Kontron ETX-LX - Manual (Page 16)

4 Connector X1 Subsystems
Kontron User's Guide ETX®-LX 16
4 Connector X1 Subsystems
4.1 PCI Bus
The implementation of this subsystem complies with the ETX® Specification. Implementation
information is provided in the ETX® Design Guide. Refer to the documentation for additional
information.
4.2 USB
One OHCI and EHCI USB host controller each supporting both version 1.1 and 2.0 USB standards are on
the Geode™ CS5536 Companion Device. A total of 4 USB ports are provided.
Configuration
The USB controllers are PCI bus devices. The BIOS allocates required system resources during
configuration of the PCI bus.
4.3 Audio
The sound function on the ETX®-LX board comes from an AC‘97 controller integrated in the Geode™
CS5536 Companion Device and a Realtek ALC203 AC‘97 Codec. The 20-bit DAC, 18-bit ADC, AC'97 2.3
compatible, full-duplex codec supports a Line In, a Stereo Line Out, and a Mono Microphone In
interface.
Configuration
The audio controller is a PCI bus device. The BIOS allocates required system resources during
configuration of the PCI device.
4.4 Serial IRQ
The serial IRQ pin offers a standardized interface to link interrupt request lines to a single wire.
Configuration
The serial IRQ machine is in ―Quiet Mode‖, the frame size is 21 frames and the
start frame pulse width
is
4 clocks.
4.5 3.3V Power Supply for External Components
The ETX®-LX offers the ability to connect external 3.3V devices to the onboard-generated supply voltage.
Pin 12 and Pin 16 of Connector X1 are used to connect to the +3.3V ±5% power supply. The maximum
external load is 500mA. Contact Kontron Embedded Systems Technical Support for help with this
feature.
Warning: Do not connect 3.3 V pins to an external 3.3 V supply!