System Architecture 1-9
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System Architecture
The following block diagram illustrates how the Aviant BX Socket 370 provides a
highly integrated system solution. The system architecture of the Aviant BX
Socket 370 includes two main chips, the 82443BX Host Bridge and the 82371EB
PCI ISA IDE Xcelerator (PIIX4E), to support Celeron and Pentium III processors,
SDRAM with ECC, PCI bus interface, a USB port, and Ultra DMA/33 IDE Bus
Master. The onboard super I/O chip supports a PS/2 keyboard/mouse,
two UARTs (16550 compatible), floppy drives, Parallel and Infrared interfaces. In
addition, an onboard PCI device VGA/panel display provides the user with
additional flexibility and reliability.
The Aviant BX Socket 370 supports the Intel Celeron processor and the
Pentium III Flip-Chip Pin Grid Array (PC-PGA) Coppermine processor for high
performance and cost-effective applications. The Intel Celeron processor, like the
Intel Pentium Pro and Intel Pentium II processor, features a Dynamic Execution
microarchitecture and also executes MMX technology instructions for enhanced
media and communication performance. The Pentium III FC-PGA processor
provides twice the L2 cache (256k) of the Celeron processor (128k).
The North Bridge 82443BX provides a completely integrated solution for the
system controller and data path components. It provides a 64-bit GTL+ based host
bus interface, optimized 64-bit DRAM interface with ECC to support 3.3V DIMMs
at the maximum bus frequency of 100MHz, and 32-bit PCI bus interface to support
PCI devices.
The South Bridge, 82371EB PIIX4E, provides a highly integrated multifunction
PCI-to-ISA bridge. It supports Ultra DMA-33 IDE interface, full Plug-n-Play
compatibility, and Advanced Programmable Interrupt Controller (APIC) interface
on the Aviant BX Socket 370. It also supports a 2-port USB and PCI 2.1
Compliance. In addition, it also provides control to support BIOS read/write access
and external Real-Time Clock (RTC) to maintain the date and time of the system.
