Table of Contents
Advertisement
4 ETX® Connectors
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.
USB
The Universal Serial Bus controller is USB v2.0 / 1.1 and Universal HCI v2.0 / 1.1 compliant. The VT8237S
includes four root hubs with eight function ports with integrated physical layer transceivers. The USB
controller allows hot plug and play and isochronous peripherals to be inserted into the system with
universal driver support. The controller also implements legacy keyboard and mouse support so legacy
software can run transparently in a non-USB-aware OS environment
Configuration
The USB controllers are PCI bus devices. The BIOS allocates required system resources during
configuration of the PCI bus.
Note:
Only 2 root hubs with 4 ports are wired with the ETX® connector according to the ETX® standard
Audio
The ETX®-CN8 PCI audio controller is integrated in the VIA® VT8237S southbridge. The audio codec is
compatible with AC97.
Configuration
The audio controller is a PCI bus device. The BIOS allocates required system resources during
configuration of the PCI device.
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.
3.3V Power Supply for External Components
The ETX®-CN8 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 external 3.3 V supply.
Kontron User's Guide ETX®-CN8
21
Advertisement
Table of Contents
