I 2 C Bus via JUMPtec‘s Intelligent Device Architecture (JIDA) BIOS functions.
For additional information, refer to the ETX® Design Guide. I 2 C application notes and JIDA specifications
are available at the Kontron Web site.
7.5.4 SM Bus
System Management (SM) bus signals are connected to the SM bus controller, which is located in the
AMD Geode CS5536 Companion Device. For more information about the SM bus, please see the System
Management (SM) Bus section in the
Appendix B: System Resources chapter.