Intel 815 - Intel 82801 AA I;O Controller Hub (ICH); Firmware Hub (FWH)

Introduction
R
20 Intel
®
815 Chipset Platform Design Guide
1.3.2.2 Intel
®
82801AA I/O Controller Hub (ICH)
The I/O Controller Hub provides the I/O subsystem with access to the rest of the system, as
follows:
• Upstream accelerated hub architecture interface for access to the GMCH
• PCI 2.2 interface (6 PCI Request/Grant pairs)
• Bus master IDE controller; supports Ultra ATA/66
• USB controller
• I/O APIC
• SMBus controller
• FWH interface
• LPC interface
• AC’97 2.1 interface
• Integrated system management controller
• Alert on LAN*
• IRQ controller
• Packaging/Power
 241 BGA
 3.3V core and 1.8V and 3.3V standby
1.3.2.3 Firmware Hub (FWH)
The hardware features of the firmware hub include:
• An integrated hardware Random Number Generator (RNG)
• Register-based locking
• Hardware-based locking
• 5 GPIs
• Packaging/Power
 40-L TSOP and 32-L PLCC
 3.3V core and 3.3V / 12V for fast programming