4.4 Connector X4
The following subsystems can be found on connector X4. The implementation of all the
subsystems comply with ETX
®
specification 2.7. The different subsystems require I/O
and IRQ resources. The necessary resources are allocated by the BIOS during the
POST routine and are configured to be compatible to common PC/AT settings. You can
use the BIOS setup to configure some of the parameters that relate to the specific
subsystems. Check the BIOS Setup Description section for more information about how
to configure a particular subsystem.
4.4.1 IDE
The conga-XLX provides two IDE channels. One channel originates from the CS5536
AMD Geode™ companion device (primary) and the second channel is provided by the
VIA VT6421, which also provides the serial ATA interface. The IDE host adapters are
capable of UDMA 66/100 operation.
If a hard drive is attached to the secondary IDE channel and is to be used as an
installation drive, then the driver must be installed before beginning the installation
process. The driver for the VIA VT6421 can be found on the congatec website. There
are also special instructions included as a README file within the driver package that
explains how to use the hard drive as an OS installation drive for Windows XP and
2000
.
4.4.2 Ethernet
Ethernet interface is provided by a Realtek RTL8100C Single Chip Fast Ethernet NIC
controller. The controller is IEEE 802.3u, 10/100Base-Tx fast Ethernet compatible. The
interface provides single-ended differential signals that have to be routed through an
Ethernet transformer.
4.4.3 I
²
C Bus 400kHz
The I²C bus is implemented through the use of ATMEL ATmega88 microcontroller. It
provides a Fast Mode (400kHz max.) multi-master I²C Bus that has maximum I²C
bandwidth.
4.4.4 Power Control
PWGIN
PWGIN (pin 4 on the X4 connector) can be connected to an external power good circuit
or it may also be utilized as a manual reset input. In order to use PWGIN as a manual
reset the pin must be grounded through the use of a momentary-contact pushbutton
switch. When external circuitry asserts this signal, it's necessary that an open-drain
driver drives this signal causing it to be held low for a minimum of 15ms to initiate a
reset. Using this input is optional. Through the use of an internal monitor on the +5V
input voltage and/or the internal power supplies the conga-XLX module is capable of
generating its own power-on reset.
Copyright © 2006 congatec AG
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