Intel STL2 manual 2.5Chipset Support Components, 2.5.1Legacy I/O Super I/O National* PC97317VUL

STL2 Server Board TPS STL2 Server Board Architecture Overview

2.4.2.3.3USB Interface

The IB6566 South Bridge contains a USB controller and USB hub. The USB controller moves data between main memory and the two USB connectors provided.

The STL2 server board provides a dual external USB connector interface. Both ports function identically and with the same bandwidth. The external connector is defined by Revision 1.0 of the USB Specification.

2.4.2.4Compatibility Interrupt Control

The IB6566 South Bridge provides the functionality of two 82C59 Programmable Interrupt Controller (PIC) devices, for ISA-compatible interrupt handling.

2.4.2.5APIC

The IB6566 South Bridge integrates a 16-entry I/O APIC that is used to distribute 16 PCI interrupts. It also includes an additional 16-entry I/O APIC for distribution of legacy ISA interrupts.

2.4.2.6Power Management

One of the embedded functions of IB6566 South Bridge is a power management controller. The STL2 server board uses this to implement ACPI-compliant power management features. STL2 supports sleep states s0, s1, s4, and s5.

2.5Chipset Support Components

2.5.1Legacy I/O (Super I/O) National* PC97317VUL

The National* PC97317VUL Super I/O Plug-and-Play Compatible with ACPI-Compliant Controller/Extender is used on the STL2 server board. This device provides the system with:

∙Real-time Clock (RTC)

∙Two serial ports

∙One parallel port

∙Floppy disk controller (FDC)

∙PS/2-compatible keyboard and mouse controller

∙General purpose I/O pins

∙Plug-and-Play functions

∙A power management controller

The STL2 server board provides the connector interface for the floppy, dual serial ports, parallel port, PS/2 mouse and the PS/2 keyboard. Upon reset, the SIO reads the values on strapping pins to determine the boot-up address configuration.

Revision 1.0 2-15