4 interrupts – Intel SE8500HW4 User Manual
Page 73
Intel® Server Board Set SE8500HW4
Electrical Specifications
Revision 1.0
Intel order number D22893-001
61
Table 36. Reset Types
Reset Type
Description
Front Panel Power Button
De-asserts PS_ON_L to the power supply and causes the system to shut down.
FP_RST_BTN_N
ITP_RST
These signals are connected to the “Sources of Reset” logic inside the PLD. Any
time any one of these signals is transitions LOW, the output of the logic
SYS_ICH_RST asserts the SYS_RST_N to ICH5. Upon which ICH5 asserts
PCI_RST_N back to PLD. Then PLD asserts the RESET# input to NB, PXH and
Intel® IOP332 Storage I/O Processor.
NB_RST
This signal is controlled through the BIOS in ICH5.
8.4 Interrupts
The Intel
®
E8500 Chipset supports both XAPIC and 8259 interrupt delivery mechanisms.
IOxAPIC controllers are located in the PXH, Intel
®
IOP332 Storage I/O Processor, and the ICH5.
The 8259 controller is located in the ICH5. Figure 17 illustrates the interrupt routing in the Intel
®
Server Board Set SE8500HW4.
Figure 17. Interrupt Block Diagram