The Piix4E, Pci/Isa Bridge Chip (82371Eb) - HP X Class 500/550MHz Reference Manual

The PIIX4E, PCI/ISA Bridge Chip (82371EB)

The PCI-to-ISA/IDE Xcelerator chip, known as PIIX4E, is encapsulated in a 324-pin Ball
Grid Array (BGA) package.
The PIIX4E chip is a multi-function PCI device implementing a PCI-to-ISA bridge
function, a PCI IDE function, a Universal Bus host/hub function, and an Enhanced Power
Management function.
The following figure shows an example of the system block diagram using the PIIX4E chip.
Figure 2-5. System Block Diagram Using the PIIX4E Chip
PCI Bus (3.3V or 5V, 32-bit 33 MHz, 132 MB/sec data
Adaptec
AIC7880
16-bit SCSI
Controller
Internal 16-bit
SCSI Connec-
Hard
SCSI
Terminator
ISA/EIO Bus (5V, 16-bit, 8.25 MHz, 16 MB/sec data
Two
29F002T
BIOS
Chapter 2
PCI/ISA Bridge
Interrupt
Control-
PCI Bus
Interface
USB
2 x USB
Control-
USB
Intel 82093 I/O APIC
external interrupt con-
NS 97317
Keyboard, Mouse, Serial
Ports, Parallel Port, Floppy
(PIIX4E)
DMA
Control-
SMBus
Control-
ISA Bus
Interface
CD-RO
IDE
Control-
AD-1816
Super I/O
Audio
System Board
Chipset
PCI Slots
General Purpose [I,O] (30+)
SMBus
ISA Slot
41