Chapter 2
41
System Board
Chipset
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/ISA Bridge
(PIIX4E)
PCI Bus (3.3V or 5V, 32-bit 33 MHz, 132 MB/sec data
ISA/EIO Bus (5V, 16-bit, 8.25 MHz, 16 MB/sec data
BIOS
PCI Slots
USB
USB
General Purpose [I,O] (30+)
SMBus
Hard
CD-RO
Combina-
RAID-
Adaptec
AIC7880
16-bit SCSI
Controller
Interrupt
Control-
PCI Bus
Interface
DMA
Control-
ISA Bus
Interface
SMBus
Control-
IDE
Control-
2 x USB
Control-
Keyboard, Mouse, Serial
Ports, Parallel Port, Floppy
ISA Slot
Combination
AD-1816
Audio
Super I/O
NS 97317
Two
29F002T
Intel 82093 I/O APIC
external interrupt con-
LAN + SCSI
Internal 16-bit
SCSI Connec-
Terminator
SCSI
Summary of Contents for X Class 500/550MHz
Page 6: ...6 Contents ...
Page 8: ...8 Figures ...
Page 15: ...15 1 System Overview ...
Page 66: ...66 Chapter2 System Board Devices on the ISA Bus ...
Page 96: ...96 Chapter3 Interface Boards and Mass Storage Drivers Connectors and Sockets ...
Page 134: ...134 Chapter5 Tests and Error Messages Beep Codes ...
Page 135: ...135 A Regulatory Information and Warranty ...
Page 146: ...146 AppendixA Regulatory Information and Warranty HP Hardware Warranty ...