Product Summary

The NH82801FBM is an Intel I/O Controller Hub. The PCI-to-PCI bridge resides in PCI Device 30, Function 0 on bus #0. This portion of the NH82801FBM implements the buffering and control logic between PCI and Direct Media Interface (DMI). The arbitration for the PCI bus is handled by this PCI device. The PCI decoder in this device must decode the ranges for the DMI. All register contents are lost when core well power is removed. Direct Media Interface (DMI) is the chip-to-chip connection between the Memory Controller Hub / Graphics and Memory Controller Hub ((G)MCH) and I/O Controller Hub NH82801FBM. This highspeed interface integrates advanced priority-based servicing allowing for concurrent traffic and true isochronous transfer capabilities. Base functionality is completely software transparent permitting current and legacy software to operate normally.

Parametrics

NH82801FBM absolute maximum ratings: (1)Voltage on any 3.3 V Pin with respect to Ground: -0.5 to Vcc3_3 + 0.5 V; (2)Voltage on any 5 V Tolerant Pin with respect to Ground (V5REF=5V): -0.5 to V5REF + 0.5 V; (3)1.5 V Supply Voltage with respect to VSS: -0.5 to 2.1 V; (4)2.5 V Supply Voltage with respect to Vss: -0.5 to 3.1 V; (5)3.3 V Supply Voltage with respect to VSS: -0.5 to 4.6 V; (6)5.0 V Supply Voltage with respect to VSS: -0.5 to 5.5 V; (7)V_CPU_IO Supply Voltage with respect to VSS: 0.8 to 1.75 V.

Features

NH82801FBM features: (1)Transmit SOS packets from S0–S5 states; (2)System Health Heartbeats; (3)Watchdog Timer for operating system lockup/System Hang/Failure to Boot; (4)General Push support for BIOS (POST messages); (5)Presence Ping Response; (6)Configurable Boot Options; (7)Capabilities Reporting; (8)Auto-ARP Support.

Diagrams

NH82801FBM pin connection

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