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2 System Board
The Input/Output Controller Hub 2 (82801BA)
The Input/Output Controller Hub 2 (82801BA)
The ICH2 is encapsulated in a 360-pin Enhanced Ball Grid Array (EBGA)
package and is located on the system board just underneath the AGP
connector. It provides the interface between the PCI bridge (PCI Rev. 2.2
compliant with support for 32-bit 33 MHz PCI operations),
PCI-to-LPC (Low Pin Count) bridge, IDE controller, USB controller,
SMBus controller and Audio Codec ’97 controller.
The ICH2 functions and capabilities are discussed in detail later on in this
section. The following figure shows an example of the system block
diagram using the ICH2.
LPC / FWH Link
I850 Memory
Controller Hub
(MCH)
I/O Controller Hub
(ICH) 82801AA
MaxiLife
Monitoring
Chip
Serial
EEPROM
SMBus
Address (36)
Control
Data (64)
ATA/100 2 Channels
4 x USB
Controller
LCD
Status
Panel
Parallel and
Serial Ports
Keyboard,
Mouse and
Floppy
System Bus
2 IDE
Connectors
4 USB
Connectors
FirmWare Hub
(FWH)
82802AA
USB
Super I/O
NS 87364
SM Bus
Controller
Fans
Intel Pentium 4
Processor
I/O Controller Hub
(ICH2) 82801BA
PCI BridgeIDE
Controller
DMA
Controller
CS Audio
Codec
(CS4280)
Slot 1 - 32-bit/33 MHz
Slot 2- 32-bit/33 MHz
Slot 3 - 32-bit/33 MHz
PCI Bus (32-bit, 33 MHz)
133 MB/s data transfer rate
Slot 4 - 32-bit/33 MHz
Slot 5 - 32-bit/33 MHz