Kontron ETX-DC, Руководство пользователя

Страница: 40 / 84

ETX-DC®/ Special Features
34
5 Special Features
5.1 Watchdog Timer
The watchdog timer is implemented within the Winbond W83627HG. The WDT can also be controlled by the JIDA BIOS
support. The application software should strobe the WDT to prevent its timeout. Upon timeout, the WDT resets and
restarts the system. This provides a way to recover from program crashes or lockups.
Configuration
You can program the timeout period for the watchdog timer in two ranges:
» 1-second increments from 1 to 255 seconds
» 1-minute increments from 1 to 255 minutes
The watchdog can release a NMI or a reset.
Contact Kontron Embedded Modules technical support for information on programming and operating the WDT.
5.2 SATA Support
The ETX®-DC supports two SATA ports compliant to the ETX® 3.0 specification
5.3 Restrictions
The ETX-DC® has following restrictions compared to some other ETX® products:
5.3.1 ISA Bus
The ETX-DC® is usually equipped with a PCI2ISA bridge which does not support DMA transfers; therefore e.g. the
floppy interface of an external SuperI/O controller is not supported.
Optionally a LPC2ISA bridge can be equipped as a customized version of the product, but then there is only very
limited memory access on ISA bus possible.
5.3.2 ISA VGA
There is no support for ISA graphic cards on ETCX-DC®.
5.3.3 LVDS
The ETX-DC® supports only 18bit LVDS panels, because only 3 LVDS data pairs are supported by the chipset.