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1.1.2.4 I/O Controller Hub : Intel 82801DBM
The Intel 82801DBM ICH4-M integrates three Universal Serial Bus 2.0 Host Controllers, the Audio Controller
with AC 97 Interface, the IDE Master/Slave controllers, and Intel® I/O Hub architecture. The PCI to LPC
Bridge, I/O Advanced Programmable Interrupt Controller, legacy system I/O and legacy power management
functionalities are integrated as well.
The integrated Universal Serial Bus Host Controllers features Dual Independent UHCI Compliant Host
controllers with six USB ports delivering 480 Mb/s bandwidth and rich connectivity. Besides, Legacy USB
devices as well as over current detection are also implemented.
MSI interrupt messages
Power Management state change
SMI, SCI, and SERR error indication
Power Management
SMRAM space remapping to A0000h (128-KB)
Supports extended SMRAM space above 256- MB ,additional 1 MB TSEG from top of Memory,
cacheable (cacheability controlled by CPU)
APM rev 1.2 compliant power management
Supports Suspend to System Memory(S3),Suspend to Disk(S4) and Hard Off/Total Reboot(S5)
ACPI 1.0b,2.0 Support
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TECHNICAL SERVICE MANUAL
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