Product Description
25
1.8 Intel
®
850 Chipset
The Intel 850 chipset consists of the following devices:
• Intel 82850 MCH with Accelerated Hub Architecture (AHA) bus
• Intel 82801BA ICH2 with AHA bus
• Intel
82802AB FWH
The MCH is a centralized controller for the system bus, the memory bus, the AGP bus, and the
AHA interface. The ICH2 is a centralized controller for the board’s I/O paths. The FWH provides
the nonvolatile storage of the BIOS. The component combination provides the chipset interfaces
as shown in Figure 5.
850 Chipset
82801BA
I/O Controller Hub
(ICH2)
82850
Memory Controller
Hub (MCH)
82802AB 4 Mbit
Firmware Hub
(FWH)
AHA
Bus
System Bus
ATA-66/100
USB
AGP
Interface
OM12396
Network
AC LinkPCI BusSMBus
Dual RAMBUS
Channels
LPC Bus
Figure 5. Intel 850 Chipset Block Diagram
✏
NOTE
The USB bus is routed from the NEC USB 2.0 controller if the USB 2.0 option is supported.
For information about Refer to
The Intel 850 chipset http://developer.intel.com
Chipset resources Section 1.3, page 19
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