Kontron ETX-DC - Page 4

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4.6 Connector X3 Signal Description ................................................................................................................. 24
4.7 Connector X4 Subsystems.......................................................................................................................... 26
4.7.1 Connector X4 (IDE 1, IDE 2, Ethernet, Miscellaneous) ................................................................................... 26
4.7.2 Connector X4 (Signal Levels) .................................................................................................................... 27
4.7.3 Connector X4 Signal Description ............................................................................................................... 29
4.8 SDVO Connector J9 .................................................................................................................................. 31
4.8.1 Location of the connector ........................................................................................................................ 31
4.8.2 SDVO Output ......................................................................................................................................... 31
4.8.3 Connector and Flat Foil Cable ................................................................................................................... 32
4.8.4 Software Requirements ........................................................................................................................... 32
4.8.5 Pinout Feature Connector J9 .................................................................................................................... 33
5 Special Features ............................................................................ 34
5.1 Watchdog Timer ...................................................................................................................................... 34
5.2 SATA Support .......................................................................................................................................... 34
5.3 Restrictions ............................................................................................................................................ 34
5.3.1 ISA Bus ................................................................................................................................................ 34
5.3.2 ISA VGA ................................................................................................................................................ 34
5.3.3 LVDS .................................................................................................................................................... 34
6 Design Considerations .................................................................... 35
6.1 Thermal Management ............................................................................................................................... 35
6.2 Heat spreader ......................................................................................................................................... 36
6.3 ETX-DC® onboard fan connector ................................................................................................................. 36
6.3.1 Schematic of fan control .......................................................................................................................... 36
6.3.2 Location and Pinout of fan connector J8 ..................................................................................................... 37
7 Important Technology Information.................................................... 38
7.1 I/O APIC vs 8259 PIC Interrupt mode ........................................................................................................... 38
7.1.1 Method of interrupts transmission ............................................................................................................. 38
7.1.2 Interrupt priority ................................................................................................................................... 38
7.1.3 More interrupts ..................................................................................................................................... 38
7.2 Thermal Monitor and Catastrophic Thermal Protection .................................................................................... 38
7.3 ACPI Suspend Modes and Resume Events ...................................................................................................... 38
8 System Resources .......................................................................... 40
8.1 Interrupt Request (IRQ) Lines .................................................................................................................... 40
8.1.1 In 8259 PIC mode ................................................................................................................................... 40
8.1.2 In APIC mode ........................................................................................................................................ 41
8.1.3 Direct Memory Access (DMA) Channels ....................................................................................................... 41